A target rod comprises a first glass region extending along the target rod longitudinal axis and a marker region extending along the target rod longitudinal axis and adjacent to the first glass region, which marker region contains the marker element or provides a hollow channel that either forms the marker element or is designed for receiving the marker element, and the semi-finished product comprises the cladding material layer and the target rod.
One aspect is a heat reflective member, a laminated structure in which quartz glass layers are formed on an upper surface and a lower surface of a siliceous sintered powder layer. The heat reflective member has an impermeable layer formed at a portion of the siliceous sintered powder layer at a cut-out end portion of the heat reflective member. The impermeable layer has a thickness at least larger than half of a thickness of the siliceous sintered powder layer and through which a gas or a liquid is prevented from penetrating. A buffer layer is formed between the impermeable layer and the siliceous sintered powder layer next to the impermeable layer and spaced apart from the cut-out end portion. The buffer layer changes in density from the impermeable layer toward the siliceous sintered powder layer.
Methods for producing a multicore fiber comprise a method step in which a component group is reshaped to form the multicore fiber or a pre-form for the multicore fiber, which comprises a hollow cylinder comprising a central bore and a hollow cylinder longitudinal axis, which hollow cylinder comprises a cladding glass region made of cladding glass and a plurality of core glass regions occupied by a core glass, wherein at least part of the central bore is occupied by a glass filling material. In order to provide a method for producing multicore fibers without central signal core, in which the risk of rejects during the completion of the hollow glass cladding cylinder is reduced, a marker element made of marker glass adjacent to the glass filling material is used, which extends along the longitudinal axis of the central bore.
In a known method for producing a capillary winding, one end (4b) of a quartz glass capillary (4) is fixed to a platform (9; 39; 49; 59; 69; 79) and wound to form the capillary winding (1; 31; 51; 61; 71). In order to provide a manufacturing method for a capillary winding that is economical and makes it possible to produce particularly compact capillary windings which are as free from bending stresses as possible, according to the invention, the winding of the quartz glass capillary (4) comprises a thermal-plastic deformation process in which the quartz glass capillary (4) is continuously fed to a heating region (7b) at a feed speed, the quartz glass capillary (4) is softened region by region in the heating region (7b) to form a deformation region (12), and is continuously deformed to form the capillary winding (1; 31; 51; 61; 71) by the platform (9; 39; 49; 59; 69; 79) being moved, by computer control, relative to the heating region (7b) along a movement path at a movement speed.
An anti-resonance element preform for producing an anti-resonant hollow-core fiber, comprising a first longitudinal axis, an ARE outer element designed in a circular arc-like manner, and an ARE inner element, wherein the ARE outer element and the ARE inner element are connected to one another along two connecting lines, which are arranged essentially in parallel to the first longitudinal axis. It is provided that the ARE outer element has an inner space, which is at least partially limited by an ARE outer wall and into which the ARE inner element, designed in a circular arc-like manner, protrudes at least partially.
A known method for producing a tubular quartz glass composite body in an outer deposition process comprises providing and rotating a substrate tube about an axis of rotation, depositing SiO2 particles on the outer jacket surface of the tube forming a composite consisting of the tube and a SiO2 soot body, and sintering the composite by heating to form the tubular quartz glass composite body, and using a holding device which is suitable for holding the composite body at least temporarily in the heating zone with the longitudinal axis of the substrate tube oriented vertically. To enable the production on this basis of a tubular composite body consisting of quartz glass with a particularly large inner diameter and with a wall with reduced scrap, it is proposed that a holding device is used which comprises a holding element which is produced in a holding region of the substrate tube.
A device for producing a tubular SiO2 blank in an external deposition process has a substrate tube and a substrate tube holder comprising a clamping device, which is designed to support the substrate tube and to rotate the substrate tube about an axis of rotation. In order to provide, on this basis, a reproducible and operationally reliable holder for a large-volume, tubular SiO2 blank in an external deposition process, it is proposed that the substrate tube holder comprise a clamping mechanism which has a first pressure unit abutting the first substrate tube end face, a second pressure unit abutting the second substrate tube end face, and at least one force element which is designed to generate an axial contact pressure with a force component acting in the direction of the longitudinal axis of the substrate tube.
A method for producing a tubular quartz glass composite body in an outside deposition method comprising the following method steps: providing a substrate tube, rotating the substrate tube about a rotation axis, depositing SiO2 particles on the outer lateral surface of the substrate tube to form a composite consisting of the substrate tube and an SiO2 soot body, and sintering the composite by heating at a sintering temperature to form the tubular quartz glass composite body. A substrate tube is provided which consists at least partially of quartz glass of a first quartz glass quality, and that the soot body consist of quartz glass of a second quartz glass quality, wherein the first quartz glass quality has a material-specific viscosity at the sintering temperature that is higher than the material-specific viscosity of the second quartz glass quality.
A method for determining the refractive index profile of a preform when the RIP is not substantially symmetrical. (i) The preform is scanned, starting with a first projection angle, and raw data are created representing the object through measured data. (ii) Optionally, the object is rotated and step (i) repeated iteratively until all projection angles have been scanned and all measured data have been created. (iii) The measured data are processed to form a sinogram and, if the optional step (ii) has been completed, the method proceeds to step (v). (iv) The object is rotated and steps (i) and (iii) are repeated iteratively until all projection angles have been scanned. (v) A 2D RIP is calculated. (vi) A line section of interest is selected within the 2D RIP. (vii) A fitting procedure is applied to the line section of interest. (viii) Finally, refractive index steps/gradients and dimensions are determined.
G01N 21/41 - RefractivityPhase-affecting properties, e.g. optical path length
G01N 21/39 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
G01N 21/88 - Investigating the presence of flaws, defects or contamination
09 - Scientific and electric apparatus and instruments
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers and swimmers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus; instruments for diagnosis [for scientific use]; measuring instruments; Optical glasses; optical glass in the form of discs or of plates, all made of fused silica or of glass; glassware for scientific or laboratory use [specifically adapted]; quartz glass for scientific or laboratory use [specifically adapted]; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for scientific or laboratory use [specifically adapted]; quartz glass in the form of in particular pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for scientific or laboratory use [specifically adapted]; optical lenses; optical glass; mirrors [optics]; optical prisms; optical lenses (parts for lasers, not for medical purposes); optical glass (parts for lasers, not for medical purposes); mirrors [optics] (parts for lasers, not for medical purposes); optical prisms (parts for lasers, not for medical purposes); fiber optic cables; semi-finished cores rods for fiber optic cables; semi-finished cladding cylinders for fiber optic cables; semi-finished end caps for optical fibers; crystal filters; single-crystal silicon wafers; electric cables, wires, conductors and connection fittings therefor; circulators [electric or electronic components]; semiconductor component; silicon chips [electronic components]; optical measuring components. Household or kitchen utensils and containers; cookware and tableware, except forks, knives and spoons; combs and sponges; brushes, except paintbrushes; brush-making materials; articles for cleaning purposes; unworked or semi-worked glass, except building glass; glassware, porcelain and earthenware; vitreous silica fibers, other than for textile use; fused silica [semi-worked product], other than for building; fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; doped fused silica [semi-worked product], other than for building; doped fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; translucent fused silica [semi-worked product], other than for building; translucent fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; opaque fused silica [semi-worked product], other than for building; opaque fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic quartz glass [semi-worked product], other than for building; synthetic quartz glass [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic black quartz glass [semi-worked product], other than for building; synthetic black quartz glass [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic quartz glass fibers, not for textile purposes; quartz glass [unworked or semi-worked], except building glass in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the chemical industry, the electrical industry and the semiconductor industry.
01 - Chemical and biological materials for industrial, scientific and agricultural use
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
10 - Medical apparatus and instruments
11 - Environmental control apparatus
17 - Rubber and plastic; packing and insulating materials
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
Chemicals for use in industry, science and photography, adhesives for use in industry; putties and other paste fillers; synthetic silicic acid, more particularly synthetic silicic acid that is produced in a flame hydrolytic process; granulates made of synthetic silicic acid; chemical agents for the production of slip, more particularly chemical agents for the production of slip containing silicon dioxide; chemical agents for the production of black glass, more particularly chemical agents for the production of black glass that is opaque throughout; ceramic compositions for sintering [granules and powders]; ceramic materials in particulate form, especially for use as filtering material; compositions for the manufacture of technical ceramics. Machine tools, 3d-printing machines. Scientific, measuring, controlling devices and instruments; reflectors as part of or accessories to lasers [all goods for non-medical purposes]; products made of quartz glass for laboratory purposes, namely, cuvettes, crucibles, dishes, beakers, bell jars, flanges, combustion boats, catalyst supports; products made of quartz glass for optical devices such as plates, filters, mirror holders; fiber optic cables; semi-finished product for fiber optic cables, namely, cores rods for fiber optic cables and cladding cylinders for fiber optic cables; optical fibers [light conducting filaments]; optical lenses; optical glass; mirrors [optics]; optical apparatus and instruments; lenses, mirrors or reflectors, more particularly lenses, mirrors or reflectors made of quartz glass and for use in detectors for determining physical quantities of electromagnetic waves; lenses, mirrors or reflectors, more particularly lenses, mirrors or reflectors made of quartz glass and for use in spectrometers or reflectometers; lenses, mirrors or reflectors, more particularly lenses, mirrors or reflectors made of quartz glass and for use in systems for photolithographic structuring of a photoresist layer, more particularly in systems for photolithographic structuring of a photoresist layer during the production of integrated circuits; lenses, mirrors or reflectors, more particularly lenses, mirrors or reflectors made of quartz glass and for use in vacuum chambers for the modification of surfaces, more particularly for metallizing, hardening, sputtering or plasma etching surfaces, more particularly for LED production; lenses, mirrors or reflectors, more particularly lenses, mirrors or reflectors made of quartz glass and for use in camera systems for optical quality control or for controlling positioning systems, more particularly camera systems for optical quality control or for controlling positioning systems operating at a wavelength of 2000 to 3500 nm. Surgical, medical, dental and veterinary apparatus and instruments; orthopaedic articles; suture materials; therapeutic and assistive devices adapted for the disabled; therapeutic and prosthetic articles and devices for implantation composed of artificial or synthetic materials, for example, surgical implants composed of artificial materials, artificial breasts, brain pacemakers, biodegradable bone fixation implants; optical fused silica fibers for catheters, for laser light or data transmission into the body via minimal invasive operations. Apparatus and installations for lighting, heating, cooling, steam generating, cooking, drying, ventilating, water supply and sanitary purposes; lighting devices; lighting systems and illuminants for lighting systems for hardening, cleaning or activating a surface as preparation of further method steps or for modifying a surface structure, all of the aforementioned steps in particularly with ultraviolet (UV) radiation. Unprocessed and semi-processed rubber, guttapercha, gum, mica and substitutes for all these materials; plastics and resins in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, tubes and hoses, not of metal; insulators for electrical purposes, more particularly insulators for electrical machinery and systems in the semiconductor industry, all of the aforementioned insulators in particular made of ceramic materials or of quartz glass; glass wool, more particularly for thermal insulation. Household or kitchen utensils and containers; cookware and tableware, except forks, knives and spoons; combs and sponges; brushes, except paintbrushes; brush-making materials; articles for cleaning purposes; unworked or semi-worked glass, except building glass; glassware, porcelain and earthenware; unworked or semi-worked glass, with the exception of structural glass; glassware, chinaware and earthenware; translucent vitreous glass [semi-finished product, except for construction purposes] as well as semi-finished products made thereof, especially pipes, bars, plates, blocks, rings; synthetic quartz glass [semi-finished product, except for construction purposes] as well as semi-finished products made thereof, especially pipes, bars, plates, blocks, rings; synthetic quartz glass fibers, not for textile purposes; vitreous silica fibers, other than for textile use; synthetic black quartz glass [semi-finished product, except for construction purposes] as well as semi-finished products made thereof, especially pipes, bars, plates, blocks, rings; synthetic opaque quartz glass [semi-finished product, except for construction purposes] as well as semi-finished products made thereof, more especially pipes, bars, plates, blocks, rings; opaque quartz glass fibers, not for textile purposes; black quartz glass bodies that are opaque throughout, preferably for lighting systems or illuminants for lighting systems; semi-finished products made of ceramic material in the form of pipes, bars, plates, blocks and rings (not for building); fused silica as low expansion material for precision positioning; semi-finished products made of quartz glass for use in the chemical industry, the electrical industry and the semiconductor industry. Treatment of quartz glass surfaces; treatment of ceramic surfaces; applying partial opaque reflective coating onto fused silica parts, possibly lamps, windows, tubes, reactor chambers; applying partial coatings onto fused silica parts, especially applying partial coatings onto parts for lamps, windows, tubes or reactor chambers; applying partial reflective coatings onto fused silica parts, especially applying partial reflective coatings onto parts for lamps, windows, tubes or reactor chambers; applying partial opaque reflective coatings onto fused silica parts, especially applying partial opaque reflective coating onto parts for lamps, windows, tubes or reactor chambers; applying a silica coating for protecting metal parts from excessive heat or corrosion; surface treatments for stronger surface adhesion, namely acid structuring of surfaces. Scientific and technological services and research and design relating thereto; industrial analysis and industrial research services; chemical or physical analysis of samples, especially analysis of impurities, analysis of viscosity, analysis of transmission or analysis of reflection properties, analysis of stress induced birefringence, analysis of variation of refractive index of fused silica glasses.
12.
METHOD AND SEMI-FINISHED PRODUCT FOR FABRICATING MULTICORE FIBERS
A method for fabricating a multicore fiber comprised of an elongate base body containing a glass cladding material and having at least two through-holes, inserting a core rod into the through-holes so as to form a component ensemble, drawing the component ensemble to form the multicore fiber, wherein the component ensemble is held from above by a holder made of glass, which is connected to the base body so as to form a welding contact surface. The fitting of the base body with core rods is not limited by the layout of the holder, and which in particular allows placement of all core rods from above even after the holder has been welded on, a holder with an elongate hollow part is used, having a hollow channel with an inner contour that is larger than a hole area circumference within which the through-holes lie at least 90% of their diameter.
The invention relates to an anti-resonant hollow core fiber (1000), comprising a fiber longitudinal axis (2300) and a fiber core radius R_Faser (2310), a fiber cladding (2000) having a cladding inner bore (2200), a number of anti-resonant units (3000), • each comprising an ARE external unit (3100) and an ARE internal unit (3400), • wherein the circular-arcuately designed ARE external unit (3100) and the circular-arcuately designed ARE internal unit (3400) are connected to one another along two seam lines (3700, 3700') such that the ARE internal unit (3400) at least partially projects into a first interior (3170) of the ARE external unit (3100), wherein the anti-resonant units (3000) are arranged spaced apart from one another and without contact with one another at target positions on a cladding inner side (2150), wherein, in at least one anti-resonant unit (3000), • an ARE arc unit (3900) is arranged in the first interior (3170), • the ARE arc unit (3900) is circularly designed and • has a radius FB_R (3920), and • the ARE arc unit (3900) is connected to the ARE internal unit (3400) along a contact seam (3730). According to the invention, provision is made for the following to apply to the ratio of twice the radius of the ARE arc unit FB_R (3920) to the fiber core radius R_Faser (2310): (I).
A method for depositing SiO2 soot particles on a deposition surface using at least two mutually spaced and adjacent build-up burners, and a corresponding device for carrying out the method.
Optical components in the form of anti-resonant hollow-core fibres or preforms therefor contain a hollow core, a jacket with a circumferential inner side that faces the hollow core, and anti-resonant structural elements. In order to provide a method for producing an optical component with anti-resonant structural elements of a first type, which depart from the circular or oval shape and which are respectively of arcuate design in cross section as seen in the direction of the longitudinal axis of the component, with a left-hand arc end and with a right-hand arc end and with a bulge towards the hollow core, wherein the arc ends are connected to the inside of the jacket at contact points and, together with the inside of the jacket, span a curvature surface, the present document proposes a method.
The invention relates to the production of an anti-resonant hollow-core fiber consisting of a capillary blank and a sleeve tube. The capillary blank comprises an external capillary and a nested internal capillary, and is stretched to a maximum external diameter ODARE_cap and a maximum wall thickness WTARE_caP. The blank is mounted on the inside of the sleeve tube. In order to retain the advantages of the pre-produced capillary blank with respect to ease of assembly and precision, while keeping the associated drawbacks owing to ovality low and predictable, it is proposed that the geometric internal diameter and external diameter of the external capillary and of the internal capillary, as well as ODARE_cap and WTARE_caP, are aligned in relation to one another in such a way that the ARE-external capillary of the capillary blank has a degree of ovality of less than 1.025.
A method for producing a preform of an anti-resonant hollow-core fiber, which has a hollow core extending along a fiber longitudinal axis, and a cladding region surrounding the hollow core and includes at least one anti-resonance element. The method includes (a) providing a cladding tube having a cladding tube inner surface and a cladding tube outer surface, at least one anti-resonance element preform being arranged at the cladding tube inner surface, (b) providing an overlay tube including an overlay tube inner surface, the overlay tube having an inner diameter larger than an outer diameter of the cladding tube, (c) arranging the cladding tube inside the overlay tube, so that the overlay tube inner surface surrounds the cladding tube outer surface, and (d) adding the overlay tube to the cladding tube, so that the overlay tube inner surface connects to the cladding tube outer surface.
The invention relates to microstructured optical fibers that are drawn through hollow channels and have a core region, which extends along a fiber longitudinal axis, and a jacket region surrounding the core region. The aim of the invention is to reduce a damping increase due to corrosion and to reduce the emission of chlorine on the basis of the microstructured optical fibers. This is achieved in that at least some of the hollow channels are delimited by a wall material made of synthetic quartz glass which has a chlorine concentration of less than 300 wt. ppm and oxygen deficiency centers in a concentration of at least 2×1015 cm-3.
The invention relates to an anti-resonance ele-ment preform for producing an anti-resonant hollow-core fiber, in an axial top view comprising a circular first cir-cle element with a first circle radius and a circular arc-shaped first circular arc element with a first circular arc radius. Furthermore, the invention relates to a method for producing an anti resonance element preform, a preform for producing an anti-resonant hollow-core fiber comprising at least one anti-resonance element preform and an anti-resonant hol-low-core fiber. According to the invention, it is provided that the first circle element and the first circular arc element are connected to one another at two contact points.
A method for producing a preform of an anti-resonant hollow-core fiber, comprising the method steps of
a) providing a cladding tube, which has a cladding tube inner bore and a cladding tube longitudinal axis, along which a cladding tube wall extends, which is limited by an inner side and an outer side
b) preparing a number of anti-resonance element preforms, which consist of several nested tubular structural elements, comprising an ARE outer tube and an ARE inner tube inserted therein, wherein the structural elements have a structural element longitudinal axis,
c) arranging the anti-resonance element preforms on the inner side of the cladding tube wall, and
d) thermal fixing of the anti-resonance element preforms to the cladding tube wall by means of heat input.
A method for producing a preform of an anti-resonant hollow-core fiber, comprising the steps of
a) providing a cladding tube, which has a cladding tube inner bore and a cladding tube longitudinal axis, along which a cladding tube wall extends, which is limited by an inner side and an outer side,
b) preparing a number of anti-resonance element preforms, each comprising an ARE outer tube and an ARE inner tube inserted therein,
c) preparing a positioning template, having a number of passage openings passing through the positioning template, adapted for a longitudinal guidance of an anti-resonance element preform each, wherein the positioning template and the cladding tube are made of identical material,
d) attaching the positioning template to a first end of the cladding tube,
e) inserting at least parts of the anti-resonance element preforms through the passage openings.
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
a microscopic, production-related layer structure,
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
a microscopic, production-related layer structure,
dividing the glass body into a plurality of rod-like glass body portions,
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
a microscopic, production-related layer structure,
dividing the glass body into a plurality of rod-like glass body portions,
spatially measuring the titanium profile in each of the glass body portions,
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
a microscopic, production-related layer structure,
dividing the glass body into a plurality of rod-like glass body portions,
spatially measuring the titanium profile in each of the glass body portions,
connecting the glass body portions to form an elongate first glass component,
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
a microscopic, production-related layer structure,
dividing the glass body into a plurality of rod-like glass body portions,
spatially measuring the titanium profile in each of the glass body portions,
connecting the glass body portions to form an elongate first glass component,
first homogenization treatment of the first glass component,
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
a microscopic, production-related layer structure,
dividing the glass body into a plurality of rod-like glass body portions,
spatially measuring the titanium profile in each of the glass body portions,
connecting the glass body portions to form an elongate first glass component,
first homogenization treatment of the first glass component,
pushing together the first glass component to create a spherical glass system,
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
a microscopic, production-related layer structure,
dividing the glass body into a plurality of rod-like glass body portions,
spatially measuring the titanium profile in each of the glass body portions,
connecting the glass body portions to form an elongate first glass component,
first homogenization treatment of the first glass component,
pushing together the first glass component to create a spherical glass system,
turning the glass system more than 70 degrees,
A method for producing a substrate precursor having a mass of more than 100 kg, comprising a TiO2-SiO2 mixed glass, comprising the steps including:
introducing a silicon dioxide raw material and a titanium dioxide raw material into a flame,
producing a glass body having a titanium dioxide content of 3 wt. % up to 10 wt. %, the glass body comprising:
a macroscopic, production-related titanium profile, and
a microscopic, production-related layer structure,
dividing the glass body into a plurality of rod-like glass body portions,
spatially measuring the titanium profile in each of the glass body portions,
connecting the glass body portions to form an elongate first glass component,
first homogenization treatment of the first glass component,
pushing together the first glass component to create a spherical glass system,
turning the glass system more than 70 degrees,
and stretching the glass system.
09 - Scientific and electric apparatus and instruments
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
GPS navigation device; apparatuses and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing data; computers and computer peripheral devices; fiber optics; optical fibers; optical cables; optical fiber network cables; optical waveguides for high power beam delivery for telecommunications applications; optical waveguides for high power beam delivery; optical data links, all for telecommunications; optical fibers made of fused silica; optical cables, comprising optical fibers made of fused silica Unworked or semi-worked glass, except building glass; fused quartz as a semi-finished product, namely, ingots, tubes, rods, discs, plates and rings all for general industrial and further manufacturing use; vitreous silica fibers, other than for textile use; fused silica as a semi-finished product, namely, ingots, tubes, rods, discs, plates and rings all for general industrial and further manufacturing use, other than for building; semi-finished core rods made of fused silica for fiber optic cables for further manufacturing use; semi-finished cladding cylinders made of fused silica for fiber optic cables for further manufacturing use; semi-finished end caps made of fused silica for optical fibers for further manufacturing use
09 - Scientific and electric apparatus and instruments
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
GPS navigation device; apparatuses and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing data; computers and computer peripheral devices; fiber optics; optical fibers; optical cables; optical fiber network cables; optical waveguides for high power beam delivery for telecommunications applications; optical waveguides for high power beam delivery; optical data links, all for telecommunications; optical fibers made of fused silica; optical cables, comprising optical fibers made of fused silica Unworked or semi-worked glass, except building glass; fused quartz as a semi-finished product, namely, ingots, tubes, rods, discs, plates and rings all for general industrial and further manufacturing use; vitreous silica fibers, other than for textile use; fused silica as a semi-finished product, namely, ingots, tubes, rods, discs, plates and rings all for general industrial and further manufacturing use, other than for building; semi-finished core rods made of fused silica for fiber optic cables for further manufacturing use; semi-finished cladding cylinders made of fused silica for fiber optic cables for further manufacturing use; semi-finished end caps made of fused silica for optical fibers for further manufacturing use
09 - Scientific and electric apparatus and instruments
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers and swimmers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus; Fiber optics; Optical fibers; Optical cables; Optical networks; Optical waveguides; semi-finished cores rods for fiber optic cables; semi-finished cladding cylinders for fiber optic cables; semi-finished end caps for optical fibers; optical links all for telecommunications; cable assemblies. Household or kitchen utensils and containers; Cookware and tableware, except forks, knives and spoons; Combs and sponges; Brushes, except paintbrushes; Brush-making materials; Articles for cleaning purposes; Unworked or semi-worked glass, except building glass; Glassware, porcelain and earthenware; Fused quartz; Vitreous silica fibers, other than for textile use; Silica (Fused -) [semi-worked product], other than for building.
09 - Scientific and electric apparatus and instruments
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers and swimmers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus; Fiber optics; Optical fibers; Optical cables; Optical networks; Optical waveguides; semi-finished cores rods for fiber optic cables; semi-finished cladding cylinders for fiber optic cables; semi-finished end caps for optical fibers; optical links all for telecommunications; cable assemblies. Household or kitchen utensils and containers; Cookware and tableware, except forks, knives and spoons; Combs and sponges; Brushes, except paintbrushes; Brush-making materials; Articles for cleaning purposes; Unworked or semi-worked glass, except building glass; Glassware, porcelain and earthenware; Fused quartz; Vitreous silica fibers, other than for textile use; Silica (Fused -) [semi-worked product], other than for building.
27.
METHOD AND INTERMEDIATE PRODUCT FOR PRODUCING A MULTI-CORE FIBRE WITH A MARKER
Known methods for producing a multi-core fibre with a marker zone or a pre-form for a multi-core fibre of this type comprise the formation of a semi-finished product having a glass casing region formed of a casing glass with multiple glass core regions made of a core glass embedded therein, and having at least one marker element, and an elongation of the semi-finished product, forming the multi-core fibre or the pre-form for same. The creation of a glass casing region can be carried out on the basis of an external deposition method, in which a casing material layer is deposited on an outer casing of a target rod. According to the invention, in order to avoid the disadvantages arising in the context of creating the central hole with the external deposition method, while taking advantage of the cost benefits of the external deposition method, the target rod has a first glass region extending along the target rod longitudinal axis and a marker region extending along the target rod longitudinal axis and adjacent to the first glass region, which contains the marker element or provides a hollow channel that either forms the marker element or is designed for receiving the marker element, and the semi-finished product comprises the casing material layer and the target rod.
A known method for producing a multicore fibre with a marker zone close to the edge comprises a method step in which a component group is reshaped to form the multicore fibre or to form a pre-form for the multicore fibre, wherein the component group comprises a cylinder having a cylinder longitudinal axis and an outer casing surface and having a glass casing region made of casing glass, multiple glass core regions provided with a core glass and extending in the direction of the cylinder longitudinal axis, which are surrounded by the casing glass, and at least one marker element extending in the direction of the cylinder longitudinal axis. In order to provide a method on this basis for producing multicore fibres with a marker zone close to the edge, in which the risk of rejects is reduced, according to the invention, the marker element is arranged on the outer casing surface of the glass casing cylinder, wherein a longitudinal groove is created in the outer casing surface of the glass casing region and extending in the direction of the cylinder longitudinal axis, and the marker element is melted into the longitudinal groove before the reshaping to form the pre-form or the multicore fibre.
Known methods for producing a multicore fibre comprise a method step in which a component group is reshaped to form the multicore fibre or to form a pre-form for the multicore fibre, comprising a hollow cylinder having a central hole and a hollow cylinder longitudinal axis, and having a glass casing region made of casing glass and multiple glass core regions provided with a core glass, wherein at least one part of the central hole is provided with a glass filling material having a filling rod longitudinal axis and a filling rod outer casing surface. In order to provide a method, on this basis, for producing multicore fibres without a central signal core, in which the risk of rejects is reduced in the finishing of the glass casing hollow cylinder, according to the invention, a recess extending in the direction of the filling rod longitudinal axis is generated in or on the filling rod, into which a marker element made of marker glass is introduced or which forms the marker element.
A method for determining an index-of-refraction profile of an optical object, which has a cylindrical surface and a cylinder longitudinal axis, said method comprising the following method steps: (a) scanning the cylindrical surface of the object at a plurality of scanning locations by means of optical beams; (b) capturing, by means of an optical detector, a location-dependent intensity distribution of the optical beams deflected in the optical object; (c) determining the angles of deflection of the zero-order beams for each scanning location from the captured intensity distribution, comprising eliminating beam intensities, and (d) calculating the index-of-refraction profile of the object on the basis of the angle-of-deflection distribution, wherein method steps (a) and (b) are carried out with light beams having at least two different wavelengths.
A method for homogenizing glass includes the method: providing a cylindrical blank composed of the glass having a cylindrical outer surface that extends along a longitudinal axis of the blank between a first end face and a second end face, forming a shear zone in the blank by softening a longitudinal section of the blank and subjecting it to a thermal-mechanical intermixing treatment, and displacing the shear zone along the longitudinal axis of the blank. The displacement of the shear zone along the longitudinal axis of the blank is superimposed by a simultaneous oscillating motion of the shear zone along the longitudinal axis of the blank. The first end of the blank is rotated at a first rotational speed and the second end of the blank is rotated at a second rotational speed. An oscillating motion of the shear zone is generated by periodically varying the first and/or second rotational speed.
C03B 32/00 - Thermal after-treatment of glass products not provided for in groups , e.g. crystallisation, eliminating gas inclusions or other impurities
Known methods for fabricating a multicore fiber comprise the steps of providing an elongate base body containing a glass cladding material and having at least two through-holes, inserting a core rod into the through-holes so as to form a component ensemble, drawing the component ensemble to form the multicore fiber or processing the component ensemble further to form a preform from which the multicore fiber is drawn, wherein the component ensemble is held from above by a holder made of glass, which is connected to the base body so as to form a welding contact surface. In order to specify a method based on this, in which the fitting of the base body with core rods is not limited by the layout of the holder, and which in particular allows placement of all core rods from above even after the holder has been welded on, according to the invention a holder with an elongate hollow part is used, having a hollow channel with an inner contour that is larger than a hole area circumference within which the through-holes lie completely or with at least 90% of their hole diameter, and having a radial outer dimension that is larger than the base body outer diameter.
Producing a molded body made of opaque quartz glass includes providing SiO2 grains obtained by comminuting quartz glass having a purity of at least 99.9 wt % SiO2, forming a slurry containing a suspension liquid and the SiO2 grains and which has a total solids content, wet grinding the SiO2 grains in the slurry so as to form ground SiO2 grain particles, forming a porous green body from the slurry, and sintering the porous green body. To provide a low cost quartz glass, the wet grinding of the SiO2 grains takes place at least temporarily in the presence of SiO2 nanoparticles, the proportion of which in the total solids content of the slurry is in the range of 0.1 wt % to 10 wt %, and the slurry has a solids content in the range of 76 to 80 wt % after addition of the SiO2 nanoparticles and after the wet grinding.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that a secondary preform is formed which has an outer diameter ranging from 30 to 90 mm, and at least one of the end faces of the anti-resonant element preforms is closed prior to drawing the fiber.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and further processing the primary preform in order to form a secondary preform, including a process of elongating the primary preform in order to directly form the hollow-core fiber or to form the secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that a primary preform with an outer diameter ranging from 20 to 70 mm is used for the elongation process.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that a positioning template is inserted into the cladding tube inner bore in order to arrange the anti-resonant element preforms, said template having holding elements for positioning the anti-resonant element preforms at the target positions.
A process for manufacturing an MCF preform having a center longitudinal axis, a plurality of core rods each positioned in a respective core hole and extending along the axis, and a common cladding covering each of the plurality of core rods. The process includes the following steps. A cylinder is provided which will form the cladding of the preform and may have a center core hole. Peripheral core holes are created in the cylinder extending along the longitudinal axis. Each of a plurality of core rods is inserted into a respective peripheral core hole. The cylinder with the core rods inserted in the respective core holes is heated by exposing the cylinder and core rods to a heating element, thereby integrating the core rods and the cylinder and forming the preform, wherein the position error of the core holes with respect to the diameter of the preform is ≤ 0.6%.
Provided is a heat reflective member, which is prevented from braking even in a high-temperature environment. It generates no dust in use, and can be washed with a chemical liquid. The heat reflective member has a laminated structure in which quartz glass layers are formed on an upper surface and a lower surface of a siliceous sintered powder layer. The heat reflective member includes: an impermeable layer which is formed at a portion of the siliceous sintered powder layer at an end portion of the heat reflective member, which has a thickness at least larger than half of a thickness of the siliceous sintered powder layer, and through which a gas or a liquid is prevented from penetrating; and a buffer layer which is formed between the impermeable layer and the siliceous sintered powder layer, and which changes in density from the impermeable layer toward the sintered powder layer.
One aspect is a reflective member, which has a laminated structure in which transparent quartz glass members are formed on an upper surface and a lower surface of an opaque siliceous sintered powder layer. The opaque siliceous sintered powder layer has a thickness of 0.1 mm or more and a thickness distribution of ±0.05 mm or less. When a load is applied to each of the transparent quartz glass members on an upper surface and a lower surface of the laminated structure in a direction parallel to the laminated structure, the reflective member is fractured at a load of 5 N or more per square centimeter. The laminated structure includes a semi-transparent portion having a width of 0.01 mm or less, which has an intermediate opacity between an opacity of the opaque siliceous sintered powder layer and an opacity of each of the transparent quartz glass members.
B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
B32B 5/16 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder
B32B 17/06 - Layered products essentially comprising sheet glass, or fibres of glass, slag or the like comprising glass as the main or only constituent of a layer, next to another layer of a specific substance
C03B 19/06 - Other methods of shaping glass by sintering
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that while further processing the primary preform according to step (c), an external layer cylinder is used which has a radial viscosity profile such that the viscosity increases towards the interior of the external layer cylinder.
Known methods of producing a three-dimensional glass object comprise the step of shaping of a glass fiber, wherein the glass fiber provided with a protective sheath is fed continuously to a heating source, the protective sheath is removed under the influence of heat, and the glass fiber is softened. In order to facilitate the production of filigree or optically distortion-free and transparent glass objects as much as possible, and also enable the adjustment of optical and mechanical properties with high spatial resolution, in one aspect the glass fiber has a protective sheath with a layer thickness in the range of 10 nm to 10 μm.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that while carrying out a process according to step (c), components of the primary preform made of quartz glass and/or parts surrounding the primary preform made of quartz glass are heated and softened together, wherein the quartz glass of at least one of the preform components and/or the quartz glass of at least one of the parts surrounding the preform contains at least one dopant which decreases or increases the viscosity of quartz glass.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that a cladding tube is provided with an outer diameter ranging from 90 to 250 mm and a length of at least 1 m; tubular structural elements are provided, at least some of which have a wall thickness ranging from 0.2 to 2 mm and a length of at least 1 m; and the structural elements are arranged in the cladding tube inner bore while the cladding tube longitudinal axis is vertically oriented, the upper end face of each structural element being positioned at the target position.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved by providing anti-resonant element preforms which have at least one respective ARE outer tube and/or at least one respective ARE inner tube, wherein the ARE outer tube and/or the ARE inner tube is produced using a vertical drawing method without molding tools.
A method for producing a quartz glass body, the method comprising: forming a slurry of a powder of silicon dioxide particles and a liquid; treating the slurry with ultrasound in order to deagglomerate agglomerates formed in the slurry, and conducting the slurry through a multistage filter device to obtain a silicon dioxide suspension; forming a silicon dioxide granulate from the silicon dioxide suspension by means of granulation; forming a glass melt in a furnace and forming a quartz glass body from the glass melt; wherein the furnace has a gas outlet from which a gas is removed, wherein the dew point of the gas directly after removal is less than 0°C; wherein the multistage filter device comprises at least three filter stages, each of which contains at least one filter; wherein the first filter stage has a filter fineness of 5 µm, the second filter stage has a filter fineness of 0.5 to 5 µm and the third filter stage has a filter fineness of at most 1 µm; wherein the efficiency is at least 50% for the first filter stage, at least 95% for the second filter stage and 99.5% for the third filter stage.
The invention relates to microstructured optical fibers that are drawn through hollow channels and have a core region, which extends along a fiber longitudinal axis, and a jacket region surrounding the core region. The aim of the invention is to reduce a damping increase due to corrosion and to reduce the emission of chlorine on the basis of the microstructured optical fibers. This is achieved in that at least some of the hollow channels are delimited by a wall material made of synthetic quartz glass which has a chlorine concentration of less than 300 wt. ppm and oxygen deficiency centers in a concentration of at least 2 x 1015 cm-3.
M1SM1SHH, (d) forming a cylinder assembly, comprising the sleeve tube, the first ARE mother tube arranged coaxially therewith, and multiple support tubes arranged with parallel axes in an annular gap between the sleeve tube and the first ARE mother tube and distributed around the circumference of the annular gap, and (e) stretching the cylinder assembly to yield the optical component, reduced pressure being generated in the support tubes and increased pressure being generated in the first mother tube so that the sleeve tube in part and the support tubes at least in part collapse so as to form the contact points between the inside of the previous sleeve tube and the outside of the previous first ARE mother tube and the arcuate anti-resonance elements of the first type.
The invention relates to a preform (300a-n) for an anti-resonance element for producing an anti-resonant hollow-core fibre (2400), comprising a first longitudinal axis (311a-j,m,n), an arcuate ARE outer element (310a-n) and an ARE inner element (340a-n), wherein the ARE outer element (310a-n) and the ARE inner element (340a-n) are connected to one another along two connecting lines (370, 370') arranged substantially parallel to the first longitudinal axis (311a-j,m,n). According to the invention, it is provided that the ARE outer element (310a-n) has an interior space (317), which is at least partially bounded by an ARE outer wall and into which the arcuate ARE inner element (340a-n) at least partially protrudes.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that the step of providing the cladding tube includes a processing measure, in which the cladding tube wall is machined with a longitudinal structure extending in the direction of the cladding tube longitudinal axis in the region of the target positions.
To achieve a high degree of precision and an exact positioning of anti-resonant elements in a sufficiently stable and reproducible manner in an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, formation of anti-resonant element precursors includes formation of elongated pressure chambers, each of which adjoins a wall deformable under pressure and heat in the region of target positions of the anti-resonant elements. A section of the deformable wall is caused to protrude in the direction of a cladding tube inner bore, thereby forming an anti-resonant element or a precursor for same, while carrying out a process of elongating a primary preform to form the hollow-core fiber or further processing the primary preform to a secondary preform from which the hollow-core fiber is drawn.
Provided is a titanium-containing quartz glass having excellent UV absorption. The quartz glass absorbs ultraviolet rays having a wavelength of 250 nm or less, ozone generation-related adverse effects on the human body, are prevented, a decrease in transmittance of the quartz glass in the range from near-ultraviolet to visible light due to being colored when irradiated with ultraviolet rays does not occur, absorption build-up or lamp burst-inducing deformation build-up, which is caused by a structural change in the quartz glass that occurs in the range of 200-300 nm when irradiated with ultraviolet rays, is suppressed, and a decrease in transmittance at intended wavelength ranges does not occur even when exposed to ultraviolet rays. The titanium-containing quartz glass having excellent UV absorption is colorless, wherein the average concentration of titanium is 10-500 ppm, the concentration of OH group is 10-350 ppm.
C03C 3/06 - Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
C03B 32/00 - Thermal after-treatment of glass products not provided for in groups , e.g. crystallisation, eliminating gas inclusions or other impurities
C03C 4/08 - Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
55.
ANTI-RESONANCE ELEMENT PREFORM FOR PRODUCING AN ANTI-RESONANT HOLLOW-CORE FIBER
The invention relates to an anti-resonance element preform (100) for producing an anti-resonant hollow-core fiber (600), in an axial top view comprising a circular first circle element (200) with a first circle radius (250) and a circular arc-shaped first circular arc element (300) with a first circular arc radius (350). Furthermore, the invention relates to a method for producing an anti resonance element preform, a preform for producing an anti-resonant hollow-core fiber comprising at least one anti-resonance element preform and an anti-resonant hollow-core fiber. According to the invention, it is provided that the first circle element (200) and the first circular arc element (300) are connected to one another at two contact points (400).
The invention relates to a method (700) for producing a preform of an anti-resonant hollow-core fiber, which has a hollow core extending along a fiber longitudinal axis, and a cladding region, which surrounds the hollow core and which comprises at least one (a) providing (710) a cladding tube (200) comprising a cladding tube inner surface and a cladding tube outer surface (210), wherein at least one anti-resonance element preform (400) is arranged at the cladding tube inner surface, (b) providing (720) an overlay tube (300) comprising an overlay tube inner surface (310), wherein the overlay tube (300) has an inner diameter, which is larger than an outer diameter of the cladding tube (200), (c) arranging (730) the cladding tube (200) inside the overlay tube (300), so that the overlay tube inner surface (310) surrounds the cladding tube outer surface (210), and (d) adding (740) the overlay tube (300) to the cladding tube (200), so that the overlay tube inner surface (310) connects to the cladding tube outer surface (210).
ARE_capARE_caPARE_capARE_caPARE_caP, are determined in relation to one another in such a way that the ARE-external capillary of the capillary blank has a degree of ovality of less than 1.025.
Described is a process for the production of synthetic fused silica in which the feedstock vapor is reacted from an organosilicon starting compound and any combustible burner auxiliary gases at an air number in the burner of less than or equal to 1.00. Furthermore, one embodiment relates to a corresponding apparatus.
The invention relates to a method for producing a preform (100, 100', 100'') of an anti-resonant hollow-core fiber, having the steps of: a) providing (1000) a cladding tube (200) that has a cladding tube inner bore and a cladding tube longitudinal axis, along which a cladding tube wall delimited by an inner face and an outer face extends, b) preparing (1100) a number of anti-resonant element preforms (300), each which comprises an ARE outer tube and an ARE inner tube inserted therein, c) preparing (1200) a positioning template (400, 400', 400'') that has a number of through-openings which pass through the positioning template (400, 400', 400'') and each of which is adapted so as to longitudinally guide a respective anti-resonant element preform (300), said positioning template (400, 400', 400'') and cladding tube (200) being made of the same material, d) applying (1300) the positioning template (400, 400', 400'') onto a first end of the cladding tube (200), e) introducing (1400) at least parts of the anti-resonant element preforms (300) through the through-openings in order to arrange the anti-resonant element preforms (300) in the cladding tube inner bore, and f) processing (1500) an assembly (110, 110', 110'', 110'''), comprising the cladding tube (200), the anti-resonant element preforms (300), and the positioning template (400, 400', 400''), by means of a heating process selected from at least one process of the processes of elongation and collapsing. According to the invention, the positioning template (400, 400', 400'') has at least one centering surface which interacts with the first end of the cladding tube (200) in a self-centering manner such that the anti-resonant element preforms (300) are arranged at target positions in the "introducing" process in step e).
The invention relates to a method for producing a preform of an anti-resonant hollow-core fiber (2400), having the steps of: a) providing (1000) a cladding tube (200) that has a cladding tube inner bore (220) and a cladding tube longitudinal axis (230), along which a cladding tube wall (210) delimited by an inner face (215) and an outer face (216) extends, b) preparing (1200) a number of anti-resonant element preforms (300), which are composed of a plurality of tubular structural elements nested one inside the other, comprising an ARE outer tube (310) and an ARE inner tube (320) inserted therein, wherein the structural elements have a structural element longitudinal axis, c) arranging (1300) the anti-resonant element preforms (300) on the inner face of the cladding tube wall (210), and d) thermally fixing (1500) the anti-resonant element preforms (300) to the cladding tube wall (210) by introducing heat. According to the invention, the method has the step of e) introducing (1400) a respective contact element (400) into at least one anti-resonant element preform (300) such that the contact element (400) in step d) increases the heat-absorbing mass of the anti-resonant element preform (300) in order to slow the flow of heat from the cladding tube (200) into the anti-resonant element preform (300) during the thermal fixing process (1500).
Described is a process for the production of synthetic fused silica in which the deposition surface is located for a period of at least 50% of the build-up time of the soot body at a burner distance in which the horizontally integrated luminous intensity of the flame of the burner used in the targetless state is still at least ⅔ of the maximum horizontally integrated luminous intensity of the flame.
C03B 37/018 - Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means by glass deposition on a glass substrate, e.g. by chemical vapour deposition
63.
DOPED FUSED SILICA COMPONENT FOR USE IN A PLASMA-ASSISTED MANUFACTURING PROCESS AND METHOD FOR PRODUCING THE COMPONENT
Doped quartz glass components for use in a plasma-assisted manufacturing process contain at least one dopant which is capable of reacting with fluorine to form a fluoride compound, and the fluoride compound has a boiling point higher than that of SiF4. The doped quartz glass component has high dry-etch resistance and low particle formation, and has uniform etch removal when used in a plasma-assisted manufacturing process. The doped quartz glass has a microhomogeneity defined by (a) a surface roughness with an Ra value of less than 20 nm after the surface has been subjected to a dry-etching procedure as specified in the description, or (b) a dopant distribution with a lateral concentration profile in which maxima of the dopant concentration are at an average distance apart of less than 30 μm.
2 particles into a body; and vitrifying the resulting body, wherein a fluorinating agent having a boiling point greater than or equal to −10° C. is supplied to the synthesis burner.
One aspect is a method for producing a multilayered silica glass body. The method involves producing a multilayered silica glass body in which a transparent silica glass layer is provided on the surface of a siliceous substrate made of a siliceous material. The method includes preparing the siliceous substrate, preparing a silica slurry in which silica particles are dispersed in a liquid, applying the silica slurry to the surface of the siliceous substrate, leveling the silica slurry applied to the surface of the siliceous substrate by applying vibration to the siliceous substrate, drying the leveled silica slurry, and vitrifying the dried silica slurry by heating to form a transparent silica glass layer. As a result, a transparent silica glass layer of uniform thickness is obtained at excellent yield, and a method for producing a multilayered silica glass body easily in a short time is provided.
01 - Chemical and biological materials for industrial, scientific and agricultural use
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
19 - Non-metallic building materials
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Chemicals for use in industry; ceramic powder; ceramic
powder as raw material for sintered solid parts; ceramic
powder as raw material for film deposition; metal oxide
powder as raw material; ceramic compositions for sintering;
ceramic granules and powders for sintering; compositions for
the manufacture of technical ceramics; chemical agents for
producing black glass, in particular chemical agents for
producing black glass that is opaque throughout; industrial
chemicals used in industry, science, chemicals and chemical
preparation used in industry, science, and chemical for
products use, not included in other classes. Scientific, measuring, control apparatus and instruments;
laboratory apparatus of fused silica for use in the chemical
industry, the electrical industry, the semiconductor
industry, namely, cuvettes, crucibles, dishes, beakers,
bells, flanges, tubes, poles, plates, catalyst supports;
quartz glass products for optical devices, such as plates,
filters, mirror substrates; signal instruments; measuring
instruments, instrument for lab, electronic measuring
instruments, scientific instruments; glasses and its
accessories; optical instruments; sleeves for holding lenses
or other optical components; anti-glare devices as
accessories for lasers, infrared emitters. Anti-glare devices as accessories for lamps, UV emitters;
apparatus and appliance for lighting, not included in gas
lighters, oil lighters; disinfecting installation. Silica [quartz]; fused silica. Quartz glass and quartz glass fibers (vitreous silica
fibers, not for textile use); fused silica (semi-worked
products, other than for building), and semi-worked products
made therefrom, in particular tubes, poles, plates, blocks;
doped fused silica (semi-worked products, other than for
building), and semi-worked products made therefrom, in
particular tubes, poles, plates, blocks; opaque quartz glass
and opaque quartz glass fibers, not for textile use; opaque
fused silica (semi-worked products, other than for
building), and opaque semi-worked products made therefrom,
in particular tubes, poles, plates, blocks; black opaque
fused silica (semi-worked products, other than for
building), and black opaque semi-worked products made
therefrom, in particular tubes, poles, plates, blocks; raw
or semi-proceed glass, not included in glass for building;
glassware not included in other classes; absorbing
components comprising quartz glass as part or accessories
for lasers [all goods for non-medical purposes]; absorbent
components comprising quartz glass for lamps [electrical];
absorbent components comprising quartz glass as part or
accessories for lasers [all goods for non-medical purposes],
in particular attenuators for laser light or beam dumps for
laser light; substrates comprising quartz glass for mirrors,
in particularly for mirrors used in laser.
09 - Scientific and electric apparatus and instruments
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers and swimmers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus; instruments for diagnosis [for scientific use]; measuring instruments; optical glass; optical glass in the form of discs or of plates, all made of fused silica or of glass; glassware for scientific or laboratory use [specifically adapted]; quartz glass for scientific or laboratory use [specifically adapted]; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for scientific or laboratory use [specifically adapted]; quartz glass in the form of in particular pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for scientific or laboratory use [specifically adapted]; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the chemical industry; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the electrical industry; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the semiconductor industry; optical lenses; mirrors [optics]; optical prisms; optical lenses (parts for lasers, not for medical purposes); optical glass (parts for lasers, not for medical purposes); mirrors [optics] (parts for lasers, not for medical purposes); optical prisms (parts for lasers, not for medical purposes); fiber optic cables; semi-finished cores rods for fiber optic cables; semi-finished cladding cylinders for fiber optic cables; semi-finished end caps for optical fibers; crystal filters; single-crystal silicon wafers; electric cables, wires, conductors and connection fittings therefor; circulators [electric or electronic components]; semiconductor component; silicon chips [electronic components]; optical measuring components. Household or kitchen utensils and containers; cookware and tableware, except forks, knives and spoons; combs and sponges; brushes, except paintbrushes; brush-making materials; articles for cleaning purposes; unworked or semi-worked glass, except building glass; glassware, porcelain and earthenware; vitreous silica fibers, other than for textile use; fused silica [semi-worked product], other than for building; fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; doped fused silica [semi-worked product], other than for building; doped fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; translucent fused silica [semi-worked product], other than for building; translucent fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; opaque fused silica [semi-worked product], other than for building; opaque fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic quartz glass [semi-worked product], other than for building; synthetic quartz glass [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic black quartz glass [semi-worked product], other than for building; synthetic black quartz glass [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic quartz glass fibers, not for textile purposes; quartz glass [unworked or semi-worked], except building glass in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the chemical industry, the electrical industry and the semiconductor industry.
09 - Scientific and electric apparatus and instruments
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers and swimmers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus; instruments for diagnosis [for scientific use]; measuring instruments; optical glass; optical glass in the form of discs or of plates, all made of fused silica or of glass; glassware for scientific or laboratory use [specifically adapted]; quartz glass for scientific or laboratory use [specifically adapted]; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for scientific or laboratory use [specifically adapted]; quartz glass in the form of in particular pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for scientific or laboratory use [specifically adapted]; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the chemical industry; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the electrical industry; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the semiconductor industry; optical lenses; mirrors [optics]; optical prisms; optical lenses (parts for lasers, not for medical purposes); optical glass (parts for lasers, not for medical purposes); mirrors [optics] (parts for lasers, not for medical purposes); optical prisms (parts for lasers, not for medical purposes); fiber optic cables; semi-finished cores rods for fiber optic cables; semi-finished cladding cylinders for fiber optic cables; semi-finished end caps for optical fibers; crystal filters; single-crystal silicon wafers; electric cables, wires, conductors and connection fittings therefor; circulators [electric or electronic components]; semiconductor component; silicon chips [electronic components]; optical measuring components. Household or kitchen utensils and containers; cookware and tableware, except forks, knives and spoons; combs and sponges; brushes, except paintbrushes; brush-making materials; articles for cleaning purposes; unworked or semi-worked glass, except building glass; glassware, porcelain and earthenware; vitreous silica fibers, other than for textile use; fused silica [semi-worked product], other than for building; fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; doped fused silica [semi-worked product], other than for building; doped fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; translucent fused silica [semi-worked product], other than for building; translucent fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; opaque fused silica [semi-worked product], other than for building; opaque fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic quartz glass [semi-worked product], other than for building; synthetic quartz glass [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic black quartz glass [semi-worked product], other than for building; synthetic black quartz glass [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic quartz glass fibers, not for textile purposes; quartz glass [unworked or semi-worked], except building glass in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the chemical industry, the electrical industry and the semiconductor industry.
09 - Scientific and electric apparatus and instruments
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers and swimmers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus; instruments for diagnosis [for scientific use]; measuring instruments; optical glass; optical glass in the form of discs or of plates, all made of fused silica or of glass; glassware for scientific or laboratory use [specifically adapted]; quartz glass for scientific or laboratory use [specifically adapted]; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for scientific or laboratory use [specifically adapted]; quartz glass in the form of in particular pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for scientific or laboratory use [specifically adapted]; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the chemical industry; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the electrical industry; glassware in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the semiconductor industry; optical lenses; mirrors [optics]; optical prisms; optical lenses (parts for lasers, not for medical purposes); optical glass (parts for lasers, not for medical purposes); mirrors [optics] (parts for lasers, not for medical purposes); optical prisms (parts for lasers, not for medical purposes); fiber optic cables; semi-finished cores rods for fiber optic cables; semi-finished cladding cylinders for fiber optic cables; semi-finished end caps for optical fibers; crystal filters; single-crystal silicon wafers; electric cables, wires, conductors and connection fittings therefor; circulators [electric or electronic components]; semiconductor component; silicon chips [electronic components]; optical measuring components. Household or kitchen utensils and containers; cookware and tableware, except forks, knives and spoons; combs and sponges; brushes, except paintbrushes; brush-making materials; articles for cleaning purposes; unworked or semi-worked glass, except building glass; glassware, porcelain and earthenware; vitreous silica fibers, other than for textile use; fused silica [semi-worked product], other than for building; fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; doped fused silica [semi-worked product], other than for building; doped fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; translucent fused silica [semi-worked product], other than for building; translucent fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; opaque fused silica [semi-worked product], other than for building; opaque fused silica [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic quartz glass [semi-worked product], other than for building; synthetic quartz glass [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic black quartz glass [semi-worked product], other than for building; synthetic black quartz glass [semi-worked product], other than for building in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves; synthetic quartz glass fibers, not for textile purposes; quartz glass [unworked or semi-worked], except building glass in the form of pipes, tubes, bars, rods, plates, blocks, ingots, rings, preforms or sleeves for use in the chemical industry, the electrical industry and the semiconductor industry.
71.
METHOD FOR DETERMINING THE REFRACTIVE-INDEX PROFILE OF A CYLINDRICAL OPTICAL OBJECT
The invention relates to a method for determining an index-of-refraction profile of an optical object (22), which has a cylindrical surface (26) and a cylinder longitudinal axis (25), said method comprising the following method steps: (a) scanning the cylindrical surface (26) of the object (22) at a plurality of scanning locations (23) by means of optical beams (21) which are incident perpendicularly to the cylinder longitudinal axis (25); (b) capturing, by means of an optical detector (7; 8), a location-dependent intensity distribution of the optical beams (21) deflected in the optical object (22); (c) determining the angles of deflection of the zero-order beams for each scanning location (23) from the captured intensity distribution, comprising eliminating beam intensities of higher-order beams from the intensity distribution so that an angle-of-deflection distribution is obtained for the zero-order beams, and (d) calculating the index-of-refraction profile of the object (22) on the basis of the angle-of-deflection distribution, wherein method steps (a) and (b) are carried out with light beams having at least two different wavelengths and, in order to eliminate beam intensities of higher-order beams, same-location intensities of the intensity distributions for the different wavelengths are mathematically processed with each other, more particularly multiplied by and/or added to each other.
Known heating burners for producing a welded joint between components of quartz glass include a burner head in which at least one burner nozzle is formed, a burner-head cooling system for the temperature control of the burner head and a supply line connected to the burner nozzle for a fuel gas. Starting from this, to modify a heating burner in such a way that impurities in the weld seam between quartz-glass components to be connected are largely avoided, it is suggested that the burner head should include a base body of silver or of a silver-based alloy.
01 - Chemical and biological materials for industrial, scientific and agricultural use
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Chemicals for use in industry; Ceramic powders used in manufacturing; Ceramic powders used in manufacturing, namely, as raw material for sintered solid parts; Ceramic powders used in manufacturing, namely, as raw material for film deposition; Metal oxide powders for industrial purposes, namely, for use as raw material in manufacturing; Ceramic compositions for sintering, namely, as engineered ceramic and composite materials for heat transfer or thermal management applications or plasma etch applications; Ceramic granules and powders for sintering, namely, as engineered ceramic and composite materials for heat transfer or thermal management applications or plasma etch applications Absorbing components as part or accessories for lasers, namely, mirror substrates, beam dumbs, ferrules for stray light suppression, attenuators for power measurement, each of the above goods not for medical purposes; Products of fused silica for use in the chemical industry, the electrical industry, the semiconductor industry and for laboratory purposes, namely, cuvettes, crucibles, dishes, beakers, bells, flanges, tubes, poles, plates, catalyst supports; Quartz glass products for optical devices, such as plates, filters, mirror substrates; Optical apparatus and instruments, namely, attenuators for laser beams; optical components, namely, substrates as mirrors for use in lasers; sleeves for holding glasses and contact lenses Light absorbing components for lamps, namely, mirror substrates, beam dumbs, ferrules for stray light suppression, attenuators for power measurement; anti-glare devices as accessories for lasers, lamps, infrared emitters, UV emitters; disinfectant apparatus for disinfection liquids and surfaces by means of UV light Articles made from fused quartz glass and quartz glass fibers, namely, tubes, poles, plates, blocks, pipes, bars, rods, ingots, rings, preforms, not for textile use; Fused silica as a semi-finished products, other than for construction, namely, tubes, poles, plates, blocks, pipes, bars, rods, ingots, rings, preforms, all for general industrial and further manufacturing use; Doped fused silica as a semi-finished products, other than for construction, namely, tubes, poles, plates, blocks, pipes, bars, rods, ingots, rings, preforms, all for general industrial and further manufacturing use; Articles made from fused opaque silica, namely, tubes, poles, plates, blocks, pipes, bars, rods, ingots, rings, preforms, all for general industrial and further manufacturing use; Articles made from fused black silica, namely, tubes, poles, plates, blocks, pipes, bars, rods, ingots, rings, preforms, all for general industrial and further manufacturing use
74.
HEAT-REFLECTING MEMBER, AND METHOD FOR MANUFACTURING GLASS MEMBER HAVING HEAT-REFLECTING LAYER INCLUDED THEREIN
Provided are: a heat-reflecting member which can keep high reflectivity, cannot be broken even under high-temperature environments during the manufacturing and use thereof, does not generate dusts upon use, and can be washed with a chemical solution; and a method for manufacturing a glass member having a heat-reflecting layer included therein and suitable as the heat-reflecting member. A heat-reflecting member having such a laminated structure that quartz glass layers are formed respectively on the upper surface and the lower surface of a siliceous sintered powder layer, wherein, in a part of the siliceous sintered powder layer which is positioned at an edge part of the heat-reflecting member, at least a non-permeable layer and a buffer layer are provided, the non-permeable layer has a thickness larger than 1/2 of the thickness of the siliceous sintered powder layer and cannot be permeated by a gas or a liquid, and the buffer layer is arranged between the non-permeable layer and the siliceous sintered powder layer and has a density that changes in the direction from the non-permeable layer toward the sintered powder layer.
Provided is a reflective member which does not generate dust when used, has high fracture toughness, and allows damage to be prevented in a high temperature environment during production and during use while maintaining high reflectivity. Also provided is a production method for a glass layered member suitable as the reflective member. The reflective member has a layered structure comprising a non-transparent siliceous sintered powder layer having an upper surface and lower surface on which a transparent quartz glass member is formed. The thickness of the non-transparent siliceous sintered powder layer is 0.1 mm or thicker. The film thickness distribution is ±0.05 mm or less. When a load is applied, in a parallel direction to the layered structure, onto the transparent quartz glass member on the upper surface and on the lower surface of the layered structure, the fracture load is 5 N or greater per 1 cm2. At the boundaries between the non-transparent siliceous sintered powder layer and the transparent quartz glass member of the layered structure, the width of a half-transparency section where the non-transparency is between that of the non-transparent siliceous sintered powder layer and the transparent quartz glass member is 0.01 mm or less.
Methods for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner shell region surrounding the hollow core and comprising a plurality of anti-resonant elements, are known. The known methods comprise the method steps: providing a jacket tube, which has a jacket-tube internal bore and a jacket-tube longitudinal axis along which a jacket-tube wall delimited by an interior and an exterior extends; providing tubular anti-resonant-element preform pieces; mounting the anti-resonant-element preform pieces at target positions on the interior of the jacket-tube wall, thus forming a primary preform which has a hollow core region and a shell region; elongating the primary preform to form the hollow-core fiber, or processing the primary preform further to form a secondary preform. In order to achieve, proceeding therefrom, high precision and exact positioning of the anti-resonant elements in a sufficiently stable and reproducible way, according to the invention, at least some of the provided anti-resonant-element preform pieces form a joined composite of a plurality of structural elements nested in each other, which joined composite comprises at least one ARE outer tube and at least one nested ARE inner tube connected to the inner lateral surface of the ARE outer tube, at least the ARE outer tube having an oval cross-section.
The present invention relates to a process for preparing a silicone dioxide suspension containing the following method steps: providing a silicone dioxide powder and a liquid; mixing the silicone dioxide powder with the liquid to obtain a slurry; treating the slurry with ultrasound to obtain a precursor suspension; guiding at least a part of the precursor suspension through a first multi-stage filter device, wherein the first multi-stage filter device comprises at least a first, a second and a third filter stage, each filter stage including at least one filter, wherein the second filter stage is arranged downstream of the first filter stage and the third filter stage is arranged downstream of the second filter stage, the first filter stage having a filter fineness of 5 μm or more, the second filter stage having a filter fineness in a range from 0.5 to 5 μm, the third filter stage having a filter fineness of 1 μm or less, and wherein at least one of the filter stages selected from the first, second and third filter stages has a deposition rate of 99.5 % or more. The invention also relates to a silicone dioxide suspension obtained in this way and to granulates and secondary products that can be produced therefrom.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that a secondary preform is formed which has an outer diameter ranging from 30 to 90 mm, and at least one of the end faces of the anti-resonant element preforms is closed prior to drawing the fiber.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and further processing the primary preform in order to form a secondary preform, including a process of elongating the primary preform in order to directly form the hollow-core fiber or to form the secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that a primary preform with an outer diameter ranging from 20 to 70 mm is used for the elongation process.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved by providing anti-resonant element preforms which have at least one respective ARE outer tube and/or at least one respective ARE inner tube, wherein the ARE outer tube and/or the ARE inner tube is produced using a vertical drawing method without molding tools.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that the step of providing the cladding tube includes a processing measure, in which the cladding tube wall is machined with a longitudinal structure extending in the direction of the cladding tube longitudinal axis in the region of the target positions.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; forming a number of precursors for anti-resonant elements at target positions of the cladding tube wall; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform from which the hollow-core fiber is drawn. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that the formation of the anti-resonant element precursors includes the formation of elongated pressure chambers, each of which adjoins a wall that can be deformed under pressure and heat in the region of the target positions of the anti-resonant elements and which cause a section of the deformable wall to protrude in the direction of the cladding tube inner bore under the effect of pressure and heat, thereby forming an anti-resonant element or a precursor for same, while carrying out a process according to step (c).
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; further processing the primary preform in order to form a secondary preform, including an elongation process; and drawing the secondary preform in order to form the hollow-core fiber. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that while the primary preform is being elongated, at least some of the formerly tubular anti-resonant element preforms of the primary preform are provided with an oval outer cross-sectional shape by generating and maintaining the same internal pressure in the hollow core region and in the tubular anti-resonant element preforms.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that a positioning template is inserted into the cladding tube inner bore in order to arrange the anti-resonant element preforms, said template having holding elements for positioning the anti-resonant element preforms at the target positions.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that a cladding tube is provided with an outer diameter ranging from 90 to 250 mm and a length of at least 1 m; tubular structural elements are provided, at least some of which have a wall thickness ranging from 0.2 to 2 mm and a length of at least 1 m; and the structural elements are arranged in the cladding tube inner bore while the cladding tube longitudinal axis is vertically oriented, the upper end face of each structural element being positioned at the target position.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that while carrying out a process according to step (c), components of the primary preform made of quartz glass and/or parts surrounding the primary preform made of quartz glass are heated and softened together, wherein the quartz glass of at least one of the preform components and/or the quartz glass of at least one of the parts surrounding the preform contains at least one dopant which decreases or increases the viscosity of quartz glass.
Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; and elongating the primary preform in order to form the hollow-core fiber or further processing the primary preform in order to form a secondary preform. The aim of the invention is to achieve a high degree of precision and an exact positioning of the anti-resonant elements in a sufficiently stable and reproducible manner on the basis of the aforementioned methods. This is achieved in that while further processing the primary preform according to step (c), an external layer cylinder is used which has a radial viscosity profile such that the viscosity increases towards the interior of the external layer cylinder.
Described is a process for the refinement of a quartz powder, comprising the step of separating microparticles of refractory minerals, in particular minerals containing rare earth metal compounds, from the quartz powder by an elutriation step.
C22B 60/02 - Obtaining thorium, uranium or other actinides
C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
B03B 5/62 - Washing granular, powdered or lumpy materialsWet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
C01B 33/12 - SilicaHydrates thereof, e.g. lepidoic silicic acid
Known method for producing a three-dimensional glass object comprises the steps of shaping a glass fibre, wherein the glass fibre provided with a protective sheath is continuously fed to a heating source, the protective sheath is removed under the influence of heat and the glass fibre is softened. According to the invention, in order to facilitate the production of filigree or optically distortion-free and transparent glass objects as much as possible and in particular to enable the adjustment of optical and mechanical properties with high spatial resolution, the glass fibre has a protective sheath with a layer thickness in the region of between 10 nm to 10 µm.
B29C 64/118 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
B29C 64/135 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
01 - Chemical and biological materials for industrial, scientific and agricultural use
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
19 - Non-metallic building materials
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Chemicals for use in industry; Ceramic powder; Ceramic powder as raw material for sintered solid parts; Ceramic powder as raw material for film deposition; Metal oxide powder as raw material; Ceramic compositions for sintering; Ceramic granules and powders for sintering; Compositions for the manufacture of technical ceramics; Chemical agents for producing black glass, in particular chemical agents for producing black glass that is opaque throughout; Industrial chemicals used in industry, science, Chemicals and chemical preparation used in industry, science, and chemical for products use, not included in other classes. Scientific, measuring, control apparatus and instruments; Laboratory apparatus of fused silica for use in the chemical industry, the electrical industry, the semiconductor industry, namely, cuvettes, crucibles, dishes, beakers, bells, flanges, tubes, poles, plates, catalyst supports; Quartz glass products for optical devices, such as plates, filters, mirror substrates; Signal instruments; Measuring instruments, instrument for lab, electronic measuring instruments, scientific instruments; Glasses and its accessories; Optical instruments; Sleeves for holding lenses or other optical components; Anti-glare devices as accessories for lasers, infrared emitters. Anti-glare devices as accessories for lamps, UV emitters; Apparatus and appliance for lighting, not included in gas lighters, oil lighters; Disinfecting installation. Silica [quartz]; fused silica. Quartz glass and quartz glass fibers (vitreous silica fibers, not for textile use); Fused silica (semi-worked products, other than for building), and semi-worked products made therefrom, in particular tubes, poles, plates, blocks; Doped fused silica (semi-worked products, other than for building), and semi-worked products made therefrom, in particular tubes, poles, plates, blocks; Opaque quartz glass and opaque quartz glass fibers, not for textile use; Opaque fused silica (semi-worked products, other than for building), and opaque semi-worked products made therefrom, in particular tubes, poles, plates, blocks; black opaque fused silica (semi-worked products, other than for building), and black opaque semi-worked products made therefrom, in particular tubes, poles, plates, blocks; raw or semi-proceed glass, not included in glass for building; glassware not included in other classes; Absorbing components comprising quartz glass as part or accessories for lasers [all goods for non-medical purposes]; Absorbent components comprising quartz glass for lamps [electrical]; absorbent components comprising quartz glass as part or accessories for lasers [all goods for non-medical purposes], in particular attenuators for laser light or beam dumbs for laser light; Substrates comprising quartz glass for mirrors, in particularly for mirrors used in laser.
93.
Method for treating pourable, inorganic grain, and rotary tube suitable for performing the method
2 grain in the rotary kiln, in a manner having low and effective consumption of treatment gas, it is proposed for spent treatment gas to be suctioned out of a reaction zone of the treatment chamber, by a gas manifold that rotates about the longitudinal axis thereof.
F27B 7/36 - Arrangements of air or gas supply devices
F27D 3/00 - ChargingDischargingManipulation of charge
F27D 7/06 - Forming or maintaining special atmospheres or vacuum within heating chambers
F27B 7/02 - Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
B01J 8/08 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles
B01J 8/10 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles
2/g, making a glass melt out of silicon dioxide granulate in an oven and making a quartz glass body out of at least part of the glass melt. The oven has at least a first and a further chamber connected to one another via a passage. The temperature in the first chamber is lower than the temperature in the further chambers. On aspect relates to a quartz glass body which is obtainable by this process. One aspect relates to a light guide, an illuminant and a formed body, which are each obtainable by further processing of the quartz glass body.
Provided is a titanium-containing quartz glass having excellent UV absorption, wherein the quartz glass absorbs ultraviolet rays having a wavelength of 250 nm or less, ozone generation-related adverse effects on the human body, etc., are prevented, a decrease in transmittance of the quartz glass in the range from near-ultraviolet to visible light due to being colored when irradiated with ultraviolet rays does not occur, absorption build-up or lamp burst-inducing deformation build-up, which is caused by a structural change in the quartz glass that occurs in the range of 200-300 nm when irradiated with ultraviolet rays, is suppressed, and a decrease in transmittance at intended wavelength ranges does not occur even when exposed to ultraviolet rays. The titanium-containing quartz glass having excellent UV absorption is colorless, wherein the average concentration of titanium is 10-500 ppm, the concentration of OH group is 10-350 ppm, each elemental concentration of Al, Li, Na, K, Ca, Mg, Fe, Ni, Cu, Cr, Mo, and V is 50 ppb or less (150 ppb or less in total), and the concentration of chlorine is less than 30 ppm.
4aa of less than 20 nm when the surface has undergone a dry-etch procedure specified in the description, and/or (b) by a dopant distribution having a lateral concentration profile in which maxima in the dopant concentration have a mean spacing of less than 30 µm from one another.
2 is inserted into a sheath tube composed of glass, which has a longitudinal axis and an inner bore, and is thermally treated therein. In order to subject the intermediate product to a thermal and/or reactive treatment that is reproducible and uniform in its effect from this starting point, it is proposed in one embodiment that into the sheath tube's inner bore a first gas-permeable gas diffuser is inserted which is displaceable along the sheath tube's longitudinal axis and is pressed against the intermediate product during the thermal treatment.
An apparatus and related process for producing a high-strength weld between two glass components. Chucks clamp and move respective first ends of the glass components toward each other inside an enclosure, where the second ends are heated, softened, and welded together in a weld zone. The enclosure has layers of stacked quartz glass bricks and allows the weld zone to cool slowly and avoid stress. A propane quartz melting torch directs a flame inside the enclosure and toward the second ends as the glass components move toward each other. The flame softens the second ends and creates substantially smooth polished surfaces in the weld zone having an increased hydroxide content. At least 80% of the weld zone has a hydroxide content greater than about 10 ppm average in a 10 μm depth from the surface and the tensile strength of the weld zone is above about 10 MPa.
A known method for homogenizing glass includes the following steps: providing a cylindrical blank composed of the glass, having a cylindrical outer surface which extends between a first end face and a second end face, forming a shear zone in the blank by softening a longitudinal section of the blank and subjecting it to a thermal-mechanical intermixing treatment, and moving the shear zone along the longitudinal axis of the blank. To reduce the risk of cracks and fractures during homogenizing, it is proposed that a thermal radiation dissipator is used that at least partially surrounds the shear zone, the lateral dimension of which in the direction of the longitudinal axis of the blank is greater than the shear zone and smaller than the length of the blank, the thermal radiation dissipator being moved synchronously with the shear zone along the longitudinal axis of the blank.
C03B 32/00 - Thermal after-treatment of glass products not provided for in groups , e.g. crystallisation, eliminating gas inclusions or other impurities
C03B 5/183 - Stirring devicesHomogenisation using thermal means, e.g. for creating convection currents
C03B 20/00 - Processes specially adapted for the production of quartz or fused silica articles
A method for homogenizing glass includes the method: providing a cylindrical blank composed of the glass having a cylindrical outer surface that extends along a longitudinal axis of the blank between a first end face and a second end face, forming a shear zone in the blank by softening a longitudinal section of the blank and subjecting it to a thermal-mechanical intermixing treatment, and displacing the shear zone along the longitudinal axis of the blank. To enable a radial mixing within the shear zone in addition to the tangential mixing with the lowest possible time and energy input, starting from this method, cylindrical sections of the blank are adjacent to the shear zone on both sides, the first cylindrical section having a first central axis and the second cylindrical section having a second central axis, the first central axis and the second central axis being temporarily non-coaxial with each other.
C03B 9/36 - Blow headsSupplying, ejecting, or controlling the air
C03B 9/38 - Means for cooling, heating, or insulating glass-blowing machines
C03B 17/04 - Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles
C03B 32/00 - Thermal after-treatment of glass products not provided for in groups , e.g. crystallisation, eliminating gas inclusions or other impurities
