The invention relates to a color-enhancing polarizing multilayer film (1) comprising: —a polarizing layer (12) having a front face and a back face; —a first protective layer (11); —a second protective layer (13); and —one or more isotropic dyes comprised in at least one of the first or second protective layers; wherein the first protective layer is placed on the front face of the polarizing layer and the second protective layer is placed on the back face of the polarizing layer and wherein the one or more isotropic dyes represent at least 90 wt. %, preferably at least 95 wt. %, still preferably at least 99 wt. %, of the total content of dyes comprised in the first and second protective layers.
A spectacle lens comprising an arrangement of micro-optical elements, each micro-optical element having an micro-optical axis and a micro-optical face. The micro-optical face has a shape presenting a first altitude first-order gradient defined as a gradient of a distance from a section of the micro-optical face of the micro-optical element in a first axial plane to a micro-optical reference radial plane perpendicular to the micro-optical axis, and a second altitude first-order gradient defined as a gradient of a distance from a section of the micro-optical face of the micro-optical element in a second axial plane to the micro-optical reference radial plane perpendicular to the micro-optical axis. The first and second altitude first-order gradients have each a maximum higher than 1.5 μm/mm in absolute terms and a minimum higher than 1.5 μm/mm in absolute value.
A lens element comprising: —a refractive area configured to provide a refractive power, —a plurality of at least twenty optical elements having a transparent optical function of not focusing an image on the retina of the eye of the wearer when the lens element is worn in standard wearing conditions, wherein at least two reference optical elements from the plurality of optical elements are on either side of a reference point of the lens element and standout from the plurality of optical elements.
A calculation module, system, and computer-implemented method for determining at least one cause of a visual fatigue of a patient. The calculation module obtains values associated respectively with physiological parameters of the patient, obtains causality coefficients associated respectively with the physiological parameters, normalizes the values to obtain normalized values associated respectively with the physiological parameters, determines normalized scores associated respectively with the physiological parameters, based on the causality coefficients and the normalized values, and selects at least one of the physiological parameters, using the normalized scores, as the at least one cause of the visual fatigue.
A61B 5/16 - Devices for psychotechnicsTesting reaction times
G16H 20/70 - ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to mental therapies, e.g. psychological therapy or autogenous training
5.
METHOD FOR SELECTING A LENS HAVING A SPECIAL LIGHT TRANSMISSION FILTER
ECOLE NATIONALE DES TRAVAUX PUBLICS DE L'ETAT (France)
Inventor
Dubail, Marie
Raza, Aiman
Ponot, Solange
Dumortier, Dominique
Jost, Sophie
Abstract
The invention relates to a selecting method for selecting a lens amongst predetermined lenses having distinct light transmission filters, depending on an environment in which said lens is to be used, comprising steps of: —providing at least one image of said environment, —identifying a predetermined number of main colors on said at least one image, —estimating a first value of at least a color component for each main color, —determining a modified color corresponding to said main color seen through a first of said predetermined lenses, —calculating a second value of said color component for each modified color, —repeating the determining and calculating steps for each of the other predetermined lenses, —comparing, for each main color, said first value to each second value, and—deducing therefrom a selected lens.
The invention relates to a method for measuring at least one geometrico-morphological parameter of a subject (2) wearing an eyewear (3) in order to fit an ophthalmic lens in said eyewear. The method comprises the following steps: - placing the subject wearing the eyewear in a natural posture while looking at a visual symbol (17) among a plurality of visual symbols (9) on a visual target (6), - placing a double-sided image capture apparatus (5) between the subject and the visual target, with a first image capture device (10) facing the subject, a second image capture device (11) facing the visual target, - obtaining images of both the subject and visual target thanks to the double-sided image capture apparatus (5), - determining at least one first point (18) and at least one second point (19) from each of the images, - identifying the visual symbol, - determining the at least one geometrico-morphological parameter using the at least one first and second points and the identification of the visual symbol. The invention also relates to an associated system and a fitting method.
A61B 3/11 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for measuring interpupillary distance or diameter of pupils
A61B 5/107 - Measuring physical dimensions, e.g. size of the entire body or parts thereof
A61B 3/113 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining or recording eye movement
A61B 3/032 - Devices for presenting test symbols or characters, e.g. test chart projectors
The disclosure relates to a system for determining an addition intended to be used for manufacturing a lens element for a potential wearer, the system comprising: a processor (60); and a memory (61) storing instructions that, when executed by the processor, cause the processor to: determine (52) an addition value, ADD, using a relation of the form ADD = EXP(ƒ), where ƒ is a linear function including at least one variable representing a characteristic of the potential wearer.
The invention relates to a method of curing a polythiourethane-based transparent casted substrate, comprising the steps of providing a first component A comprising a polythiourethane pre-polymer having iso(thio)cyanate end groups, said pre-polymer having been prepared from at least one polythiol monomer and at least one polyiso(thio)cyanate monomer, used in amounts adapted so that the molar ratio R2 of NCX/SH groups ranges from 2 to 35, providing a second component B comprising at least one polythiol monomer, mixing together first and second components A and B and filling a molding cavity with the resulting polymerizable mixture, curing said polymerizable mixture to obtain a polythiourethane-based transparent substrate, wherein said pre-polymer has been prepared by mixing said at least one polyiso(thio)cyanate monomer and said at least one polythiol monomer in initial amounts such that the initial molar ratio R1 of NCX/SH groups for said monomers ranges from 0.3 R2 to 0.95 R2, polymerizing the mixture, and adding to the mixture an additional amount of at least one polyiso(thio)cyanate monomer such that the molar ratio of NCX/SH groups for all the monomers used in the preparation of said pre-polymer is equal to R2, X being O or S.
The invention provides a computer-implemented method for determining a lens for a user, the method comprising the following steps: − providing (100) a first set of data comprising a plurality of first values of at least one ophthalmic parameter; − providing (200) a second set of data comprising a plurality of second values of said at least one ophthalmic parameter; − gathering (300) the first and second sets of data into a general set of data, − determining (400) skewness and kurtosis of said general set of data based on said first and second sets of data, − determining (500) an age distribution by centile of said at least one ophthalmic parameter based on determined skewness and Kurtosis, and the first and second sets of data, − determining (600) a lens for a user based on said age distribution by centile of said at least one ophthalmic parameter.
G16H 50/30 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for calculating health indicesICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for individual health risk assessment
A61B 3/00 - Apparatus for testing the eyesInstruments for examining the eyes
CORPORATION DE L’ECOLE POLYTECHNIQUE DE MONTREAL (Canada)
ESSILOR INTERNATIONAL (France)
Inventor
Poirie, Thomas
Schmitt, Thomas
Martinu, Ludvik
Klemberg-Sapieha, Jolanta
Scherer, Karin
Trottier-Lapointe, William
Dehoux, Anita
Abstract
The invention concerns an article comprising a nanolaminate coating, wherein the nanolaminate coating has a total thickness ranging from 20 to 500 nm and comprises at least one pair of layers constituted of adjacent first and second layers and a minimum of three layers, said first layer being an inorganic silica layer obtained by evaporation of silicon oxide, especially evaporation of SiO2, and the second layer being a silicon-based organic-inorganic layer obtained by deposition of an organosilicon compound or a mixture of organosilicon compounds under plasma or ionic assistance, and wherein the refractive index of the nanolaminate coating as a whole is lower than 1.58 at 550 nm.
C23C 14/30 - Vacuum evaporation by wave energy or particle radiation by electron bombardment
C23C 16/30 - Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
C23C 16/48 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating by irradiation, e.g. photolysis, radiolysis, particle radiation
G02B 1/111 - Anti-reflection coatings using layers comprising organic materials
11.
Machine for Machining of Optical Workpieces made of Plastic, in Particular Spectacle Lenses
A machine for machining, in particular, spectacle lenses made of plastic, having two workpiece surfaces and a workpiece edge therebetween, comprises a first machining station for machining a spectacle lens at the workpiece edge by a first tool, a second machining station for wet machining of the spectacle lens on one of the workpiece surfaces by a second tool, and a movement device arranged functionally between the machining stations for positioning a workpiece holding head at the respective machining station, which movement device is capable of holding the workpiece without a block piece. Here, the machining stations have first and second work spaces which are separate from one another and are each encapsulated with respect to the surroundings. The first machining station furthermore has a housing which specifically delimits the first work space, and is adapted for substantially dry machining of the workpiece at the workpiece edge.
B24B 13/00 - Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other workAccessories therefor
B24B 13/005 - Blocking means, chucks or the likeAlignment devices
B24B 55/06 - Dust extraction equipment on grinding or polishing machines
B24B 57/02 - Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
System for manufacturing an optical device (10), the system being configured for: - applying a hydrophobic coating over at least a central region (24) of a surface (12B, 14A) of a lens (12, 14), - machining a peripheral edge (20) of the lens (12, 14), - applying an adhesive (26) on a region (22) of the surface (12B, 14A) of the lens (12, 14) and/or on a corresponding region of the optical element (16), and fixing an optical element (16) to the lens (12, 14) with the adhesive (26).
A spectacle lens which provides comfortable vision over an entire range from a long distance to a short distance including intermediate distances therebetween, and to provide spectacles having the same. A lens disclosed herein is configured such that its power is highest in a predetermined portion near the center thereof and is smoothly and gradually reduced outward therefrom.
System, head-mountable device and method for determining a value of a physiological parameter of an individual System, head-mountable device and method for determining a value of a physiological parameter of an individual. The system comprises a head-mountable device intended to be worn by the individual. The head-mountable device comprises a first set of at least one sensor and a second set of at least one sensor. The at least one sensor of the first set comprises at least one LED and at least one photodiode. The at least one LED is arranged, so that light emitted by the at least one LED is reflected by the face of the individual and received by the at least one photodiode. Values outputted by the at least one sensor of the first set depend on an amount of the light received by the at least one photodiode. Values outputted by the at least one sensor of the second set depend on a distance between the face of the individual and the head-mountable device. The system is configured to determine the value of the physiological parameter of the individual based on values outputted by the at least one sensor of the first set and the values outputted by the at least one sensor of the second set.
An accessory device for testing a subject's eye in conditions of near or intermediate vision, to be used with an optometry device for measuring a subjective value of refraction of the eye, the optometry device comprising: a refraction test unit having an optical component for providing different refraction powers to the eye of the subject during a subjective refraction test, and a display adapted to produce a visual target for the subject's eye, an image of the visual target being visible through the refraction test unit along a reference observation direction, the accessory device comprising an optical part configured to be mounted on the refraction test unit of the optometry device, comprising an optical system configured to deviate the image of the visual target from the reference observation direction towards an inclined observation direction along which the image of the visual target is visible through the refraction test unit.
The invention relates to a method for manufacturing an ophthalmic article having at least one microstructured surface, and to an ophthalmic article obtained by this method. The method is for manufacturing an ophthalmic article having front and rear main surfaces, at least one of which is a microstructured surface, and comprises: a) Providing an ophthalmic substrate (10) with a substrate surface which is either hydrophobic or hydrophilic; b) Patterning the substrate surface to create thereon a surface wettability pattern comprising a two-dimensional array of distant hydrophilic micro-areas and of at least one hydrophobic zone which separates the hydrophilic micro-areas from each other; c) Coating the two-dimensional array with a hydrophilic liquid able to form an abrasion-resistant coating in a dried and/or cured state, to form distant droplets (D) of the hydrophilic liquid which are anchored to the hydrophilic micro-areas by wettability thereof; and d) Drying and/or curing the droplets (D) of the hydrophilic liquid, to generate therefrom a three-dimensional array of micro-lenses forming the at least one microstructured surface.
A spectacle lens and a computer-implemented method for determining a spectacle lens. The spectacle lens includes at least a first zone including a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of the first zone, and a second zone including a plurality of micro-optical elements arranged to cover at least 30 percent of the total area of the second zone, the first zone being different from the second zone. The micro-optical elements of the first and second zones are arranged such that for a predetermined range of spatial frequencies, values of a modulation transfer function of the first zone and values of a modulation transfer function of the second zone differ by less than 40%.
This device (10) for clamping any ophthalmic lens (12) including non-circular lenses, comprises: a supporting structure (14) having an opening (16) adapted for introducing a lens (12) therein; at least four arms (18) adapted to clamp the lens (12), each of the arms (18) being rotatable around a respective arm rotation shaft (180) fixed on the supporting structure (14) around the opening (16) and perpendicular to the arm (18) and to the supporting structure (14), the arms (18) being positioned so as to surround the opening (16), each of the arms (18) having an internal part (182) and an external part (184) opposite the internal part (182) with respect to the respective arm rotation shaft (180), the internal part (182) being closer than the external part (184) to a barycenter of the arms (18); a synchronization ring (20) having a respective link with the external part (184) of each of the arms (18) and being adapted to synchronize a movement of the arms (18).
A method of heating an optical element (10) uses a laser beam (B′) and a beam shaping device (2). The beam shaping device is adapted with respect to geometry parameters of the optical element for providing the laser beam with a transverse power distribution (P(r)) such that irradiation of a surface(S) of the optical element causes a temperature of said surface to increase up to a maximum temperature distribution that is substantially uniform throughout said surface. Such heating method provides improved temperature uniformity and allows reduced unit process time. It may be used for tinting an eyeglass, relaxing stresses within a preformed film structure, or cross-linking a varnish layer intended to form a hard coat on an eyeglass.
B23K 103/00 - Materials to be soldered, welded or cut
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
20.
PRISMATIC MICROLENSES ON PAL FOR CORRECTION CONTRIBUTION
A lens element adapted for a wearer and intended to be worn in front of an eye of a wearer in standard viewing conditions, the lens element having a refraction area including a far-distance vision zone having a first refractive power, a near distance vision zone having a second refractive power, an intermediate-distance vision zone, and having a refractive power continuously varying from the first to the second refractive power, at least a first set of optical elements having at least a third refractive power and being superimposed on one of the far, intermediate, or near distance vision zone, the combination of the first set of optical elements with the refraction area providing an optical function adapted for the wearer to focus, in central vision, an image on the retina of the wearer when said wearer gazes at the object through the at least one first set of optical elements.
Machines for the surfacing of spectacle lenses made from mineral glass or organic glass, as well as parts thereof, namely, CNC (computer numerical control) controlled machines for polishing of ophthalmic surfaces of ophthalmic lenses; machine-driven tools for polishing spectacle and ophthalmic lenses and parts and accessories thereof, namely, form machine tools for polishing optical parts with bound and loose abrasive, polishing base, polishing pads, polishing discs, polishing foils, polishing cloth and polishing felt.
22.
DETERMINATION OF AN OPTICAL LENS MACHINING PROCESS SIGNATURE
System for determining a signature of an optical lens machining process, the system being configured to:—determine: • at least two error maps associated respectively with at least two optical lenses machined using the optical lens machining process, • at least one surfacing defect in a first of the at least two error maps, • at least one surfacing defect in a second of the at least two error maps,—remove from the first of the at least two error maps the at least one surfacing defect in the first of the at least two error maps to obtain a first updated error map,—remove from the second of the at least two error maps the at least one surfacing defect in the second of the at least two error maps to obtain a second updated error map, —determine the signature of the optical lens machining process by averaging at least the first updated error map and the second updated error map.
The invention relates to a process for generating a machining setpoint for bevelling an ophthalmic lens to be fitted into a bezel (16) of a rim (11) of an eyeglass frame 10), said process comprising:—a step of acquiring frame parameters relative at least to the shape of a longitudinal contour of the bezel,—a step of acquiring lens parameters relative at least to the shape of the ophthalmic lens, and—a step of deducing therefrom the machining setpoint, said machining setpoint defining an inclination angle for a bevel to be machined on an edge of the ophthalmic lens. According to the invention, said inclination angle is determined as a function of the lens parameters and the frame parameters.
B24B 9/14 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
A computer-implemented method for designing a contact lens, the method including, for a first zone of the contact lens, determining a value of at least one optical feature of at least one micro-optical element superimposed on the contact lens in the first zone based on a first comparison between a first optical function of the contact lens calculated throughout a first area of the contact lens and a first target optical function, and, for a second zone of the contact lens, determining a value of at least one optical feature of at least one micro-optical element superimposed on the contact lens in the second zone based on a second comparison between a second lens optical function of the contact lens calculated throughout a second area of the contact lens and a second target optical function.
The disclosure relates to a method of manufacturing an ophthalmic device including providing a plastic part having a predetermined shape consistent with its deployment in an ophthalmic application, the plastic part having a first face and a second face; providing a mineral part having a first face and a second face; assembling an ophthalmic blank from the plastic part and the mineral part, wherein the second face of the plastic part is coincident with some or all of the first face of the mineral part; positioning and securing the ophthalmic blank on a mount of a machining device; machining on the mount using a tool, the first face of the plastic part.
The invention relates to a lens element intended to be worn in front of an eye of a wearer comprising: —a substrate (3) with a front face (3F) and a rear face (3R), —structure/-s to be masked (9), wherein the lens element (1) further comprises a masking medium (15) disposed upfront the structure/-s to be masked (9), the masking medium (15)—presenting absorbing properties defined by a visual absorption parameter Av within a range of 5%-25%, wherein the mean absorption is defined Av=100%−Tv−Rv*tot and—providing the lens element (1) with, sole or in combination: o a front face visual reflectance Rv<2.3%, and/or o a front face reflected colour saturation Suv<1.8.
The invention concerns an apparatus (200) for determining refraction error of at least an eye (1) of a subject, the apparatus comprising a corrective system (110) comprising a variable power optical system, a measurement system of the refraction error of said eye comprising a light source (31), an illumination optical system (33) adapted to direct the light beam towards the eye (1) of the subject so as to form a reflected light beam (34), an image detection system (35), and a beam splitter (10) adapted to direct the reflected light beam (34) towards the image detection system (35), the beam splitter (10) enabling simultaneously the user to see a target scene through the optical beam splitter (10) and the variable power optical system and a computing system comprising an image processing system adapted to process said image and deduce therefrom a measurement of the refraction error of said eye.
A61B 3/103 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
A61B 3/14 - Arrangements specially adapted for eye photography
28.
SYSTEM, METHOD AND COMPUTER PROGRAM FOR DETECTING AND CONFIRMING AN EMOTION OF A USER
A method, storage medium, and system configured to provide a first signal representing at least movements of a head of a user to a machine learning model and consequently obtain an output representing an emotion of the user, the machine learning model having been trained beforehand using a database of model signals representing movements of a head of a model user and associated with at least an emotion of the model user, and process a second signal representing a physiological parameter of the user to confirm the emotion of the user.
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
A61B 5/00 - Measuring for diagnostic purposes Identification of persons
A61B 5/11 - Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
A61B 5/16 - Devices for psychotechnicsTesting reaction times
G06F 1/16 - Constructional details or arrangements
A lens element, for example a spectacle lens, intended to be worn in front of an eye of a person comprising: - a refraction area having a refractive power based on a prescription for said eye of the person; and - a plurality of at least twenty refractive optical elements having an optical function different from the optical function of the refraction area, wherein the average absolute value of the Zernike coefficient (A) over at least ten, for example at least twenty, of the refractive optical elements is greater than or equal to 1.8 nm, for example greater than 2 nm, with for each refractive optical element the Zernike coefficient (A) being the coefficient (A) of the Zernike polynomial best fitting the optical wavefront phase difference of said refractive optical element.
A lens element intended to be worn in front of an eye of a wearer and to provide a refractive power based on a prescription of the wearer for correcting an abnormal refraction of the eye of the wearer, the lens element comprising optical microstructures having an optical function of not focusing an image on the retina of the eye of the wearer so as to slow down the progression of the abnormal refraction of the eye of the wearer; characterized in that a longitudinal chromatic aberration criterion measured over a pupil area having a diameter of at least 40 mm and including at least part of the optical microstructures on the lens element is at least 45% smaller than or equal to the longitudinal chromatic aberration criterion of a diffraction limited optical system.
A method for modifying a control mode based on user inputs, the control mode being designed to control a transmission value of a variable transmission optical element as a function of an external illumination. The method includes measuring an initial level of the external illumination, setting the transmission value of the variable transmission optical element to an initial value, acquiring a user input for adjusting a parameter related to the transmission value of the variable transmission optical element, setting the transmission value of the variable transmission optical element to a requested value, and computing, based on the requested value and on the initial level of the external illumination, a confidence value representative of a likelihood that the requested value is a user preference relative to the initial level of the external illumination, and modifying or maintaining unchanged the control mode based on the user input and on the confidence value.
H05B 47/19 - Controlling the light source by remote control via wireless transmission
G06F 3/0481 - Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
G06F 3/0482 - Interaction with lists of selectable items, e.g. menus
H05B 47/11 - Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
32.
ARTICLE COATED WITH A LOW REFRACTIVE INDEX LAYER BASED ON ORGANIC SILSESQUIOXANE COMPOUNDS
The present invention relates to an article comprising a substrate having at least one main surface coated with a layer A having a refractive index lower than or equal to 1.55, wherein said layer A was obtained by deposition of activated species issued from at least one silsesquioxane compound C in gaseous, substituted with R1, R2, R3, R4, R5, R6, R7 and R8 groups independently selected from the group consisting of alkyl, aryl, vinyl, acrylic, methacrylic, substituted alkyl, and —OSiRaRbRc in which Ra, Rb and Rc independently represent H, alkyl, vinyl, aryl, hydroxyl or a hydrolyzable group, with the proviso that Ra, Rb and Rc are not all selected from H or a hydrolyzable group.
Optical article incorporating a functionalized substrate, functionalizing and manufacturing methods thereof. The invention relates to an optical article comprising a surface-functionalized optical substrate and an optical element deposited on the same, an eyewear comprising this article, a method for functionalizing the substrate and a method of manufacturing this article. The optical substrate (5) is based on a first thermoset polymer and has a first outer surface, and the optical element (10) is based on a second thermoset polymer selected from (meth)acrylate based resins, has a second inner surface and is deposited on the optical substrate (5), the second inner surface being bonded to the first outer surface by covalent bonds at an interface thereof. According to the invention, the first outer surface is functionalized by functional groups comprising a product of a radical crosslinking reaction between the second thermoset polymer and a derivative of an organosilane compound which contains a vinyl or (meth)acrylate end group, and the derivative of the organosilane compound is a basic hydrolyzate thereof, the basic hydrolysate being grafted on the first outer surface to at least partially form said interface.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
G02B 1/14 - Protective coatings, e.g. hard coatings
The present invention relates to an ophthalmic article (10) comprising: an ophthalmic wafer (11) with a first face (111), a second face (112) opposite the first face and microstructures(114), the microstructures being either on the first face or between the first face and the second face; an adhesion promotion layer (13) on the first face of the ophthalmic wafer; a lens substrate (12) in contact with the adhesion promotion layer; wherein the adhesion promotion layer comprises an adhesive promoter having at least one of the following functional groups: –NH2, –SH, –NCO and –OH. The present invention also relates to a method for manufacturing the ophthalmic article.
The invention relates to a method of manufacturing an optical article, comprising providing a substrate having at least one main surface bearing a microstructure with a maximum peak-to-valley height PV1 higher than 0.1 μm, applying by wet deposition on said at least one main surface bearing a microstructure at least one curable liquid first coating composition, curing said at least one curable liquid first coating composition to form at least one first coating having an external surface, obtaining a substrate coated with one or more first coatings in which said microstructure is encapsulated, the outer first coating of which having an external surface with a maximum peak-to-valley height PV2 such that PV2/PV1<0.15, the ratio: maximum total thickness of the one or more first coatings/PV1 is higher than or equal to 2 and depositing an abrasion- and/or scratch-resistant coating onto said outer first coating.
This head mountable device (10) comprises an ophthalmic lens having a front wafer (120) and a back wafer (122), an optical system (14) comprising a projector including a light source, a light-guide optical element (16) arranged between the front and back wafers (120, 122) and illuminated by the optical system (14) The optical system (14) is attached to the light-guide optical element (16). The light-guide optical element (16) is bonded to the ophthalmic lens by means of a first adhesive material. The head mountable device (10) comprises, in addition to an ophthalmic portion intended for vision by a user, a non-ophthalmic portion (18) not intended for vision covering the light-guide optical element (16) and extending between the external edge of the back wafer (122) and the external edge of the light-guide optical element (16), the non-ophthalmic portion (18) comprising a hole (20) adapted to accommodate the projector.
An optical lens intended to be worn in front of an eye of a wearer, the optical lens comprising: - a refraction area having at least a first refractive power (PPO) based on a prescription adapted for the eye of the wearer; - at least one filtering zone, said at least one filtering zone comprising at least a filtering function reducing the transmission of light passing through it over a range of wavelength comprised in the visible wavelength range so that the transmission value Tlum is smaller than or equal to 50%, characterized in that a projection of the at least one filtering zone over a measuring plane is not convex and that a part of the optical lens corresponding to the complementary zone of the projected filtering zone has a transmission value Tlum greater than or equal to 90%
This head mountable device (10) comprises an ophthalmic lens (120, 122) having a front wafer (120) and a back wafer (122), an optical system (14) comprising a projector including a light source, a light-guide optical element (16) illuminated by the optical system (14) The optical system (14) is attached to the light-guide optical element (16). The light-guide optical element (16) is bonded to the ophthalmic lens (120, 122) by means of a first adhesive material. The head mountable device (10) comprises, in addition to an ophthalmic portion intended for vision by a user, a first non-ophthalmic portion (18) covering the light-guide optical element (16) and extending between the external edge of the back wafer (122) and the external edge of the light-guide optical element (16), except in the area occupied by the optical system (14), the first non-ophthalmic portion (18) being coated with the first adhesive material.
The disclosure provides an optical device (2) configured to equip an augmented reality eyewear device (1), comprising a waveguide (4) having spaced apart reflective facets (10) arranged in series in a first direction (S1) and extending in a second direction (S2) that is transverse to the first direction, the waveguide having a front face (6) and a back face (5), further comprising a polarizer (7) facing the front face and having a polarization axis (P) orthogonal to said second direction, the optical device is configured so that light incoming from an external environment of the device and directed from the front face towards the back face has a same polarization state after passing through the polarizer and then the reflective facets, as well as after passing through the polarizer and then zones devoid of reflective facets. The disclosure also provides an augmented reality eyewear device comprising such optical device.
The present disclosure relates to a method for manufacturing an ophthalmic article, comprising: - positioning (S100) a wafer from a first mold part; - adhering (S200) a first adhesive tape to both the edge of the wafer and the edge of the first mold through a first adhesive surface thereby forming a first mold cavity and obtaining a partial mold assembly with an assembly edge; - positioning (S300) a second mold part relatively to the partial mold assembly; - adhering (S400) a second adhesive tape to both the assembly edge and the edge of the second mold through a second adhesive surface; thereby forming a second mold cavity and obtaining a full mold assembly; - filling (S600, S650) the first and second mold cavities with polymerizable materials; and - polymerizing (S700) the polymerizable materials.
The present invention provides a composition suitable for use in switchable mirror devices, said composition comprising, dissolved in a solvent, a reducing compound E, a metal cation Mn+, and an organic ligand L able to form a coordination complex with Mn+, wherein E does not spontaneously reduce oxidized metal present in the composition, and wherein L comprises the following moiety I: Wherein X and X' are independently selected from O, and.
G02F 1/1503 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
G02F 1/1514 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
42.
METHOD FOR ADDITIVELY MANUFACTURING AN OPHTHALMIC DEVICE AND MANUFACTURING SYSTEM CONFIGURED TO CARRY OUT SUCH A METHOD
The disclosure provides a method for additively manufacturing an ophthalmic device having at least a curved face, thanks to at least one inkjet print head having at least one nozzle, comprising providing a manufacturing file comprising parameters including a plurality of images, at least one image being defined by a network of voxels representative of a distribution of droplets of material for inkjet printing of the curved layer and being used for activating and deactivating the nozzle; wherein the at least one image is planar and determined as a function of curvature geometrical characteristics of the curved layer of the ophthalmic device to manufacture, of geometrical characteristics of a curved supporting surface onto which are deposited the droplets of material to at least partially form the curved layer, and of location parameters of the at least one inkjet print head relative to the curved supporting surface.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 64/112 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
The disclosure relates to a device (100) for evaluating the visual discomfort of a person (1) comprising at least one neuro-physiological sensor (5) and at least a processing unit configured to determine, with a trained supervised machine learning model, the visual discomfort of the person (1).
G16H 50/30 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for calculating health indicesICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for individual health risk assessment
G16H 50/20 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems
G16H 50/70 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for mining of medical data, e.g. analysing previous cases of other patients
G16H 40/63 - ICT specially adapted for the management or administration of healthcare resources or facilitiesICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation
G16H 40/67 - ICT specially adapted for the management or administration of healthcare resources or facilitiesICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for remote operation
A61B 3/032 - Devices for presenting test symbols or characters, e.g. test chart projectors
G06N 20/10 - Machine learning using kernel methods, e.g. support vector machines [SVM]
A61B 3/028 - Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuitySubjective types, i.e. testing apparatus requiring the active assistance of the patient for determination of refraction, e.g. phoropters
A61B 3/00 - Apparatus for testing the eyesInstruments for examining the eyes
44.
METHOD FOR DETERMINING AN OPTICAL PARAMETER OF A PROGRESSIVE ADDITION LENS TO BE WORN BY A WEARER EQUIPPED WITH A HEARING AID DEVICE
The invention relates to a method, computer-implemented, for determining an optical parameter of a progressive addition lens (3) to be worn by a wearer, the progressive addition lens having an optical parameter relating to vision correction, the wearer being equipped with a hearing aid device (2) adapted to acquire, amplify and transmit sounds to the wearer, the hearing aid device having a sensitivity which is maximum along a main direction (D1), the method comprising: - determining a behavior parameter representative of a head response of the wearer, when he is equipped with the hearing aid device, to an auditive stimulation spatially offset from the main direction, - determining, based on the behavior parameter, the optical parameter of the progressive addition lens.
The disclosure provides a method for additively manufacturing an ophthalmic device delimited by a targeted curved geometrical envelope, thanks to at least one inkjet print head having at least one nozzle, the method comprising inkjet printing a first layer, the first layer being divided into several first sub-layers, and inkjet printing a second layer above the first layer, the second layer being divided into several second sub-layers, wherein a first one of the first sub-layers is disposed and others of the first sub-layers are disposed on and after the first one of the first sub-layers and are each offset from the first sub-layer immediately below by a first determined shifting distance in a first direction inside the targeted curved geometrical envelope, and wherein a first one of the second sub-layers is disposed on the first layer and is offset from the first one of the first sub-layers by a second determined shifting distance lower than the first determined shifting distance and in the first direction inside the targeted curved geometrical envelope; whereby the first one of the second sub-layers at least partially covers at least one of the others of the first sub-layers.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 64/112 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
46.
METHOD FOR MANUFACTURING A TINTED OPHTHALMIC DEVICE AND MANUFACTURING SYSTEM CONFIGURED TO CARRY OUT SUCH A METHOD
The disclosure provides a method for manufacturing a tinted ophthalmic device (5) having at least one curved face (14) thanks to at least one inkjet print head (6), the method comprising providing a manufacturing file comprising at least one image; wherein the at least one image is defined by a network of pixels representative of a distribution of tint material for inkjet printing a tint layer (17) on the at least one curved face of the ophthalmic device, and the at least one image is planar and determined as a function of at least curvature geometrical characteristics of the at least one curved face of the tinted ophthalmic device to manufacture.
The present invention relates to a method for manufacturing an ophthalmic article comprising a lens substrate and an ophthalmic wafer wherein the ophthalmic wafer has a blunt edge between a first surface thereof and its lateral surface; wherein the method comprises: providing (S100) the ophthalmic wafer; forming a mold cavity (S200); filling (S300) the mold cavity with a polymerizable composition; and curing (S400) the polymerizable composition to harden it, thus forming the lens substrate thereby obtaining the ophthalmic article The present invention also relates to ophthalmic article (1) comprising: a lens substrate (12) and an ophthalmic wafer (11) with a first surface (111) in contact with the lens substrate (12), a second surface (112) opposite the first surface (111) and a lateral surface (113) joining the first surface (111) and the second surface (112), the ophthalmic wafer (11) having a blunt edge (113) between the first surface (111) and the lateral surface (112).
Multicolor electronic device with one electrochromic cell The present invention provides an electrochromic device that can be set in states S0, S1 and S2, wherein different sets of electrochromic moieties are activated, and wherein state S2 is a state where the cell has a reversed polarity compared to state S1, all within one electrochromic cell. A single cell is thus able to achieve at least three different colors.
G02F 1/1503 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
G02F 1/1514 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
G02F 1/1516 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material comprising organic material
Electrochromic and switchable mirror lenses The present invention provides a switchable mirror device that may achieve three states S0, S1 and S2 with one single electrochemicaol cell, wherein the device has a lower transmission in state S1 than in state S0 without substantially increasing the reflectivity of the device, which means that the transition from S0 to S1 corresponds essentially to a change of color of the device without the device taking the appearance of a mirror to an outside viewer, and wherein in S2, a mirror layer is reversibly deposited, and the device will have a mirror appearance.
G02F 1/1503 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
G02F 1/1514 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
Lens element, for example a spectacle lens or a contact lens, adapted for an astigmatic wearer, said lens element providing a first optical function having a maximum power along a first principal meridian and a minimum power along a second principal meridian based on the prescription of the wearer, the lens element further comprising a plurality of optical elements, for example at least twenty optical elements, each optical element of the plurality of optical elements providing at least a second optical function different from the first optical function having a defocus property; wherein the second optical function has a different value of a parameter related to the defocus property along the first principal meridian and along the second principal meridian.
Additive manufacturing system for producing an ophthalmic lens configured for: - depositing at least one layer of a first material on a substrate, the at least one layer having at least one first cavity, - curing the at least one layer of the first material to a first level of the curing, - placing the electronic device in the at least one first cavity, - depositing at least one layer of a second material on the at least one layer of the first material, - curing the at least one layer of the second material to a second level of the curing higher, - depositing at least one layer of a third material on the at least one layer of the second material, - curing the at least one layer of the third material to a third level of the curing.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 64/112 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
The invention relates to a device (2) for myopia control using red light irradiation, the device being intended to be placed at a predetermined distance in front of an eye (10) of a subject (1). The device comprises: - a light emitting module (21) configured to irradiate a region of the fundus (11) of the eye during an irradiation period with an emitted light having a first wavelength comprised between 600 nanometers and 680 nanometers, - a controller (22) configured to control the light emitting module, wherein the light emitting module comprises at least one light source (210) the controller is configured to modulate an intensity of the at least one light source in order for the light emitting module to be configured to irradiate a region of the fundus according to a dynamic irradiation pattern (12) during the irradiation period. The invention also relates to an associated method.
A method, computer-implemented, for determining an optical parameter of a progressive addition lens to be worn by a wearer, the progressive addition lens having an optical parameter relating to vision correction, the wearer being equipped with a hearing aid device adapted to acquire, amplify and transmit sounds to the wearer, the hearing aid device having a sensitivity which is maximum along a main direction, the method including determining a behavior parameter representative of a head response of the wearer, when he is equipped with the hearing aid device, to an auditive stimulation spatially offset from the main direction, determining, based on the behavior parameter, the optical parameter of the progressive addition lens.
The invention relates to an optical article comprising a substrate having a front main face and a rear main face, at least one main face of which having a multilayer antireflection coating comprising at least one low refractive index layer having a refractive index of 1.55 or less, the refractive indexes being expressed at a wavelength of 550 nm, and at least one layer of amorphous silicon, and wherein said multilayer antireflection coating provides the optical article with the following property: the mean light reflection factor Rv on said at least one main face between 380 nm and 780 nm, defined in the ISO 13666:1998 standard, is lower than or equal to 0.9%, for an angle of incidence ranging from 0° to 15°.
This ophthalmic lens is adapted to correct a vision impairment and to slow down the progression of that vision impairment of an eye of a wearer. The ophthalmic lens has a substrate, a front surface and a back surface. The ophthalmic lens comprises at least one pattern of at least one optical element, the difference between a first wavefront produced by a theoretical lens solely correcting the vision impairment by a prescription and a second wavefront produced by the ophthalmic lens forming a piecewise affine surface.
G02B 1/02 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of crystals, e.g. rock-salt, semiconductors
G02B 1/14 - Protective coatings, e.g. hard coatings
System, eyewear and method for improving future visual performance or future cognitive performance of the individual. The system comprises a device for irradiating light toward an eye of the individual. The system is configured for: • determining, at a first time, first visual performance or first cognitive performance of the individual, • determining values of parameters of a first light to be irradiated toward an eye of the individual according to the first visual performance or the first cognitive performance of the individual, • irradiating, between the first time and a second time, the first light toward the eye of the individual, • determining, at the second time, second visual performance or second cognitive performance of the individual, • irradiating, after the second time, a second light toward the eye of the individual, when the second visual performance is better than the first visual performance or the second cognitive performance is better than the first cognitive performance, a light dose irradiated by the second light being greater than a light dose irradiated by the first light.
A manufacturing device for additively manufacturing an object encapsulating a component A manufacturing device for additively manufacturing an object, the object encapsulating a component, the manufacturing device being configured for placing the component in a volume of an optically reactive material, irradiating, for forming a part of the object, a part of the optically reactive material, the part of the optically reactive material being adjacent to the component, the irradiating being realized with a first light of a first wavelength and a second light of a second wavelength, wherein the irradiation of the part of the optically reactive material depends on a value of at least one characteristic of the component.
B29C 64/124 - 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
B29C 64/277 - Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED]
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
The present invention relates to an article having a front main face and a rear main face, comprising: at least one base element having a front main surface and a rear main surface, at least one multilayer antireflective coating, deposited on said front main surface and/or said rear main surface of the base substrate, which comprises at least two layers having a low refractive index which is lower than 1.55, defined as "LI layer", and at least two layers having a high refractive index which is equal to or higher than 1.55, defined as "HI layer", characterized in that the at least one multilayer antireflective coating is configured such that the front and/or the rear main face of the optical article has, in reflexion, - a predetermined mean light reflection factor in the visible region Rv which is lower than or equal to 1.5 %, said mean light reflection factor in the visible region Rv being as defined in the ISO 13666:1998 Standard and measured in accordance with the ISO 8980- 4, under the standard illuminant D65 and an angle of incidence of 15°, - a predetermined Chroma C*, as defined in the international colorimetric CIE L*a*b* under the standard illuminant D65, which is lower than or equal to 4 for any angle of incidence between 0° to 75°.
The invention relates to an optical article having a front main face and a rear main face, comprising: at least one base element having a front main surface and a rear main surface, at least one multilayer antireflective coating, deposited on said front main surface and/or said rear main surface of the base element, which comprises at least two layers having a low refractive index which is lower than 1.55, defined as "LI layer", and at least two layers having a high refractive index which is equal to or higher than 1.55, defined as "HI layer", said at least one multilayer antireflective coating is configured to provide to said optical article has improved colorimetric and optical characteristics.
A workpiece holding head has a housing, in/on which a holding arrangement and a support arrangement for an optical workpiece are accommodated. The holding arrangement has a rubber-elastic sealing sleeve which is mounted on the housing and which has a circumferential sealing lip for contact with the workpiece. The sealing lip surrounds an opening on the housing, to which opening a vacuum can be applied. The support arrangement has a plurality of longitudinally displaceable pins that can be placed against the workpiece and that can be fixed with respect to the housing by a clamping mechanism. Each of the pins is assigned a pneumatically actuated piston-cylinder arrangement, which can move the pin outwards with respect to the housing into a support position for the workpiece or, conversely, inwards into a park position that avoids workpiece contact, depending on the pneumatic actuation.
B24B 13/005 - Blocking means, chucks or the likeAlignment devices
B24B 13/00 - Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other workAccessories therefor
B24B 41/06 - Work supports, e.g. adjustable steadies
61.
METHOD FOR COMPARING TWO OPHTHALMIC LENSES HAVING DIFFERENT OPTICAL DESIGNS
The invention relates to a method for allowing a subjective comparison of two ophthalmic lenses having different optical designs by an eye of a subject, said method comprising: a) determining two values of one or more optical features of each ophthalmic lens of said two ophthalmic lenses, each value being determined along one of two predetermined gaze direction of the eye of the subject through said ophthalmic lens, the two predetermined gaze directions being separated by a predetermined angle, b) for each ophthalmic lens of said two ophthalmic lenses, placing successively in front of said eye of the subject test lenses, each of these test lenses exhibiting optical features having one of said two values of one or more optical features determined in step a) for this ophthalmic lens, c) observing a target through each of said test lenses, d) comparing the perception by said eye of said subject of this target through the test lenses corresponding to each ophthalmic lens of said two ophthalmic lenses.
A61B 3/00 - Apparatus for testing the eyesInstruments for examining the eyes
A61B 3/028 - Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuitySubjective types, i.e. testing apparatus requiring the active assistance of the patient for determination of refraction, e.g. phoropters
62.
VACUUM CLEANER FILTER BAG AND METHOD FOR PREPARING THE VACUUM CLEANER FILTER BAG
The invention relates to vacuum cleaner filter bag for ophthalmic lens engraving, comprising a filter bag body forming a volume and expandable polystyrene (EPS) particles disposed in the volume. The invention extends the life of the filter bag.
The disclosure relates to a tonometer arm comprising: - a plenum chamber body (110) having a fluid inlet (111) and a fluid outlet (112), - an inlet pipe connected to the fluid inlet and adapted to supply a fluid in the plenum chamber body along an inlet axis, - an outlet pipe (130) connected to the fluid outlet and adapted to eject the fluid outside of the plenum chamber body along an outlet axis (A2) tilted relative to the inlet axis, wherein the plenum chamber body comprises at least one inner wall (114, 115) extending substantially radially with respect to the outlet axis.
A61B 3/16 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for measuring intraocular pressure, e.g. tonometers
64.
MYOPIA CONTROL LENS HAVING PHOTOCHROMIC PROPERTIES
The invention relates to optical article intended to be worn in front of an eye of a person comprising at least: (a) a base element having a front main surface and a rear main surface, said front main surface comprising: (a1) a refraction area having a refractive power based on a prescription for said eye of the person; and (a2) a plurality of optical elements having an optical function different from the optical function of the refraction area, (b) at least a photochromic stack coated on the rear main surface of the base element, said photochromic stack comprising at least (b1) one photochromic layer including at least one photochromic compound which is selected to be able to reversibly switch from a deactivated state corresponding to a bleached state to an activated state corresponding to a colored state when an electromagnetic radiation having a wavelength of greater than a predetermined wavelength is applied, wherein said photochromic stack has a mark of 0 or 1 in a crosshatch adhesion test as defined according to standard ASTM D3359-93. The invention also relates to its method of manufacturing and an eyewear.
The present application relates to a method of manufacturing a polymeric cast substrate, the method comprising the steps of:
providing a casting mold assembly containing two unsealed mold parts each having an inside surface and an outside surface, the inside surface of at least one of the unsealed mold parts comprising a composition comprising a UV absorbing agent;
arranging the inside surfaces of the mold parts opposite to each other and closing the casting mold assembly so that the inside surfaces of both mold parts form together the molding cavity;
filling a polymerizable composition in the molding cavity;
curing the polymerizable composition in the mold assembly to obtain a polymeric cast substrate.
The present application relates to a method of manufacturing a polymeric cast substrate, the method comprising the steps of:
providing a casting mold assembly containing two unsealed mold parts each having an inside surface and an outside surface, the inside surface of at least one of the unsealed mold parts comprising a composition comprising a UV absorbing agent;
arranging the inside surfaces of the mold parts opposite to each other and closing the casting mold assembly so that the inside surfaces of both mold parts form together the molding cavity;
filling a polymerizable composition in the molding cavity;
curing the polymerizable composition in the mold assembly to obtain a polymeric cast substrate.
The present application further relates to an optical article, preferably a lens, comprising a polymeric cast substrate manufactured according to this method, and also relates to an eyewear comprising such optical article.
The invention relates to a system (1) for blocking an ophthalmic lens (2) with an insert (3), said system comprising:—a cover (10) forming a chamber, filled with a gas, in which the ophthalmic lens and the insert are bonded by a glue (4); and—a control unit (20) adapted to control an oxygen concentration of the gas while the glue is polymerizing.
The disclosure relates to a lens element (1) comprising a first surface (10) and a second surface (20), wherein each of said surfaces comprises microstructures (11, 12, 21, 22) configured to modulate light by introducing a wavelength-dependent phase shift, wherein, for at least one given gaze direction of a reference wearer under reference wearing conditions: the microstructures of the first and second surfaces have a first degree of alignment for light (41, 42) directed towards a central area (31) of a retina of the reference wearer, producing a first optical path difference map having a first average optical path difference (I) over the central area, and the microstructures of the first and second surfaces have a second degree of alignment for light (43, 44) directed towards a peripheral area (32) of the retina of the reference wearer, producing a second optical path difference map having a second average optical path difference (II) over the peripheral area, wherein a difference (III) between the first average optical path difference and the second average optical path difference is greater than, or equal to, 50 nm for at least one wavelength.
The disclosure relates to an apparatus (10) for determining a value of at least one characteristic of an eye of an individual (200), comprising: - a housing (22), - a individual's head support (25), - a tonometer arm (100) configured to determine the value of the at least one characteristic, and movable relative to the housing between a position of use and a retracted position distinct from the position of use, and wherein the housing comprises positioning means suitable to determine the position of the individual 's eye relative to the housing when the individual's head rests on the individual's head support, whether the tonometer arm is in retracted position or in position of use.
A61B 3/00 - Apparatus for testing the eyesInstruments for examining the eyes
A61B 3/16 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for measuring intraocular pressure, e.g. tonometers
A61B 3/18 - Arrangement of plural eye-testing or -examining apparatus
69.
MANUFACTURING ALLYLIC LENSES WITH IMPROVED COLOR USING BENZOYL PEROXIDE AS THE INITIATOR
The present disclosure relates to a method for manufacturing a lens comprising the following steps: ⋅a. Providing a mass m anyi of at least one allyl monomer or allyl oligomer, ⋅b. Providing a radical initiator composition comprising benzoyl peroxide (BPO) in mixture with water, ⋅c. Mixing said at least one allyl monomer or allyl oligomer with the radical initiator composition to obtain a polymerizable composition, ⋅d. Stripping the water from the polymerizable composition to obtain a dried polymerizable composition, e. Providing a mold assembly and filling the mold assembly with the dried polymerizable composition, f. Curing the dried polymerizable composition in the mold assembly to obtain the lens. The invention also provides a polymerizable composition for the manufacture of a lens that is characterized by reduced yellowing.
C08F 118/00 - Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid
The disclosure relates to a manufacturing method of a lens element (1) comprising the steps of a - producing a functional diffusive structure (5) configured to attenuate at least one eye discomfort; b - forming at least three securing elements (7) to fit the functional diffusive structure (5) to a mould; c - mounting the functional diffusive structure (5) in the mould via the securing elements (7); and d - moulding the lens 5element (1) by filling the mould to embed the functional diffusive structure (5) in the lens element (1).
A polishing tool for processing technical surfaces includes a polishing main body and a polishing support, wherein: the polishing support has at least one polishing grain; at least one material property of the polishing support changes perpendicularly or horizontally to an axis of rotation of the polishing tool in order to be able to control a polishing removal function in a targeted manner on a surface to be processed of a workpiece; the polishing tool includes integrated cooling channels via which a polishing suspension is supplied; and the effect of the at least one polishing grain on the workpiece surface can be influenced by the change in the material property.
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents
B24B 13/01 - Specific tools, e.g. bowl-likeProduction, dressing or fastening of these tools
B24B 57/02 - Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
B24D 18/00 - Manufacture of grinding tools, e.g. wheels, not otherwise provided for
B33Y 80/00 - Products made by additive manufacturing
73.
METHOD FOR DETERMINING CYLINDRICAL OFFSET VALUES OF AN OPHTHALMIC LENS MANUFACTURING PROCESS
The invention relates to a method for determining cylindrical offset values of an ophthalmic lens manufacturing process, the method comprising: - providing ophthalmic lenses manufactured by means of said manufacturing process, each ophthalmic lens being produced with the intention of complying with a required cylinder, - for each ophthalmic lens, measuring an effective cylinder, - in a common two-dimensional reference frame, calculating, for each ophthalmic lens a difference between the effective cylinder and the requested cylinder, - calculating a mean of the differences, - determining, based on the mean, a cylindrical offset power value of said manufacturing process and an cylindrical offset axis value of said manufacturing process along which the cylindrical offset power value is oriented.
Method for characterizing at least part of a lens element, for example a myopia control lens element, adapted for a wearer, said lens element providing a first optical function having a power based on a prescription of the wearer, and comprising a plurality of optical elements, for example at least twenty optical elements, each optical element of the plurality of optical elements providing one or more optical functions, at least one of which is different from the first optical function, the lens element comprising two surfaces, wherein the method comprises : - obtaining over a measuring pupil positioned on said at least part of the lens element at least a value of the modulation transfer function (MTF) of the lens based on at least one feature of the at least part of the lens element measured over the measuring pupil, - determining a value for an estimator factor over the measuring pupil based on the obtained at least one value of the modulation transfer function (MTF) of the lens over said measuring pupil, - determining for different positions of the measuring pupil on the at least part of the lens element a value of the estimator factor, - characterizing said at least part of the lens element by computing the determined values of the estimator factor at the different positions of the measuring pupil.
The invention concerns a lens element (200) intended to be placed in front of an eye of a viewer, the lens element comprising a transmissive metalens (100) having an array of nanostructures (161, 162, 163...), the transmissive metalens forming a phase gradient lens, the transmissive metalens having a first optical power in a first wavelength range, a second optical power in a second wavelength range, the first wavelength range and the second wavelength range being in a visible range and being distinct from each other, the array of nanostructures of the metalens being arranged and configured to induce a determined longitudinal chromatic aberration between the first wavelength range and the second wavelength range, a difference between the first optical power and the second optical power being comprised between 0,5 and 6 diopters in absolute value.
The disclosure provides a method for additively manufacturing an ophthalmic device thanks to at least one inkjet print head (6) having a plurality of nozzles (15), comprising providing a manufacturing file comprising parameters including a plurality of images, each image being representative of distribution of voxels or droplets for inkjet printing at least partially a layer of the ophthalmic device and each image being used for activating and deactivating nozzles of the at least one inkjet print head, wherein for at least some images, some nozzles of the at least one inkjet print head are selected depending on determined deviation characteristics of the nozzles of the at least one inkjet print head, the selected nozzles being representative of a group of adjacent nozzles located in an inkjet printing window.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 64/112 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
77.
METHOD FOR MANUFACTURING AN OPTICAL ARTICLE FOR CONTROLLING EYE-LENGTH RELATED DISORDERS WITH LIGHT FILTERING FUNCTIONS
A method for manufacturing an optical article for controlling eye-length related disorders with light filtering functions comprising the steps of: - providing (50) a mold (70) comprising a shaped portion (70a) having a concave micro-structured surface and a smooth portion (70b) having a smooth surface defining a cavity (73); - inserting (52) a light filtering wafer (72) against the concave micro-structured surface (70a); - injecting (56) an optical thermoplastic material (74) into the cavity (73) of the mold (70) via a filler (76), against a back surface of the light filtering wafer (72); - applying a packing pressure via the filler (76) to force more optical thermoplastic material (74) into the mold (70) to compensate for a shrinkage of the optical thermoplastic material (74) during cooling; - opening (58) the mold (70) after the optical thermoplastic material (74) is solidified, thus obtaining an optical article (78) having microstructures (80) on a front surface of the light filtering wafer (72).
An insert (10) which is suitable for injection-molding of an ophthalmic lens from a polymer-based material, is modified for the ophthalmic lens to be devoid of weld line and optical distortions. Part of the insert is comprised of a metal foam or metal alloy foam (13; 13') having a thermal conductivity of less than 20 W∙m-1∙K-1. The insert may be provided with a surface pattern suitable for generating a microstructure in an optical surface of the ophthalmic lens. The microstructure may comprise a set of separated bulges (24) each forming a convex optical surface portion of a positive microlens included in the optical surface of the ophthalmic lens. In this way, the ophthalmic lens has a myopia control function, additionally to compensating for a myopia of a wearer of the ophthalmic lens.
The invention relates to a method of curing a polythiourethane based transparent casted substrate, comprising providing a first component A comprising at least one polyisocyanate or polyisothiocyanate monomer A2, providing a second component B comprising a polythiourethane pre-polymer B1 having thiol end groups, mixing together first and second components A and B and filling a molding cavity of a casting mold assembly with the resulting polymerizable mixture, curing said polymerizable mixture to obtain a polythiourethane based transparent substrate, wherein curing step 4) is carried out in the presence of at least one salt catalyst in an amount ranging from 0.015% to 0.15% by weight with respect to the total weight of polymerizable compounds present in the mixture of first and second components A and B. Alternatively, the first component A comprises a polythiourethane pre-polymer A1 having isocyanate or isothiocyanate end groups and the second component B comprises at least one polythiol monomer B2.
C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
C08G 18/76 - Polyisocyanates or polyisothiocyanates cyclic aromatic
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
80.
PROCESS FOR THE DETERMINATION OF AN ESTIMATION OF A FITTING HEIGHT OF A LENS IN A FRAME OF SPECTACLES AND CORRESPONDING APPARATUS
A process and apparatus for determination of an estimation of a fitting height of a lens in a frame of spectacles. An upper referential point of the frame situated at a level above the mounting point is specified, the referential point allowing to define an upper referential horizontal plane passing on the upper referential point and a structural term defined as an algebraic distance between a bottom referential line and the upper referential horizontal plane is measured, and a postural term defined as an algebraic distance between the upper referential horizontal plane and a gazing axis, is measured, the fitting height being estimated by summing the value of the postural term and the value of the structural term.
The present invention discloses a device comprising an electrochromic cell comprising an electrochromic formulation, wherein the electrochromic formulation comprises: - A solvent, - An ionic electrochromic compound C0 dissolved in the electrochromic formulation, and - A lithium salt dissolved or dispersed in the electrochromic formulation. said device further comprising means to apply electric energy to the electrochromic cell, said means being configured to be able to maintain the electrochromic cell in at least two states S0 and S1, wherein: - In S0, no electric energy is applied to the electrochromic cell, - In S1, at least part of compound C0 present in state S0 is excited into a compound C0*, wherein C0 and C0* do not have the same color.
G02F 1/1503 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
G02F 1/1514 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
G02F 1/1516 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material comprising organic material
82.
APPARATUS AND METHOD FOR HEAT TREATMENT OF AT LEAST ONE LENS BODY
Apparatus (1) for heat treatment of at least one lens body (3), the apparatus (1) comprising-at least one mold assembly (7) for casting a lens, each mold assembly (7) comprising a first mold member (9) and a second mold member (9), the first and second mold members (9) being arranged to hold the lens body (3) between them,—at least one induction coil (15) disposed facing the at least one mold assembly (7), and—a temperature control unit (17) configured to monitor a temperature in the mold assembly (7), wherein at least one from the first mold member (9) and the second mold member (9) comprises at least one metallic part (11, 25, 29) made of a metallic material, the induction coil (15) being configured to generate a magnetic field when supplied with electrical current and generate heat in each metallic part of each mold assembly (7).
A calibration method for determining angles between an image acquisition module reference frame and an accelerometer reference frame of a portable electronic device, comprising receiving a set of images of a known pattern from the image acquisition module from different positions, the known pattern being in the same spatial position when acquired, and each image being associated with a gravity data corresponding to the measurement of the gravity by the accelerometer expressed in the accelerometer reference frame, determining the angles between the image acquisition module reference frame and the known pattern reference frame based on the received pictures of the set of pictures, determining the angles between the image acquisition module reference frame and the accelerometer reference frame based on the determined angles between the image acquisition module reference frame and the known pattern reference frame and assuming the gravity measured by the accelerometer is the same for each image.
A method for additively manufacturing an ophthalmic device includes additively manufacturing a plurality of layers of a predetermined material in order to obtain the ophthalmic device, each layer being manufactured by projecting and polymerizing at least one image on a surface of a volume of the predetermined material, a first face being directed downwards and a second face being directed upwards, the method including forming at least one image permitting to cure a predetermined thickness of material on the side of the second face directed upwards and another thickness of material on the side of the first face directed downwards.
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
B29C 64/40 - Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
B29L 11/00 - Optical elements, e.g. lenses, prisms
The invention relates to an eyewear (1) comprising: - an ophthalmic lens (20) having an adjustable optical power, the ophthalmic lens being placed in front of an eye of the user for improving the vision of the user; - a first sensor (30) adapted to acquire a first signal representative of a temporal variation of an optical power of the eye; - a second sensor (40) adapted to acquire, synchronously with acquiring the first signal, a second signal representative of a temporal variation of an accommodation capacity of the eye; - a control unit (50) programmed to: i) determine a first direction of change of the first signal at a given moment and a second direction of change of the second signal at said given moment; ii) modify or maintain unchanged, based on the first direction of change and the second direction of change at said given moment, the adjustable optical power of the ophthalmic lens.
A monitoring equipment including an eyewear that includes a frame, at least one lens that is fixed to the frame and that is able to change the natural evolution of an optical deficiency, a wearing sensor able to determine if the eyewear is being worn by a wearer, and a processing unit that is programmed to acquire the data determined by the wearing sensor, deduce therefrom a parameter relative to the length of time the wearer has worn the eyewear during a predetermined period, and compare said parameter with at least a predetermined datum to determine a level of efficiency of the optical deficiency treatment.
It is disclosed a method of manufacturing an optical article comprising: Providing a base lens substrate having first and second opposite optical surfaces. forming at least one optical element protruding from the second surface of the base lens substrate, and forming at least one second layer extending over the second surface of the base lens substrate and encapsulating the at least one optical element, wherein the optical element and the second layer are formed in materials having different refraction indexes. and the forming of the optical element is performed by inkjet printing. It is also disclosed an optical article obtained by application of this method.
System and computer implemented method for determining updated values of manufacturing parameters to reduce defects in manufactured items. The system is configured for receiving descriptions of the defects, the descriptions being provided in a natural language, converting the descriptions into inputs suitable for a deterministic problem-solving module and feeding the inputs in the deterministic problem-solving module to obtain the updated values of the manufacturing parameters.
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
89.
METHOD FOR MAKING A WATER-BASED ANTI-ABRASION HARD COAT COMPOSITION
The invention relates to a method for making a water-based anti-abrasion hard coat. The method comprises steps of (a) hydrolyzing a tetraalkoxysilane compound with an amount of HCl solution having a concentration from 0.025 to 0.05 mol·L⁻¹, the amount corresponding to greater than 50% and up to 100% of the stoichiometric amount, to obtain a first composition; (b) adding a hydrolysable epoxysilane compound to the first composition; (c) stirring the composition obtained from step (b); (d) adding an excess amount of water to hydrolyze the epoxysilane compound, and to lower the HCl concentration to less than 0.025 mol.L-1; and (e) adding a chelate aluminum catalyst under stirring.
The invention relates to an optical article comprising at least: (a) a substrate having a front main face and with a rear main face: (b) at least one photochromic compound that is able to undergo a transformation from one state, defined as “deactivated state” to another state, defined as “activated state” in response to predetermined wavelengths of the electromagnetic spectrum, (c) coated directly or indirectly onto the front face of said substrate (a), a mirror coating, said mirror coating—comprising at least two layers having a low refractive index which is lower than 1.55, defined as “LI layer”, and at least two layers having a high refractive index which is equal to or higher than 1.55, defined as “HI layer”,—and having a mean light reflection factor for wavelengths ranging into said predetermined wavelengths of the electromagnetic spectrum, defined as Rm(predetermined spectrum) that is lower than or equal to 1.0%, for an angle of incidence of 15°; a mean light reflection factor in the visible region Rv that is lower than or equal to 10.0% for an angle of incidence of 15°; and an optical robustness corresponding to the standard deviation of said mean light reflection factor in the visible region Rv, defined as “σRv” that is lower than or equal to 0.7% for an angle of incidence of 15°.
The invention relates to a system for assessing a suitability between a corrective optical device and a subject, the system being configured to: - determine an accommodative demand (AS) and a convergence demand (VS) to which the subject is submitted in a virtual optical system, the virtual optical system representing the subject looking at a target through the corrective optical device, - calculate, using a predictive vision model of the subject, a response of the subject to the accommodative and convergence demand, the response comprising an accommodation value (AR), a convergence value (VR) and a visual performance value (VP), the predictive vision model taking into account interactions between an accommodation sub-model (100) of the predictive vision model, a convergence sub-model (200) of the predictive vision model and a visual performance sub-model (300) of the predictive vision model, - assess the suitability based on at least one of the accommodation value, the convergence value and the visual performance value.
A61B 3/00 - Apparatus for testing the eyesInstruments for examining the eyes
A61B 3/028 - Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuitySubjective types, i.e. testing apparatus requiring the active assistance of the patient for determination of refraction, e.g. phoropters
A61B 3/04 - Trial framesSets of lenses for use therewith
A61B 3/09 - Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing accommodation
A61B 3/103 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
A61B 3/08 - Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing binocular or stereoscopic vision, e.g. strabismus
A lens element comprising: a vision zone; and within at least part of the vision zone, chromatic light-scattering elements defined as elements configured for selective light scattering in at least one predetermined wavelength range, thereby inducing chromatic contrast reduction across said at least part of the vision zone.
A method for determining a personalized near vision index for an individual, including measuring at least one parameter related to accommodation of the individual; determining a binocular vision model representing vision of the individual; obtaining the personalized near vision index as comprising a binocular visual effort of the individual in near vision, the binocular visual effort being evaluated as a function of the measured at least one parameter related to accommodation and of the determined binocular vision model.
A61B 3/08 - Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing binocular or stereoscopic vision, e.g. strabismus
A61B 3/09 - Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing accommodation
Centrifugal separator [machines]; centrifugal separators for
use in industrial applications within the automotive,
aircraft, light industrial, ophthalmic and scientific lens,
and other manufacturing industries to provide for the
separation of particulate from industrial liquids, i.e.,
water, oil, and water soluble coolants; chip separators
being machines, chip compactors being machines, briquette
presses, wedge wire screens being parts of machines, filter
cartridges for filtering machines, pump stations being
installations of pumps, fluid collection tanks [parts of
machine], debris collection containers [parts of machines]
and spare and wear parts for the aforesaid machines.
96.
METHOD FOR MEASURING A DISTANCE SEPARATING A CAMERA FROM A USER
The invention relates to a method for measuring a test distance (DT) separating a camera (CAM) from a user (1), comprising steps of: - prompting the user to get in a first position, - displaying a reference object, - acquiring a first image comprising the reference object and at least one body of the user, - detecting and measuring a calibration length from the reference and obtaining a calibration distance separating the camera and the reference object, - detecting and measuring at least one first reference length relative to the at least one body part, - prompting the user to get in a second position, - acquiring a second image comprising the at least one body part, - detecting and measuring at least one second reference length (RL') in the second image, and - obtaining the test distance (DT).
G01B 11/02 - Measuring arrangements characterised by the use of optical techniques for measuring length, width, or thickness
G01B 21/04 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
A lens element in particular for a spectacle lens, a contact lens or an intraocular lens, intended to be worn by a wearer comprising: at least a first zone with a refraction area with a front face and a rear face, the refraction area having a refractive power based on a prescription for said eye of the wearer, at least one microstructured second zone outside said first zone and configured for myopia or hyperopia control, said microstructured second zone being characterized by a measurable surface spatial power spectral density.
This method for automatically defining a gluing pattern for gluing a first optical component on a second optical component, said first optical component having a peripheral edge, a predetermined shape and a predetermined curvature, comprises a calculation step (10) taking account of the shape, the curvature and at least one glue dispensing parameter to deduce the gluing pattern, so that glue used for the gluing, applied on the shape at each point of the gluing pattern, reaches the peripheral edge at the same time
The invention relates to a process for shaping an ophthalmic product (20) using a machining device (200) equipped with clamping means (202, 203), a machining tool (210) and a force sensor (234) adapted to measure a force that is related to the force applied by the machining tool to the ophthalmic product (20). According to the invention, the process comprising: —a step of clamping the ophthalmic product in said clamping means; and —a step of roughing out the ophthalmic product by means of the machining tool so as to bring the initial outline of the ophthalmic product to a final outline of different shape, wherein, during the step of roughing out: —the value of said force is measured by the force sensor, and —the machining speed is continuously adjusted so as to maintain the measured value equal to a target value.
B24B 51/00 - Arrangements for automatic control of a series of individual steps in grinding a workpiece
B24B 9/14 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
B24B 49/16 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
100.
SEPARATOR DEVICE ADAPTED TO BE POSITIONED BETWEEN TWO OPHTHALMIC LENSES
A separator device adapted to be positioned between two ophthalmic lenses having a housing having a top plate and a bottom plate parallel to the top plate. The top plate has at least three circular apertures and the bottom plate has the same number of circular apertures as the top plate and at the same locations. The separator device further includes, at each of these locations, a ball accommodated between the top and bottom plates in a pair of the apertures, the diameter of each aperture being smaller than the diameter of each ball, each ball protruding from the top and bottom plates through the apertures and being able to rotate freely in the apertures thanks to a predetermined clearance between each ball and the edge of the apertures accommodating the ball.
B23Q 7/04 - Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of grippers
B25J 15/06 - Gripping heads with vacuum or magnetic holding means
