A method, apparatus, and system are provided to monitor and characterize the dynamics of a phase change region (PCR) created during laser welding, specifically keyhole welding, and other material modification processes, using low-coherence interferometry. By directing a measurement beam to multiple locations within and overlapping with the PCR, the system, apparatus, and method are used to determine, in real time, spatial and temporal characteristics of the weld such as keyhole depth, length, width, shape and whether the keyhole is unstable, closes or collapses. This information is important in determining the quality and material properties of a completed finished weld. It can also be used with feedback to modify the material modification process in real time.
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
B26F 1/26 - Perforating by non-mechanical means, e.g. by fluid jet
B26F 3/00 - Severing by means other than cuttingApparatus therefor
G01B 5/00 - Measuring arrangements characterised by the use of mechanical techniques
A system includes one or more current sources configured to couple to an AC to DC power converter without a DC-to-DC converter between the current sources and the power converter. Each of the current sources includes a high voltage switch and one or more independent safety shutoffs. The one or more safety shutoffs are configured to disable emission of electromagnetic radiation from a laser module when triggered. A current source controller coupled to the safety shutoff(s) is configured to generate enabling signals that enable normal current source operation. The controller includes circuitry configured to measure power across the high voltage switch when the controller instructs the high voltage switch to turn off to determine proper operation of the safety shutoff(s).
H01S 3/13 - Stabilisation of laser output parameters, e.g. frequency or amplitude
H01S 3/091 - Processes or apparatus for excitation, e.g. pumping using optical pumping
H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
H02M 7/06 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H02M 1/14 - Arrangements for reducing ripples from DC input or output
3.
Gas Shielding Device for Use with a Laser Processing Head
A gas shielding device may be used with a laser processing head, such as a welding head, to diffuse and distribute a shield gas over a larger gas shielding area for shielding a larger area of metal. The gas shielding device may be coupled to the laser processing head to move with the laser beam and may be arranged coaxially to provide the larger shielding effect in all directions of welding. The gas shielding device is particularly useful for welding titanium or other metals that are highly reactive with gases in the air and/or for larger welding areas (e.g., where the laser beam is wobbled).
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
A method for controlling a surgical laser system that includes providing a surgical fiber configured to receive light reflected from a target in a surgical treatment area, and providing a computing device configured to couple with at least two photodetectors, each photodetector configured to detect an intensity of reflected light from the target in a different selected wavelength band, the computing device further configured, to: receive the reflected light intensity in at least two selected, wavelength, bands, generate optical data corresponding to the reflected light intensity, and identify the target as a treatment target or a non-treatment target based at least in part on the optical data and a predetermined calibration based on at least two known targets.
A method for controlling a surgical laser system that includes providing a surgical fiber configured to receive light reflected from a target in a surgical treatment area and deliver laser radiation from a treatment laser source to a treatment target, and providing a computing device configured to couple with at least two photodetectors, each photodetector configured to detect an intensity of reflected light from the target in a different selected wavelength band, the computing device further configured to: receive the reflected light intensity in at least two selected wavelength bands, generate optical data corresponding to the reflected, light intensity, and identify the target as a. treatment target or a non-treatment target based at least in part on the optical data and a predetermined calibration based on at least one known target.
A61B 18/24 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor with a catheter
G16H 20/40 - ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
6.
SYSTEMS AND METHODS FOR SIMULATION OF LASER FUENCE ON A SURFACE OF A PART DURING A LASER TREATMENT PROCESS
Systems and methods for simulation of laser fluence simulate a laser treatment process to be performed on a part by a laser processing system and determine simulated fluence values at points on a surface of the part to be processed. The simulated fluence value is determined at each point on the surface of the part to be processed by virtually measuring a ray distance to each point and ray angle at each point during a simulation of the laser treatment process. The ray distances and ray angles are virtually measured based on a ray origin associated with an optics component used to deliver the laser to the surface. The optics component may include a scanning optics component that scans the laser beam on the surface or a projection optics component that projects the laser beam on the surface. The simulated fluence values determined by the simulation may be used to optimize the actual laser treatment process.
A laser drilling system is configured with a combination of system components including a fiber laser source, laser processing head, dynamic compensator, configured with one or multiple galvanometers, and stage supporting the workpiece to be laser drilled. The system components are all functionally coupled to one another to provide a plurality of trepanned holes in the workpiece each with the desired geometry. The laser head and stage are continuously displaceable relative to one another while the dynamic compensator pivots so as to keep the laser spot and the predetermined drilling location stationary relative to one another over a predetermined period of time sufficient for drill the hole. The laser source is selected from solid-state lasers configured with a single core or multi-core delivery fiber. The multicore delivery fiber is associated with adjustable mode beam (AMB) lasers to provide annular, polygonal or irregular holes.
UNIVERSITY OF FLORIDA RESEARCH FOUNDATION INC. (USA)
IPG PHOTONICS CORPORATION (USA)
Inventor
Vodopyanov, Konstantin
Vasilyev, Sergey
Mirov, Mikhail
Abstract
An optical parametric device (OPD), which is selected from an optical parametric oscillator (OPO) or optical parametric generator (OPG), is configured with a nonlinear optical element (NOE) which converts an incoupled pump radiation at first frequency into output signal and idler radiations at one second frequency or different second frequencies, which is/are lower than the first frequency, by utilizing nonlinear interaction via a random quasi-phase matching process (RQPM-NOE). The NOE is made from a nonlinear optical material selected from optical ceramics, polycrystals, micro and nanocrystals, colloids of micro and nanocrystals, and composites of micro and nanocrystals in polymer or glassy matrices. The nonlinear optical material is prepared by modifying a microstructure of the initial sample of the NOE such that an average grain size is of the order of a coherence length of the three-wave interaction which enables the highest parametric gain achievable via the RQPM process.
H01S 3/108 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
G02F 1/355 - Non-linear optics characterised by the materials used
G02F 1/39 - Non-linear optics for parametric generation or amplification of light, infrared, or ultraviolet waves
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
H01S 3/109 - Frequency multiplication, e.g. harmonic generation
A system for wavelength conversion. In certain example an oven for a nonlinear optical (NLO) crystal includes a thermally conductive enclosure configured to define an opening for holding the NLO crystal and to thermally conduct heat between a heating element and the NLO crystal, the thermally conductive enclosure in thermal contact with at least a portion of the NLO crystal and the heating element configured to heat to a temperature of at least 250° C. inclusive, a support structure configured to support the thermally conductive enclosure, the support structure thermally isolated from the thermally conductive enclosure, and an expandable attachment assembly configured such that the NLO crystal is secured within the opening of the thermally conductive enclosure by a spring force exerted by the expandable attachment assembly.
A head-worn optical protection device includes a lens clamp assembly that facilitates adding and/or removing at least one of a plurality of lenses. The head-worn optical protection device may be a welding helmet particularly suited for laser welding applications. The lens clamp assembly includes one or more lens clamps that engage one or more lenses and holds the lens(es) against a lens frame in a main body of the protection device. In one embodiment, the lens clamp assembly may include a releasable lens clamp with an actuator that releasably engages the lens frame and facilitates removal of lenses in a lens stack. In another embodiment, the lens clamp assembly may include an outer lens clamp for securing an impact shielding lens in an outer portion of the lens frame and a separate inner lens clamp for securing optical lenses, such as DIN-rated lenses, in an inner portion of the lens frame.
A fiber laser source is configured with a plurality of individual fiber lasers which are coupled to one another in series. Each subsequent fiber laser is configured to transmit laser radiation of any of fiber laser or lasers located upstream therefrom. The switching among different operational regimes of the laser source, which includes SM, MM and different MMs and associated therewith beam shape, beam quality and power parameters is provided at high frequency corresponding to on/off switching of each individual fiber laser.
A method and system for additive manufacturing is disclosed. In one example, the method comprises (a) positioning a foil layer onto a substrate, (b) laser welding the foil layer to the substrate, (c) laser ablating the foil layer using a pulsed laser beam to remove at least a portion of the foil layer, the pulsed laser beam comprising optical pulses with a pulse duration in a range from 0.5 ps to 10 ps inclusive, and (d) repeating steps (a) to (c) until the 3D component is completed.
09 - Scientific and electric apparatus and instruments
Goods & Services
Personal protective equipment, including protective masks, helmets and respirators; protective barriers and protective shields to prevent against accidents and injury; clothing and gloves for protection against accidents and injury; safety eyewear.
09 - Scientific and electric apparatus and instruments
Goods & Services
Personal protective equipment, including protective masks, helmets and respirators; protective barriers and protective shields to prevent against accidents and injury; clothing and gloves for protection against accidents and injury; safety eyewear.
15.
Systems and Methods for Monitoring and/or Controlling Wobble-Processing Using Inline Coherent Imaging (ICI)
A system and method may be used to monitor and/or control material processing where a process beam is moved in a wobble pattern, such as a wobble-welding process. While at least one process beam is moved according to a wobble pattern on a processing site (e.g., a weld site) of a workpiece, an ICI system moves an imaging beam at least partially independently of the process beam to one or more measurement locations on the wobble pattern and obtains ICI measurements (e.g., depth measurements) at those locations. The ICI measurement(s) may be used, for example, to evaluate keyhole and/or melt pool characteristics during a welding process. Although the present application describes wobble welding processes, the systems and methods described herein may also be used with other material processing applications where a laser or other energy beam is wobbled or dithered during processing including, without limitation, additive manufacturing, marking and material removal.
A high power narrow linewidth laser system is provided with a master oscillator power fiber amplifier (MOPFA) architecture which includes a master oscillator (MO) and booster. The laser system includes at least one photodetector (PD) operative to detect pulsed stimulated Brillouin scattered (SBS) light propagating backwards from the PA to the MO. The PD converts the detected SBS light to an electrical signal which corresponds to a pulse peak power of the detected SBS light. The laser system has a central processing unit (CPU) receiving the electrical signal and operable to determine if the peak power of the detected SBS light is within a threshold safety power range of the SBS light which ranges between 8 and 12 kW. If the peak power is within the threshold safety range, the CPU controllably decreases an output power of MO-generated signal light within a 50-500 ns time period prior to the shutdown of the booster so as to prevent the determined SBS peak power from reaching a critical peak power in a 1-5 MW.
H01S 3/108 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
17.
IDENTIFICATION AND CORRECTION OF WELD PATHS USING OPTICAL COHERENCE TOMOGRAPHY
A method and system tor laser welding a workpiece. The system may include a laser source emitting processing laser radiation, an OCT system that includes an imaging light source emitting imaging light and is configured to generate an interferometric output, a laser head configured to direct processing laser radiation and a beam of the imaging light onto the workpiece, at least one scanner configured to direct the beam of imaging light along at least one measurement weld path, on the workpiece, and at least one controIler configured to: receive data corresponding to a reference weld path on the workpiece, generate a corrected weld path, based at least in part on a comparison between the interferometric output of the at least one measurement weld path and the reference weld path, and control the laser head such that the processing laser radiation is directed along the corrected weld path on the workpiece.
A mufti laser-based comb (MLC) source is configured with a plurality of laser combs. The-MLC is further configured with a narrow briswidth optical pump including a single frequency laser which is common to the laser combs. The pump light from, the narrow linewidth optical pump is coupled into and energizes the laser combs to output respective frequency combs each spanning over a single or multiple octaves. The laser combs each are phase-locked to the SF laser of the optical pump which thus provides the laser combs with a high degree of mutual coherence.
H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
H01S 3/13 - Stabilisation of laser output parameters, e.g. frequency or amplitude
H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
H01S 3/106 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
An endoscopic device having reduced cross-section and a steering section of enhanced compliance. The device defines a smaller cross-section by eliminating need for pull wires and torsion sleeves. Use of a single fiber optic for steering opens up cross-sectional space to augment both irrigation and aspiration channels within a common catheter shaft. The single fiber optic may be utilized for “pulling” and/or “pushing” on the steering section, thereby providing unidirectional or bidirectional steering with a single fiber or fiber bundle. A distal steering section is configured to enhance compliance in response to the forces exerted by the single fiber optic. The enhanced compliance reduces the stoutness required of the fiber optic enabling a reduction in the size of the single fiber optic, thereby freeing up cross-section of the catheter for other uses. The enhanced compliance also enables tighter and more predictable articulation for better steering dexterity.
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
A61B 1/055 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor combined with photographic or television appliances having rod-lens arrangements
A61B 1/07 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
20.
DEVICE AND METHOD FOR HIGHLY EFFICIENT HARD AND SOFT TISSUE ABLATION
System and method for use in a laser lithotripsy procedure. The system can include a laser source configured to generate pulsed laser energy, art optical fiber configured to direct the pulsed laser energy at a target, and a controller. The controller Is configured to receive input parameters, determine at least one procedure parameter, and calculate an N -factor (Nf) that corresponds to a number of laser pulses delivered to a treatment zone on the target and having a diameter approximately equal to a diameter of a. laser crater created by the pulsed laser energy. Nf is compared to a maximum N-factor value (Nfmax) and in response to a comparison a laser operating parameter is either adjusted or is used to control the laser source.
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
21.
METHOD AND APPARATUS FOR SAFE AND EFFICACIOUS TREATMENT OF UROLOGICAL CONDITIONS WITH LASER ENERGY
A laser system that includes a processing laser configured to generate a laser beam, a beam delivery system configured to direct the laser beam at a target, a user input device configured to receive input from a user, and a controller coupled to the processing laser and the user input device and configured to: receive initial user input data from the user input device, the initial user input data including at least one of: one or more properties of the beam delivery system, and one or more properties of the target, determine at least one initial laser operating parameter value and a corresponding initial laser operating parameter range based on the initial user input data, and electronically stored information, and control the processing laser using the at least one initial laser operating parameter value.
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
22.
AN APPARTUS AND METHOD FOR FRACTIONAL ABLATIVE TREATMENT OF TISSUE
A device for performing treatment of biological tissue that includes a laser system configured to provide a laser beam having a wavelength within a range of 3.0 microns (μm) to 3.25 μm inclusive and a spot size within a range of 10 μm to 45 μm inclusive, and a controller coupled to the laser system and configured to scan the laser beam over the biological tissue in an injury pattern, the injury pattern having a pitch that is sized to be in a range of 0.1 mm to 1 mm inclusive.
A61B 18/22 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
23.
SYSTEMS AND METHODS FOR CONTROLLING LASER TREATMENTS USING REFLECTED INTENSITY SIGNALS
A method for controlling a surgical laser system that includes providing a surgical fiber configured to receive light reflected from a target in a surgical treatment area, and providing a computing device configured to couple with at least two photodetectors, each photodetector configured to detect an intensity of reflected light from the target in a different selected wavelength band, the computing device further configured to: receive the reflected light intensity in at least two selected wavelength bands, generate optical data corresponding to the reflected light intensity, and identify the target as a treatment target or a non-treatment target based at least in part on the optical data and a predetermined calibration based on at least two known targets.
A system for controlling pressure within a kidney that includes an irrigation channel configured with a pressure sensor, a distal end of the irrigation channel in fluid communication with an interior of a kidney, an aspiration channel in fluid communication with a drain reservoir, a distal end of the aspiration channel in fluid communication with the interior of the kidney, and a controller configured to: determine a fluid flow rate of irrigation fluid within the irrigation channel and receive a pressure measurement value from the sensor, calculate a pressure within the interior of the kidney based at least in part on the determined fluid flow rate and the pressure measurement, compare the calculated kidney pressure to a target kidney pressure value, and based on the comparison, control at least one of the fluid flow rates of irrigation fluid in the irrigation channel and the aspiration channel.
A61M 1/00 - Suction or pumping devices for medical purposesDevices for carrying-off, for treatment of, or for carrying-over, body-liquidsDrainage systems
25.
MATERIAL PROCESSING FUNCTIONALITY IN HANDHELD LASER SYSTEM
A nozzle assembly for performing material processing operations with a handheld laser system on a surface of a workpiece. The handheld laser system comprises a laser source configured to generate laser radiation, a handheld device that guides the laser radiation, and an optical fiber coupling the handheld device to the laser source, and the nozzle assembly comprises a nozzle configured to deliver the laser radiation to the surface, and a coupling mechanism that includes a retaining portion formed on an output end of the handheld device, and an engagement portion configured to be releasably attachable to the nozzle and engage with the retaining portion.
Laser wavelength detectors for use with surgical apparatus and instruments for the treatment of urologic diseases; lasers for medical purposes; laser fibers for medical purposes
A launch connector of a laser light energy coupling has a housing containing an optical connection portion with an optical fiber. The optical connection portion compliantly positioned by an elastomeric component within the housing at a threaded connection between a nose portion and a grasping portion. An internal retention portion engaged with the nose portion and grasping portion clamps the elastomeric component in the nose portion and further has a tubular portion extending rearwardly to an elastomeric strain relief member at a rearward end of connector. A sleeve seated in the nose portion defines, with the nose portion, an interior conformingly shaped to the optical connection portion with a circumferential gap allowing radial movement of the optical connection portion. The sleeve allowing insertion of the optical connection portion through a forward opening of the nose portion before seating the sleeve. The tubular portion providing a threading guide for the fiber.
G02B 6/42 - Coupling light guides with opto-electronic elements
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
G02B 6/38 - Mechanical coupling means having fibre to fibre mating means
28.
LASER WELDING HEAD WITH DUAL MOVABLE MIRRORS PROVIDING BEAM MOVEMENT AND LASER WELDING SYSTEMS AND METHODS USING SAME
A laser welding head with movable mirrors may be used to perform welding operations, for example, with wobble patterns and/or seam finding/tracking and following. The movable mirrors provide a wobbling movement of one or more beams within a relatively small field of view, for example, defined by a scan angle of 1-2°. The movable mirrors may be galvanometer mirrors that are controllable by a control system including a galvo controller. The laser welding head may also include a diffractive optical element to shape the beam or beams being moved. The control system may also be used to control the fiber laser, for example, in response to the position of the beams relative to the workpiece and/or a sensed condition in the welding head such as a thermal condition proximate one of the mirrors.
The disclosed high power narrow linewidth laser system is configured with a master oscillator power fiber amplifier (MOPFA) architecture.including a single mode single frequency (SMSF) linearly polarized seed outputting a linearly polarized signal at a desired wavelength and. a power fiber amplifier. The laser system further includes a one-piece fiber depolarizer between the seed and power fiber amplifier and is configured to depolarize the linearly polarized signal generated, by the seed. During the amplification of the depolarized signal in the fiber amplifier the onset of a fimr-xvave mixing nonlinear effect is increased so that the fiber amplifier outputs the amplified depolarized signal at an output power in excess of 2 KW with a spectral linewidth which matches that of the linearly polarized signal at an input of the one-piece fiber depolarizer.
A swept-source optical coherence tomography (SS-OCT) system for performing imaging of a sample treated by a material processing beam that includes an interferometer used in combination with a tunable light source that generates an imaging optical signal having a wavenumber k that is variable in time and a sweep rate in a range from 1 kHz to 20 MHz inclusive, an optical detector configured to detect a combined optical signal from the interferometer and generate at least one interferometer output signal, and a processing unit configured to detect a distortion in the at least one interferometer output signal that is created by a time-varying difference in optical path lengths of the interferometer, and in response, apply one or more corrections to the at least one interferometer output signal for purposes of determining at least one feature of a processing region on the sample.
G01B 9/02091 - Tomographic interferometers, e.g. based on optical coherence
G01B 9/02004 - Interferometers characterised by controlling or generating intrinsic radiation properties using two or more frequencies using frequency scans
G01B 9/02055 - Reduction or prevention of errorsTestingCalibration
G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
31.
HIGH-POWER LASER SYSTEM FOR FORMING LASER IRRADIATION ZONE WITH SPECIFIED DIMENSIONS AND POWER DENSITY DISTRIBUTION FOR THERMAL SURFACE TREATMENT APPLICATIONS
A high-power laser system for thermally treating a surface is configured with one or more laser sources generating respective source beams with respective arbitrary powers and at respective wavelengths, The source beams are delivered to a laser head via respective fiber trains which have respective output ends terminated within the laser head. Mounted in the laser head is an optical mixer having its input face opposing the output ends opposing the output ends of respective fiber trains which form together the predetermined spatial arrangement. The optical mixer is configured to receive the source output beams Rom respective output liber ends so as io combine and shape the coupled output beams into at least one system output beam forming a beam spot with the desired FDD and desired shape.
The present invention provides methods and devices for shaped pulse laser lithotripsy to provide a high ablation rate while also minimizing retropulsion of the ablation products. A method and laser system for treating calculi in a human or animal body, comprising: a laser emitting a sequence of laser pulses, the laser being operable in an amplitude-modulation regime in which the laser pulses are emitted: at a constant pulse frequency, and with a periodically varying peak power or pulse energy or peak power and pulse energy with an amplitude modulation period Na equal to the number of pulses in an amplitude periodic group of pulses.
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
33.
SYSTEMS AND METHODS FOR MONITORING AND/OR CONTROLLING SHORT-PULSE LASER WELDING
Systems and methods may be used to monitor and/or control a short-pulse laser welding process involving the formation of a series of heat stakes in the welded materials. The systems and methods use an imaging system, such as an ICI system, capable of obtaining measurements inside the vapor channels during formation of the heat stakes and thus provide stake measurement data representing characteristics of the stakes. The stake measurement data may be used to monitor and/or control the short-pulse laser welding process.
Systems and methods can be used for treating soft tissue. The system can indude a laser configured to emit pulsed laser energy that can be modulated to maximize the ablation efficiency during the cutting, incision, or excision of soft tissue while at the same time optimizing hemostasis and reducing collateral side effects such as tissue charring and scar formation. According to certain aspects, a coagulative laser mode power is adjusted mainly for hemostasis without dehydration, and an ablative laser mode power is optimized for providing efficient ablation.
A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
35.
LASER EMISSION MODULATION FOR TREATMENT OF CALCULI
Laser-based systems and method for tTeai.m.ent of calculi. The system can include a laser configured to emit pulsed laser energy and -a controller configured to control the laser. The laser pan be modulated io operate in one of a dusting, fragmentation, or reduced rstropulsion operational mode. One or more of these operational modes inchide pulses comprised, of sub-pulses.
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
36.
SYSTEMS AND METHODS FOR MONITORING AND/OR CONTROLLING SHORT-PULSE LASER WELDING
Systems and methods may be used to monitor and/or control a short-pulse laser welding process involving the formation of a series of heat stakes in the welded materials. The systems and methods use an imaging system, such as an ICI system, capable of obtaining measurements inside the vapor channels during formation of the heat stakes and thus provide stake measurement data representing characteristics of the stakes. The stake measurement data may be used to monitor and/or control the short-pulse laser welding process.
An irrigation and aspiration system that includes a catheter shaft having a distal end that is in fluid communication with an interior of a kidney, an irrigation channel and an aspiration channel extending through the shaft, a bypass channel fluidly coupled with the irrigation channel and the aspiration channel a bypass valve configured to control a level of fluid communication between the irrigation and aspiration channels via the bypass channel, an aspiration pump, at least one valve disposed on the aspiration channel and configured to provide a pulsed flow of fluid in the aspiration channel, a pressure sensor in fluid communication with an interior of the kidney, and a controller configured to: receive at least one pressure measurement, compare the measured pressure to a threshold, and based on the comparison, send a control command to at least one of the bypass valve, aspiration pump, and the at least one valve.
A61M 1/00 - Suction or pumping devices for medical purposesDevices for carrying-off, for treatment of, or for carrying-over, body-liquidsDrainage systems
A method and device that inelude. a multiwindow cartridge assembly that can be used for protecting optica! assemblies in a laser head. The muUiwindow cartridge assembly includes a window mount configured to support and rotate a transparent window about a roiafitm axis, an aperture configured for permitiirsg passage of a processing l aser beam along an optical axis, the optical axis passing through a processing position on the transparent window, a housing for enclosing at least a portion of the transparent window and the window mount arid configured to form at least a. portion of the aperture, and a rotation mechanism configured to engage with at least a portion of the window motmt for rotating the transpar&ttt window about the rotation axis to rotational positions, the rotational positions including the processing position.
Methods and systems are provided for using optical interferometry in the context of material modification processes such as surgical laser or welding applications. An imaging optical source that produces imaging light. A feedback controller controls at least one processing parameter of the material modification process based on an interferometry output generated using the imaging light. A method of processing interferograms is provided based on homodyne filtering. A method of generating a record of a material modification process using an interferometry output is provided.
A method and system for cleaning a surface using laser radiation is provided. In one example, a system for cleaning a surface using laser radiation includes a laser source configured to generate laser radiation, the laser source configured to emit laser radiation in a cleaning mode, the cleaning mode characterized as a modulated continuous wave (CW) mode having a duty cycle less than 110%, pulse-repetition frequency greater of at least 10 kilohertz (kHz), and a FWHM pulse duration in a range of 1 microsecond (μs) to 10 (milliseconds) ms inclusive, a housing configured as a handheld apparatus that directs the later radiation to the surface, and an optical fiber coupling the handheld apparatus to the laser source.
09 - Scientific and electric apparatus and instruments
Goods & Services
Personal protective equipment, namely protective masks, helmets and respirators, protective barriers being protective face shields for workers to prevent against accidents and injury; clothing and gloves for protection against accidents and injury for use in fusing, cleaning, polishing, and cutting of metal parts; safety eyewear
09 - Scientific and electric apparatus and instruments
Goods & Services
Personal protective equipment, namely protective masks, helmets and respirators, protective barriers being protective face shields for workers to prevent against accidents and injury; clothing and gloves for protection against accidents and injury for use in fusing, cleaning, polishing, and cutting of metal parts; safety eyewear
This invention is a broadband intra cavity laser mode convertor. This is a hologram of a complex phase mask imprinted inside of a volume Bragg grating with wide spectral width recorded in photo-thermo-refractive (PTR) glass. This hologram is a broadband phase converting monolithic device capable of use over a broad wavelength range at high instant and average power because of low absorption coefficient and low nonlinear refractive index of PTR glass. Therefore, it can be used for broadband optical beam transformations and conversion of modes in laser resonators.
A laser system is configured with at least one light amplifying device sequentially outputting a light signal at first and at least one additional operating wavelengths over respective time intervals. Each time interval is shorter than the predetermined lifespan of the light amplifying device. The total useful life of the light amplifying device, operating at a plurality of wavelengths, is 3-10 times longer than the predetermined lifespan.
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
A beam shaper includes upstream and downstream fibers fused together at a splice angle different from a zero angle and controllably increased to provide a transformation of a Gaussian intensity distribution profile at an input of the upstream fiber to an intensity distribution profile including one of flattop, inverse Gaussian and donut-shaped profiles at an output of the downstream fiber. The fibers are selected from SM, MM passive and active fibers with the downstream fiber being a multimode fiber.
Controlling a low-threshold femtosecond supercontinuum (fs SCG) in a bulk nonlinear material (BNLM) with a positive thermo-optic coefficient (dn/dT>0 K−1) is provided by coupling light at a first wavelength output by a fs oscillator at a full pulse repetition PRR into the BNLM. The coupling of light produces a nonlinear lens of the coupled beam in the BNLM which is insufficient to provide intensity of the light sufficient to reach ta threshold of the fs SCG. To raise the pulse energy and reach the SCG threshold, light at a second wavelength different from the first wavelength is absorbed in the BNLM to form a thermal lens in the BNLM which assist the nonlinear lens in creating the SCG.
G01J 3/453 - Interferometric spectrometry by correlation of the amplitudes
G01N 21/35 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
52.
COMPUTATIONAL DUAL COMB BROADBAND SPECTROSCOPY METHOD AND SYSTEM
The DCS includes a pair of optical frequency combs (FC) which generate respective outputs at different pulse repetition frequencies (FRF) in a monitoring regime mode characterized by free running FCs. The outputs are combined in a single output which is split between sample- investigating (SI) and reference channels with the latter including a cell with etalon material which has a known etalon spectrum at low pressure. The etalon spectrum contains one or more broadly spaced apart, high intensity narrow molecular lines. Upon interacting with one of the beams, the cell emits a cell signal detected by a photodetector. The cell signal is processed in a data processing unit operative to mathematically filter out a single molecular line of the etalon spectrum and correct the phase change in the filtered line. The corrected phase change is used to restore the desired spectrum of the cell signal and further the desired spectrum of the SI signal.
G01N 21/35 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
53.
OVENS FOR NONLINEAR OPTICAL CRYSTALS AND METHOD OF USE
A system for wavelength conversion. In certain example an oven for a nonlinear optical (NLO) crystal includes a thermally conductive enclosure configured to define an opening for holding the NLO crystal and to thermally conduct heat between a heating element and the NLO crystal, the thermally conductive enclosure in thermal contact with at least a portion of the NLO crystal and the heating element configured to heat to a temperature of at least 250 °C inclusive, a support structure configured to support the thermally conductive enclosure, the support structure thermally isolated from the thermally conductive enclosure, and an expandable attachment assembly configured such that the NLO crystal is secured within the opening of the thermally conductive enclosure by a spring force exerted by the expandable attachment assembly.
A surgical laser system includes a surgical optical fiber optically coupled to a light source and a light detector configured to receive a portion of light reflected from a treatment target and generate optical data corresponding to the portion of the reflected light interacting with the light detector. The system also includes a computing device configured to analyze the optical data relative to characteristic criteria, and based on the comparison of the optical data to the characteristic criteria, control operation of a laser source.
A61B 18/22 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor
55.
APPARATUS FOR SPECTRALLY COMBINING BROADBAND LASER BEAMS BY VOLUME BRAGG GRATINGS
A spectral beam combiner includes at least one transmitting volume chirped Bragg grating (TVCBG) which 1. diffracts a first broadband beam propagating at one central wavelength, which satisfies the Bragg condition, and incident on the TVCBG at one of (+) (−) Bragg angles, and 2. transmits at least one second broadband beam propagating at a second central wavelength, which does not satisfy the Bragg condition. The second broadband beam is incident on the TVCBG at the Bragg angle which is opposite to the one Bragg angle of the first broadband beam. The TVCBG is configured to eliminate divergence of the first broadband beam, which is resulted from dispersion of the one TVCBG, in a plane of diffraction, and combine the first diffracted and second transmitted broadband beams into a first single high-power collimated broadband output beam.
A handheld laser system. In certain examples the handheld laser system includes a laser source emitting laser light at a wavelength for performing a material processing operation on a workpiece material with a laser beam of the emitted laser light, a plasma sensor configured to detect plasma emitted from the workpiece material during a material processing operation, and a controller coupled to the plasma sensor and configured to: compare an optical intensity value obtained by the plasma sensor to a threshold value at a time when a predetermined time period has elapsed after the material processing operation has commenced, and produce a control command based on the comparison.
A surface treating method and apparatus include operating a quasi-continuous wave fiber laser and pre-scan shaping the laser beam such that an instantaneous spot beam has predetermined geometrical dimensions, intensity profile, and power; operating a scanner at an optimal angular velocity and angular range to divide the pre-scan beam into at least one sub-beam deflected toward the surface being processed; guiding the sub-beam through a post-scan optical assembly to provide the spot beam with predetermined geometrical dimensions, power, and angular velocity and range, which are selected such that the instantaneous spot beam is dragged in a scan direction over a desired length at a desired scan velocity, which allow the treated surface to be exposed for a predetermined exposure duration and have a predetermined fluence distribution providing the treated surface with a quality comparable to that of the surface processed by an excimer laser or a burst-mode fiber laser.
A beam combiner configured to spectrally combine multiple beams includes at least one pair of identically configured TVBGs. The TVBGs are spaced apart along a light path and aligned at respective “+” and “−” Bragg angles. The upstream TVBGs diffracts a first beam, which is incident thereon at one of the Bragg angles, so that spectral components of this beams diverge from one another defining thus a fan-shaped beam at the output of the upstream TVBG. Upon launching the diffracted first beam to the downstream TVBG at the other Bragg angle, its spectral components again are diffracted but in the direction opposite to that provided by the upstream TVBG. Thus, the dispersion effects in respective TVBGs cancel out each other. Another beam is incident on and transmitted by the downstream TVBG which combines the twice diffracted and transmitted beams into a collimated combined beam.
A beam-shaper for transforming a MM beam with the flattop intensity distribution profile includes an end block which is fused to a downstream end of a fiber outputting the MM beam along a path within a laser head. The beam-shaper further has a collimator mounted to the laser head downstream from the end block. The collimated MM beam is then focused on the working zone with a beam waist characterized by a Gaussian intensity profile. The Gaussian region may be provided in the vicinity of the beam waist by positioning the collimator so that the Gaussian region of the MM flattop beam is located inside the end block and in the focal plane of the collimator. Alternatively, the Gaussian region may be provided within the waist by using a diffractive optical element which transforms the flattop distribution profile into a donut-shaped profile.
The present invention relates in general to spot or point laser welding of overlapping metal workpieces. The present invention relates to a laser welding system comprising a laser welding head (3) and a laser welding method which enable an efficient spot welding of overlapping metal workpieces. The laser welding head (3) of the laser welding system is configured for simultaneously applying a pressure onto the surface of the workpiece and carrying out a screw welding process in a first operating state and for carrying out the screw welding process without applying pressure onto the surface of the workpieces in a second operating state.
A multi-axis robot includes multiple arms. The last arm which is closest to the workpiece has a tip or wrist which is configured to receive an end-of-arm tooling (EOAT) rotatable about the 6th axis of the robot. A mount for supporting a laser head assembly is coupled to the wrist so that the laser head assembly is not rotatable about the 6th axis of the robot.
The invention relates to the field of laser technology and is intended for the provision of stable generation of ultrashort laser pulses. The proposed method and device are implemented in a unidirectional polarizing resonator, at a given level of optical amplification in the active fiber section of an amplifier. The resonator contains a non-linear optical element having two loops with passive thermal compensation by means of special placing together of the asymmetric sections of birefringent fiber. Both loops are thermostatically controlled. The selection and fixing of the temperatures of these two loops, at a given level of optical amplification in the optical amplifier, further ensures the optimal ratio of the linear and non-linear parts of the phase difference between the polarization components of the optical wave at the NOE output, by which there is stable ultrashort pulsing autogeneration with self-excitation at start up each time the laser is switched on.
H01S 3/106 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
H01S 3/1115 - Passive mode locking using intracavity saturable absorbers
A laser head for a high power fiber laser system has a 5 to 10 mm high housing which is provided with a bottom. The housing encloses an input collimator assembly which collimates a single mode pump light at a fundamental frequency and maximum power of 2 kW. The housing further encases a multi-cascaded nonlinear frequency converter receiving the collimated pump light so as to convert the fundamental frequency into a higher harmonic thereof, wherein converted light at the higher frequency has a maximum power of 1 kW. Enclosed in the housing are electronic and light guiding optical components mounted in the housing. The bottom of the housing is an electro-optical printed circuit board (EO PCB) which directly supports the input collimator assembly, multi-cascaded nonlinear frequency converter, electronic and optical components at respective designated locations.
A laser drilling system is configured with a combination of system components including a fiber laser source, laser processing head, dynamic compensator, configured with one or multiple galvanometers, and stage supporting the workpiece to be laser drilled. The system components are all functionally coupled to one another to provide a plurality of trepanned holes in the workpiece each with the desired geometry. The laser head and stage are continuously displaceable relative to one another while the dynamic compensator pivots so as to keep the laser spot and the predetermined drilling location stationary relative to one another over a predetermined period, of time sufficient for drill the hole. The laser source is selected from solid-state lasers configured with a single core or multi-core delivery fiber. The multicore delivery fiber is associated with adjustable mode beam (AMB) lasers to provide annular, polygonal or irregular holes.
Catheter steering handles that are ergonomically designed to enable an operator to reduce hand fatigue. Various ergonomic aspects of the disclosed steering handles include geometries that more naturally conform to the palm of the hand and that enable the hand to be held in a natural, low stress posture during operation of the steering handle. In another aspect of the disclosure, the catheter steering handle is configured so that the operator can release or partially release the grip on the handle, thereby enabling the operator to relax and flex the hand, thereby reducing fatigue.
An instrument for endoscopic applications, including urology. The instrument may include both irrigation and aspiration channels, effective attraction and suction of tissue and body stone fragments, enhanced viewing clarity of the operational area, illumination fibers with steering function for flexible version of the scopes. In some embodiments, a distal head is configured to locate a mouth of the working channel within a viewing angle of the visualization system. In some embodiments, a transparent cap is disposed at the distal end of endoscope to provide an enhanced view of the operational area. Irrigation and aspiration channels may be arranged so that consistent water flow will attract tissue and body stone particles and remove heated liquid. Illumination fibers may be utilized as pull linkages or push-pull linkages for deflection and steering of flexible embodiments of the scope.
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
A61B 1/06 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor with illuminating arrangements
A61B 1/015 - Control of fluid supply or evacuation
A61B 1/018 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
A61B 1/07 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
A61B 1/307 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor for the urinary organs, e.g. urethroscopes, cystoscopes
68.
LASER AND FOIL BASED ADDITIVE MANUFACTURING SYSTEM AND METHOD
A method and system for additive manufacturing is disclosed. In one example, the method comprises (a) positioning a foil layer onto a substrate, (b) laser welding the foil layer to the substrate, (c) laser ablating the foil layer using a pulsed laser beam to remove at least a portion of the foil layer, the pulsed laser beam comprising optical pulses with a pulse duration in a range from 0.5 ps to 10 ps inclusive, and (d) repeating steps (a) to (c) until the 3D component is completed.
B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
B22F 10/36 - Process control of energy beam parameters
B22F 12/43 - Radiation means characterised by the type, e.g. laser or electron beam pulsedRadiation means characterised by the type, e.g. laser or electron beam frequency modulated
B22F 12/50 - Means for feeding of material, e.g. heads
A method and system for additive manufacturing is disclosed. In one example, the method comprises (a) positioning a foil layer onto a substrate, (b) laser welding the foil layer to the substrate, (c) laser ablating the foil layer using a pulsed laser beam to remove at least a portion of the foil layer, the pulsed laser beam comprising optical pulses with a pulse duration in a range from 0.5 ps to 10 ps inclusive, and (d) repeating steps (a) to (c) until the 3D component is completed.
B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
B22F 10/36 - Process control of energy beam parameters
B22F 12/43 - Radiation means characterised by the type, e.g. laser or electron beam pulsedRadiation means characterised by the type, e.g. laser or electron beam frequency modulated
B22F 12/50 - Means for feeding of material, e.g. heads
70.
METHOD AND APPARATUS FOR CONTROLLABLY ADJUSTING BEAM PARAMETERS
A fiber laser source is configured with a plurality of individual fiber lasers which are coupled to one another in series. Each subsequent fiber laser is configured to transmit laser radiation of any of fiber laser or lasers located upstream therefrom. The switching among different operational regimes of the laser source, which includes SM, MM and different MMs and associated therewith beam shape, beam quality and power parameters is provided at high frequency corresponding to on/off switching of each individual fiber laser.
H01S 3/102 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
G02F 1/01 - 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
71.
METHOD AND APPARATUS FOR CONTROLLABLY ADJUSTING BEAM PARAMETERS
A fiber laser source is configured with a plurality of individual fiber lasers which are coupled to one another in series. Each subsequent fiber laser is configured to transmit laser radiation of any of fiber laser or lasers located upstream therefrom. The switching among different operational regimes of the laser source, which includes SM, MM and different MMs and associated therewith beam shape, beam quality and power parameters is provided at high frequency corresponding to on/off switching of each individual fiber laser.
G02F 1/01 - 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
H01S 3/102 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
A laser system includes a high voltage AC-to-DC power converter and one or more current sources coupled to the power converter without a DC-to-DC converter between the current sources and the power converter. Each of the current sources includes a high voltage switch and one or more independent safety shutoffs. A laser module is operably coupled to the one or more current source and configured to emit electromagnetic radiation wherein the one or more safety shutoffs are configured to disable emission of electromagnetic radiation from the laser module when triggered. A current source controller coupled to the safety shutoff(s) is configured to generate enabling signals that enable normal current source operation. The controller includes circuitry configured to measure power across the high voltage switch when the controller instructs the high voltage switch to turn off to determine proper operation of the safety shutoff(s).
36 - Financial, insurance and real estate services
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Warranty services, namely service contracts. Maintenance and repair of laser systems for ablating, cleaning, welding and cutting; remote maintenance and repair of computer hardware, for the diagnosis, correction and recalibration of malfunction. Quality control testing for laser systems; computer systems monitoring services; providing technological information via the Internet in relation to laser systems; providing temporary use of online non-downloadable computer software for use in laser systems control.
36 - Financial, insurance and real estate services
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Warranty insurance services
(2) Maintenance and repair of laser systems for ablating, cleaning, welding and cutting; maintenance of computer hardware; remote maintenance and repair of computer hardware, for the diagnosis, correction and recalibration of malfunction; repair of computer hardware;
(3) Computer systems monitoring services; providing technological information via the internet in the field of laser systems; providing temporary use of online non-downloadable computer software for use in laser systems control; quality control testing for laser systems;
42 - Scientific, technological and industrial services, research and design
Goods & Services
Monitoring for quality control purposes and quality control services for performance of laser systems; computer monitoring service tracking hardware performance and processes for laser systems; providing technological information in relation to machines, namely, information on laser systems, via the Internet; providing temporary use of online non-downloadable computer software for use in machine control
36 - Financial, insurance and real estate services
37 - Construction and mining; installation and repair services
Goods & Services
Extended warranty services, namely, service contracts Maintenance, servicing being maintaining and repair of laser systems; machinery and computer hardware remote maintenance and repair services, namely, malfunction diagnosis, correction and recalibration
77.
LOW HAZARD LASER WELDING SYSTEM WITH DIMPLING FUNCTIONS AND METHOD
The disclosed laser welding system is adapted for welding overlapping coated metal sheets, e.g. Zi- or Zi-alloy coated steel sheets. The disclosed welding system comprises a laser source producing CW or QCW laser beam; a laser beam delivery cable delivering the laser beam to a laser head of the welding system, wherein the laser head is equipped with a hollow pressure piece adapted to press against the surface of the first metal sheet and simultaneously to deliver the laser beam to the surface of the first metal sheet through the hollow pressure piece to create dimples on the surface of the first metal sheet. The hollow pressure piece of the laser head is also adapted to press against the surface of the second metal sheet positioned on the surface of the first metal sheet with the dimples during the step of seam welding the first and the second metal sheets. According to the invention, the power of the laser beam is reduced during the pre- processing dimpling step comparing to the laser beam power during the seam welding processing step.
B23K 26/322 - Bonding taking account of the properties of the material involved involving coated metal parts
B23K 26/352 - Working by laser beam, e.g. welding, cutting or boring for surface treatment
B23K 26/359 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by providing a line or line pattern, e.g. a dotted break initiation line
The disclosed laser welding system is adapted for welding overlapping coated metal sheets, e.g. Zi- or Zi-alloy coated steel sheets. The disclosed welding system comprises a laser source producing CW or QCW laser beam; a laser beam delivery cable delivering the laser beam to a laser head of the welding system, wherein the laser head is equipped with a hollow pressure piece adapted to press against the surface of the first metal sheet and simultaneously to deliver the laser beam to the surface of the first metal sheet through the hollow pressure piece to create dimples on the surface of the first metal sheet. The hollow pressure piece of the laser head is also adapted to press against the surface of the second metal sheet positioned on the surface of the first metal sheet with the dimples during the step of seam welding the first and the second metal sheets. According to the invention, the power of the laser beam is reduced during the pre- processing dimpling step comparing to the laser beam power during the seam welding processing step.
B23K 26/322 - Bonding taking account of the properties of the material involved involving coated metal parts
B23K 26/352 - Working by laser beam, e.g. welding, cutting or boring for surface treatment
B23K 26/359 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by providing a line or line pattern, e.g. a dotted break initiation line
B23K 37/04 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
B23K 101/00 - Articles made by soldering, welding or cutting
An endoscopic device having reduced cross-section and a steering section of enhanced compliance. The device defines a smaller cross-section by eliminating need for pull wires and torsion sleeves. Use of a single fiber optic for steering opens up cross-sectional space to augment both irrigation and aspiration channels within a common catheter shaft. The single fiber optic may be utilized for "pulling" and/or "pushing" on the steering section, thereby providing unidirectional or bidirectional steering with a single fiber or fiber bundle. A distal steering section is configured to enhance compliance in response to the forces exerted by the single fiber optic. The enhanced compliance reduces the stoutness required of the fiber optic enabling a reduction in the size of the single fiber optic, thereby freeing up cross-section of the catheter for other uses. The enhanced compliance also enables tighter and more predictable articulation for better steering dexterity.
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
A61B 1/07 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
An endoscopic device having reduced cross-section and a steering section of enhanced compliance. The device defines a smaller cross-section by eliminating need for pull wires and torsion sleeves. Use of a single fiber optic for steering opens up cross-sectional space to augment both irrigation and aspiration channels within a common catheter shaft. The single fiber optic may be utilized for "pulling" and/or "pushing" on the steering section, thereby providing unidirectional or bidirectional steering with a single fiber or fiber bundle. A distal steering section is configured to enhance compliance in response to the forces exerted by the single fiber optic. The enhanced compliance reduces the stoutness required of the fiber optic enabling a reduction in the size of the single fiber optic, thereby freeing up cross-section of the catheter for other uses. The enhanced compliance also enables tighter and more predictable articulation for better steering dexterity.
A61B 1/07 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
81.
AN APPARATUS AND METHOD FOR FRACTIONAL ABLATIVE TREATMENT OF TISSUE
A device for performing treatment of biological tissue that includes a laser system configured to provide a laser beam having a wavelength within a range of 3.0 microns (μm) to 3.25 μm inclusive and a spot size within a range of 10 μm to 45 μm inclusive, and a controller coupled to the laser system and configured to scan the laser beam over the biological tissue in an injury pattern, the injury pattern having a pitch that is sized to be in a range of 0.1 mm to 1 mm inclusive.
A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
A61B 18/22 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
82.
AN APPARATUS AND METHOD FOR FRACTIONAL ABLATIVE TREATMENT OF TISSUE
A device for performing treatment of biological tissue that includes a laser system configured to provide a laser beam having a wavelength within a range of 3.0 microns (?m) to 3.25 ?m inclusive and a spot size within a range of 10 ?m to 45 ?m inclusive, and a controller coupled to the laser system and configured to scan the laser beam over the biological tissue in an injury pattern, the injury pattern having a pitch that is sized to be in a range of 0.1 mm to 1 mm inclusive.
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
A61B 18/20 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
A61B 18/22 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor
83.
METHOD AND APPARATUS FOR SAFE AND EFFICACIOUS TREATMENT OF UROLOGICAL CONDITIONS WITH LASER ENERGY
A laser system that includes a processing laser configured to generate a laser beam, a beam delivery system configured to direct the laser beam at a target, a user input device configured to receive input from a user, and a controller coupled to the processing laser and the user input device and configured to: receive initial user input date from the user input device, the initial user input data including at least one of: one or more properties of the beam delivery system, and one or more properties of the target, determine at least one initial laser operating parameter value and a corresponding initial laser operating parameter range based on the initial user input data, and electronically stored information, and control the processing laser using the at least one initial laser operating parameter value.
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
A61B 17/00 - Surgical instruments, devices or methods
84.
METHOD AND APPARATUS FOR SAFE AND EFFICACIOUS TREATMENT OF UROLOGICAL CONDITIONS WITH LASER ENERGY
A laser system that includes a processing laser configured to generate a laser beam, a beam delivery system configured to direct the laser beam at a target, a user input device configured to receive input from a user, and a controller coupled to the processing laser and the user input device and configured to: receive initial user input date from the user input device, the initial user input data including at least one of: one or more properties of the beam delivery system, and one or more properties of the target, determine at least one initial laser operating parameter value and a corresponding initial laser operating parameter range based on the initial user input data, and electronically stored information, and control the processing laser using the at least one initial laser operating parameter value.
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
A method includes selecting a period for a volume Bragg grating (VBG) such that a spectral selectivity of the VBG is at least as wide as a spectral width of a broadband light beam that is to be spatially transformed, selecting a desired beam transformation for the broadband light beam, passing a first light beam from a recording light source through an optical device to a volume holographic recording medium where the optical device is configured to induce the desired beam transformation, directing a second light beam from the recording light source to the recording medium, and converging the first light beam and the second beam at a recording angle such that a spatial refractive index modulation profile is recorded in the recording medium that provides the VBG with the selected period, and a phase profile is embedded in the VBG that induces the desired beam transformation for each spectral component within a spectral width of the VBG.
G03H 1/10 - Processes or apparatus for producing holograms using modulated reference beam
G03H 1/02 - Holographic processes or apparatus using light, infrared, or ultraviolet waves for obtaining holograms or for obtaining an image from themDetails peculiar thereto Details
G11B 7/1353 - Diffractive elements, e.g. holograms or gratings
86.
Methods and systems for characterizing laser machining properties by measuring keyhole dynamics using interferometry
A method, apparatus, and system are provided to monitor and characterize the dynamics of a phase change region (PCR) created during laser welding, specifically keyhole welding, and other material modification processes, using low-coherence interferometry. By directing a measurement beam to multiple locations within and overlapping with the PCR, the system, apparatus, and method are used to determine, in real time, spatial and temporal characteristics of the weld such as keyhole depth, length, width, shape and whether the keyhole is unstable, closes or collapses. This information is important in determining the quality and material properties of a completed finished weld. It can also be used with feedback to modify the material modification process in real time.
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
G01B 5/00 - Measuring arrangements characterised by the use of mechanical techniques
A system for controlling pressure within a kidney that includes an irrigation channel configured with a pressure sensor, a distal end of the irrigation channel in fluid communication with an interior of a kidney, an aspiration channel in fluid communication with a drain reservoir, a distal end of the aspiration channel in fluid communication with the interior of the kidney, and a controller configured to: determine a fluid flow rate of irrigation fluid within the irrigation channel and receive a pressure measurement value from the sensor, calculate a pressure within the interior of the kidney based at least in part on the determined fluid flow rate and the pressure measurement, compare the calculated kidney pressure to a target kidney pressure value, and based on the comparison, control at least one of the fluid flow rates of irrigation fluid in the irrigation channel and the aspiration channel.
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
A61B 1/015 - Control of fluid supply or evacuation
A61B 1/307 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor for the urinary organs, e.g. urethroscopes, cystoscopes
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
88.
REMOTE MONITORING OF FLUID PRESSURE IN BIOLOGICAL TISSUE
A system for controlling pressure within a kidney that includes an irrigation channel configured with a pressure sensor, a distal end of the irrigation channel in fluid communication with an interior of a kidney, an aspiration channel in fluid communication with a drain reservoir, a distal end of the aspiration channel in fluid communication with the interior of the kidney, and a controller configured to: determine a fluid flow rate of irrigation fluid within the irrigation channel and receive a pressure measurement value from the sensor, calculate a pressure within the interior of the kidney based at least in part on the determined fluid flow rate and the pressure measurement, compare the calculated kidney pressure to a target kidney pressure value, and based on the comparison, control at least one of the fluid flow rates of irrigation fluid in the irrigation channel and the aspiration channel.
A61B 1/307 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor for the urinary organs, e.g. urethroscopes, cystoscopes
A61B 1/015 - Control of fluid supply or evacuation
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
89.
Monitoring material processing using imaging signal density determined from inline coherent imaging (ICI)
Systems, methods and apparatuses are used for monitoring material processing using imaging signal density calculated for an imaging beam directed to a workpiece or processing region, for example, during inline coherent imaging (ICI). The imaging signal density may be used, for example, to monitor laser and e-beam welding processes such as full or partial penetration welding. In some examples, the imaging signal density is indicative of weld penetration as a result of reflections from a keyhole floor and/or from a subsurface structure beneath the keyhole. The monitoring may include, for example, automated pass/fail or quality assessment of the welding or material processing or parts produced thereby. The imaging signal density may also be used to control the welding or material processing, for example, using imaging signal density data as feedback. The imaging signal density may be used alone or together with other measurements or metrics, such as distance or depth measurements.
B23K 26/03 - Observing, e.g. monitoring, the workpiece
B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
G01B 9/02001 - Interferometers characterised by controlling or generating intrinsic radiation properties
90.
Pre-Welding Analysis and Associated Laser Welding Methods and Fiber Lasers Utilizing Pre-selected Spectral Bandwidths that Avoid the Spectrum of an Electronic Transition of a Metal/Alloy Vapor
EMPA Swiss Federal Laboratories for Materials Science and Technology (Switzerland)
Medtronic, Inc. (USA)
Inventor
Leistner, Matthias
Favre-Bulle, Sebastian
Mashkin, Andrey
Abstract
The present invention benefits from the determination that pre-selected spectral bandwidths that avoid the spectrum of an electronic transition of a metal/alloy vapor allow for welds substantially free from detritus that may discolor the weld. Accordingly, the present invention provides analytical methods, welding methods and fiber lasers configured to provide high quality metal/alloy welds.
H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
H01S 3/08 - Construction or shape of optical resonators or components thereof
H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
91.
METHOD AND DEVICE FOR INCREASING USEFUL LIFE OF LASER SYSTEM
A laser system is configured with at least one light amplifying device sequentially outputting a light signal at first and at least one additional operating wavelengths over respective time intervals. Each time interval is shorter than the predetermined lifespan of the light amplifying device. The total useful life of the light amplifying device, operating at a plurality of wavelengths, is 3 10 times longer than the predetermined lifespan.
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
A nozzle assembly for performing material processing operations with a handheld laser system on a surface of a workpiece. The handheld laser system comprises a laser source configured to generate laser radiation, a handheld device that guides the laser radiation., and an optical fiber coupling the handheld device to the laser source, and the nozzle assembly comprises a nozzle configured to deliver the laser radiation to the surface, and a coupling mechanism that includes a retaining portion formed on an output end of the handheld device, and an engagement portion configured to be releasably attachable to the nozzle and engage with the retaining portion.
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
A method and system for cleaning a surface using laser radiation is provided. In one example, a system for cleaning a surface using laser radiation includes a laser source configured to generate laser radiation, the laser source configured to emit laser radiation in a cleaning mode, the cleaning mode characterized as a modulated continuous wave (CW) mode having a duty cycle less than 100%, pulse-repetition frequency greater of at least 10 kilohertz (kHz), and a FWRM pulse duration in a range of 1 microsecond (µ.s) to 10 (milliseconds) ms inclusive, a housing configured as a handheld apparatus that directs the laser radiation to the surface, and an optical fiber coupling the handheld apparatus to the laser source.
B05B 15/50 - Arrangements for cleaningArrangements for preventing deposits, drying-out or blockageArrangements for detecting improper discharge caused by the presence of foreign matter
B08B 7/00 - Cleaning by methods not provided for in a single other subclass or a single group in this subclass
A method and system for cleaning a surface using laser radiation is provided. In one example, a system for cleaning a surface using laser radiation includes a laser source configured to generate laser radiation, the laser source configured to emit laser radiation in a cleaning mode, the cleaning mode characterized as a modulated continuous wave (CW) mode having a duty cycle less than 100%, pulse-repetition frequency greater of at least 10 kilohertz (kHz), and a FWRM pulse duration in a range of 1 microsecond (µ.s) to 10 (milliseconds) ms inclusive, a housing configured as a handheld apparatus that directs the laser radiation to the surface, and an optical fiber coupling the handheld apparatus to the laser source.
B08B 7/00 - Cleaning by methods not provided for in a single other subclass or a single group in this subclass
B05B 15/50 - Arrangements for cleaningArrangements for preventing deposits, drying-out or blockageArrangements for detecting improper discharge caused by the presence of foreign matter
95.
MATERIAL PROCESSING FUNCTIONALITY IN HANDHELD LASER SYSTEM
A nozzle assembly for performing material processing operations with a handheld laser system on a surface of a workpiece. The handheld laser system comprises a laser source configured to generate laser radiation, a handheld device that guides the laser radiation., and an optical fiber coupling the handheld device to the laser source, and the nozzle assembly comprises a nozzle configured to deliver the laser radiation to the surface, and a coupling mechanism that includes a retaining portion formed on an output end of the handheld device, and an engagement portion configured to be releasably attachable to the nozzle and engage with the retaining portion.
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
Methods and systems are provided for using optical interferometry in the context of material modification processes such as surgical laser, sintering, and welding applications. An imaging optical source that produces imaging light. A feedback controller controls at least one processing parameter of the material modification process based on an interferometry output generated using the imaging light. A method of processing interferograms is provided based on homodyne filtering. A method of generating a record of a material modification process using an interferometry output is provided.
G01N 21/45 - RefractivityPhase-affecting properties, e.g. optical path length using interferometric methodsRefractivityPhase-affecting properties, e.g. optical path length using Schlieren methods
G01B 9/02091 - Tomographic interferometers, e.g. based on optical coherence
B23K 26/03 - Observing, e.g. monitoring, the workpiece
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
B29C 64/268 - Arrangements for irradiation using laser beamsArrangements for irradiation using electron beams [EB]
G01N 21/84 - Systems specially adapted for particular applications
B22F 12/90 - Means for process control, e.g. cameras or sensors
B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
B22F 12/41 - Radiation means characterised by the type, e.g. laser or electron beam
B22F 12/44 - Radiation means characterised by the configuration of the radiation means
An X-ray optical system incorporates a refractometer, interferometer, spectrometer, diffractometer or imaging device for analyzing a sample. The X-ray optical system is configured with a monochromator which is fabricated from low atomic mass metal borates MxByOz crystals, wherein M is low atomic mass metal, and x, y, z are respective atom numbers of metal, borate and oxygen in chemical formula. The metal borates include borates of lithium (Li), sodium (Na) or stronium (Sr).
A61B 6/00 - Apparatus or devices for radiation diagnosisApparatus or devices for radiation diagnosis combined with radiation therapy equipment
G21K 1/06 - Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diffraction, refraction, or reflection, e.g. monochromators
An irrigation and aspiration system that includes a catheter shaft haying a distal end that is in fluid communication with an interior of a kidney, an irrigation. channel and an aspiration channel extending through the shaft, a bypass channel fluidly coupled, with the irrigation channel and the aspiration channel, a bypass valve configured to control a level of fluid communication between the irrigation and aspiration channels via the bypass channel, an aspiration pump, at least one valve disposed, on the aspiration channel and configured to provide a pulsed flow of fluid in the aspiration channel, a pressure sensor in fluid communication with an interior of the kidney, and a controller configured to: receive at least one pressure measurement, compare the measured pressure to a threshold, and based on the comparison, send a control command to at least one of the bypass valve, aspiration pump, and the at least one valve.
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
A61M 1/00 - Suction or pumping devices for medical purposesDevices for carrying-off, for treatment of, or for carrying-over, body-liquidsDrainage systems
An irrigation and aspiration system that includes a catheter shaft haying a distal end that is in fluid communication with an interior of a kidney, an irrigation. channel and an aspiration channel extending through the shaft, a bypass channel fluidly coupled, with the irrigation channel and the aspiration channel, a bypass valve configured to control a level of fluid communication between the irrigation and aspiration channels via the bypass channel, an aspiration pump, at least one valve disposed, on the aspiration channel and configured to provide a pulsed flow of fluid in the aspiration channel, a pressure sensor in fluid communication with an interior of the kidney, and a controller configured to: receive at least one pressure measurement, compare the measured pressure to a threshold, and based on the comparison, send a control command to at least one of the bypass valve, aspiration pump, and the at least one valve.
A61M 1/00 - Suction or pumping devices for medical purposesDevices for carrying-off, for treatment of, or for carrying-over, body-liquidsDrainage systems
A61B 18/26 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibreHand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
100.
METHOD OF LASER BEAM MACHINING OF A TRANSPARENT BRITTLE MATERIAL AND DEVICE EMBODYING SUCH METHOD
The invention relates to laser equipment, specifically pulsed scanning lasers used to cut brittle substrates. The authors propose a method and device for forming a stressed edge in the substrate for cleaving of the substrate, to which end a track of cavities is formed through optically induced breakdown in the body of tire material during its irradiation with a focused laser beam with a fixed focal distance during the course of angled scanning of the laser beam, with longitudinal movement along the length of the substrate. The technical result is: improved strength parameters of products and better quality of straight and oblique edges formed during substrate cleaving, absence of chips and microcracks, high rate of formation of the stressed cleaving edge, which implies faster laser cutting.
B23K 26/55 - Working by transmitting the laser beam through or within the workpiece for creating voids inside the workpiece, e.g. for forming flow passages or flow patterns
B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
