191 results about "Fiber laser" patented technology

The invention relates to a planning method, device and equipment for treating brain glioma through multi-fiber laser ablation. The method comprises the following steps: according to pre-acquired image information of a target patient and a segmentation result of a tumor region, sequentially performing segmentation sampling processing on the image information to obtain a candidate optical fiber path set; screening the candidate optical fiber path set according to an optical fiber planning objective function and an optical fiber planning constraint condition to obtain an intermediate optical fiber path set, and determining the number of optical fibers required by tumor ablation according to the intermediate optical fiber path set; determining a target optical fiber path set from the intermediate optical fiber path set according to the number of optical fibers required by tumor ablation and a predetermined path evaluation score; the target optical fiber path set at least comprises position information corresponding to each target optical fiber path. The method can improve the tumor ablation rate and reduce the use of optical fibers.

The invention relates to the technical field of fiber laser cutting, in particular to a high-precision fiber laser metal plate cutting method and system, and the method comprises the following steps: obtaining an original capacitance value of a capacitive induction ring; the original capacitance value of the capacitive induction ring is separated into an average capacitance value and a high-frequency vibration signal; extracting a vibration amplitude from the high-frequency vibration signal; according to the non-linear relation between the capacitance value and the distance of the capacitive induction ring, the vibration amplitude and the average capacitance value, direct current deviation caused by high-frequency vibration is calculated; subtracting the direct current deviation from the average capacitance value to obtain a corrected average capacitance value; and controlling the distance between the nozzle and the metal plate according to the corrected average capacitance value. And the cutting quality and the size precision can be improved.

The invention provides a fiber laser interference vibration measurement method and device, and relates to the technical field of fiber laser interference vibration measurement. The laser is divided into reference light and measuring light through the 1 * 2 coupler, the measuring light is divided into multiple paths through the 1 * N coupler, the multiple paths of light are irradiated to the same measuring point from multiple directions through the circulator and the collimation / focusing optical element, a redundant light return channel is constructed, and the light return success rate and interference stability under a rough surface or a curved surface or a diffuse reflection surface are effectively improved. The return light and the reference light are superposed in the interference unit to form interference fringe signals, high-precision vibration displacement data are extracted through signal detection and three-phase demodulation, and the method is suitable for non-contact vibration measurement scenes which are low in cost and easy to deploy.

The invention relates to the technical field of laser control, and discloses a laser control method and device for an ultra-pulse thulium-doped fiber laser operation system, and the method comprises the steps: generating a PWM time-base waveform through an FPGA, and generating a reference duty ratio instruction based on a target pumping current value; the total response delay time of the acousto-optic modulator is calculated, the FPGA sends a trigger pulse to the acousto-optic modulator according to the total response delay time, the gated modulation laser is output to the optical fiber output end to obtain an analog voltage signal, and the analog voltage signal and the numerical value of the target power register are used for calculating a duty ratio correction increment; the duty ratio correction increment and the reference duty ratio instruction are updated to a duty ratio register of a PWM time base waveform, and multiple paths of pump cooperative driving waveforms are output. The technical problems of pump current response lag, acousto-optic modulator triggering jitter and optical power nonlinear saturation in an ultra-pulse thulium-doped fiber laser operation system are solved; and the laser pulse energy stability, the response speed and the long-term reliability are improved.

The invention relates to the technical field of non-linear regulation and control, in particular to a non-linear regulation and control method for a high-power narrow-linewidth multi-tone fiber laser system, which comprises the following steps: analyzing an influence mechanism of key parameters in the multi-tone fiber laser system on a non-linear effect; on the basis of the analyzed influence mechanism, establishing a nonlinear kinetic equation for describing the interaction of the pump wave, the stokes wave and the sound wave by combining a three-wave coupling theory, and forming a nonlinear propagation model; designing a Tab-DDPM generation network based on a nonlinear propagation model, and modeling a reverse mapping relation between a performance index and a design parameter by using a conditional diffusion mechanism to realize prediction of an optimal parameter; and inputting the optimal parameter into the nonlinear propagation model for verification, extracting an actually output performance index, and comparing the actually output performance index with a set target index to realize nonlinear performance evaluation and closed-loop optimization regulation and control. According to the method, the output capability and the signal fidelity of the high-power fiber laser system are effectively improved, and the method has good generalization capability.

The invention belongs to the technical field of fiber laser, and discloses a galvanometer lens bonding calibration device and a bonding calibration method.The galvanometer lens bonding calibration device comprises an optical screen, a bonding unit and a laser emitting unit, the optical screen is provided with a preset qualified area, and the bonding unit comprises a lens clamp, a supporting shaft, a support and a clamping mechanism capable of clamping a galvanometer lens; the two ends of the lens clamp are an assembling hole and a through groove respectively, the two ends of the supporting shaft are a connecting end connected with the support and a matching end detachably inserted into the assembling hole respectively, a driving shaft of the galvanometer motor can be inserted into the assembling hole, the through groove can contain a galvanometer piece and an adhesive, and the laser emitting unit comprises a laser emitter capable of emitting light beams to the reflecting surface. The reflecting surface can reflect the light beam to the optical screen, when the reflecting surface reflects the light beam to the preset qualified area, the parallelism between the reflecting surface and the inner wall of the through groove reaches the preset parallelism, and the galvanometer sheet bonding calibration device achieves calibration of the parallelism between the reflecting surface and the inner wall of the through groove.

A method and system for generating deep ultraviolet (DUV) laser light is disclosed, in one embodiment the DUV laser system includes a fiber laser source configured to emit a poised fundamental laser beam in the near-infrared with a pulse duration of less than 400 femtoseconds (fs), a nonlinear crystal assembly comprising first, second, and third nonlinear crystals that is configured to convert the fundamental laser beam to produce a fifth harmonic laser beam having a wavelength in a range from 200 nanometers (nm) to 230 nm, and at least one compensation plate disposed in at least one position preceding at least one of the first, second, and third nonlinear crystals and configured such that a pair of pulsed laser beams transmitted through the at least one compensation plate are spatially and temporally overlapped within the at least one of the first, second, and third nonlinear crystals.

The application provides an integrated forming machine, and relates to the technical field of button cell manufacturing technology.The integrated forming machine comprises a forming machine body, a positioning assembly is arranged below a laser cutting system, the laser cutting system comprises a laser moving module, a fiber laser head and an ultraviolet laser head are arranged on the laser moving module; and the laser cutting system is used for cutting materials of a jig assembly and forming products. The cutting and jacking assembly of the integrated forming machine can move the jig assembly at the first full-dish stacking assembly to the positioning assembly, and cut the materials in the jig assembly by using the laser cutting system; then the cutting and jacking assembly moves the jig assembly after laser cutting to the discharging assembly, and after the products after cutting in the jig assembly are removed from the discharging assembly, the cutting and jacking assembly moves the jig assembly to the first empty-dish stacking assembly, so that the materials are automatically cut by using the laser cutting system.

1. Name of the product in this design: Marking Machine (Fiber Laser Automatic). 2. Purpose of this design: To mark characters or other markings on the outer surface of optical fibers using laser technology. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention provides a magnetic interface open type fluid chip and a preparation method thereof, and belongs to the technical field of microfluidics and millifluidics. The method comprises the following steps: performing standardization treatment on ferroferric oxide powder to obtain magnetic hydrophobic particles; then wrapping the target liquid with the particles through controllable shaking to form a smooth liquid cake with a magnetic response core-shell structure; dehydrating the smooth liquid cake through programmed stepped heating evaporation treatment to form a wrinkled liquid cake; and finally, cutting and shaping the wrinkled liquid cake by using laser to obtain the magnetic interface open type fluid chip. The magnetic particles form a stable wrapping layer on a liquid-gas interface, so that the chip structure can stably exist in the air without being supported by an oil phase; meanwhile, the optical fiber laser is used for accurately cutting the liquid cake, the channel configuration can be flexibly reconstructed on site according to requirements, and the problems that in the prior art, the environment dependence is high, and the configuration is solidified are effectively solved.

1. The name of the design product: open type coil fiber laser cutting machine. 2. The use of the design product: cutting of stainless steel coil, galvanized coil, cold-rolled coil, hot-rolled coil and other metal sheet materials. 3. The design points of the design product: the shape of design 1, the shape, color and their combination of design 2. 4. The picture or photo that best shows the design points: the perspective view of design 2. 5. The bottom surface of the design product is the part that is not easy to see or cannot be seen during use, so the top view of design 1 and the top view of design 2 are omitted. 6. Design 1 is designated as the basic design. 7. Other circumstances that need to be explained: design 2 of the design requires protection of color.

This invention relates to the field of laser processing technology and discloses a laser cutting process and apparatus for thick-walled tubes combined with electrochemical jet slag removal. The process includes: an automatic buffer material feeding and recovery mechanism pushes a high-temperature resistant ceramic-based inner liner tube into the inner cavity of a thick-walled tube as a buffer material for laser cutting; after cutting, the buffer material is removed, a physical sliding isolation sealing door is closed in conjunction with a flexible clearance pad, and a positive pressure air curtain blowing device is activated to seal the processing area; the thick-walled tube is connected to the anode of a power source, and the inner and outer jet nozzles are connected to the cathode, spraying high-pressure sodium nitrate passivation electrolyte into the residual slag area. The slag removal mechanism, which combines physical shielding at the slag source with electrochemical anodic dissolution and high-pressure liquid flow flushing, eliminates the contact stress caused by mechanical hard cutting and avoids the problem of micro-cracks at the tube wall wear ports; a spatial isolation protection mechanism prevents salt spray from eroding the optical lenses of the fiber laser cutting head and the machine tool transmission guide, completing a non-destructive slag removal operation.

The application provides an optical fiber laser cutting device and belongs to the technical field of optical fiber cutting machines. The device comprises a workbench, a bearing frame arranged on one side of the upper end of the workbench, a laser moving cutting module arranged on the upper end of the inner side of the bearing frame, and a polluted gas treatment module arranged on the bearing frame. The polluted gas treatment module comprises a shell, a plurality of bearing rods, a gas inlet channel and a gas outlet channel, a conveying member, a plurality of traction rollers, a motor rotating part, and a stripping sheet. The shell is fixedly connected to the bearing table through the bearing rods. The lateral sides of the shell are respectively connected to the gas inlet channel and the gas outlet channel. The conveying member is arranged in the shell through the traction rollers. Each traction roller is screwed to the inner wall of the shell. The motor rotating part and one of the traction rollers are fixedly connected. The stripping sheet is provided with a plurality of stripping sheets arranged uniformly on the moving track of the conveying member. The other side of the stripping sheet is provided with a concave frame. The application solves the problem that the existing optical fiber laser cutting device does not treat the polluted gas generated during the cutting process, but directly disperses in the surrounding environment, and cannot protect the surrounding environment.

The application provides a fiber grating mode selection characteristic testing device and method, and the output characteristic of testing light, the output characteristic of reflected light of a to-be-tested fiber grating and the output characteristic of transmitted light of the to-be-tested fiber grating are obtained by using the fiber grating mode selection characteristic testing device, the output characteristic of testing light, the output characteristic of reflected light of a to-be-tested fiber grating and the output characteristic of transmitted light of the to-be-tested fiber grating are compared and analyzed, and the mode selection characteristic of the to-be-tested fiber grating is obtained. The application quantitatively analyzes the characteristic of the fiber grating used in the fiber laser system based on a simple spatial light path, so as to provide technical support for the design of the fiber laser system.

A fiber laser device (1) is provided with: a first excitation light source (12) capable of emitting first excitation light; a first amplification optical fiber (11) to which an active element that absorbs the first excitation light is added, and which amplifies and emits the light of the first wavelength; a second amplification optical fiber (21) to which an active element that absorbs the light of the first wavelength and is the same as the active element added to the first amplification optical fiber (11) is added, and which amplifies and emits the light of the second wavelength; beam combiners (31), (32); and a light attenuation unit (60) that is provided on an optical path between the beam combiners (31, 32) and the first amplification optical fiber (11), transmits light from the first amplification optical fiber (11), and suppresses the transmission of light from the beam combiners (31, 32).

A multiplexed line scanning LiDAR system generates a line scanned image of an object based on distances to the object measured by respective points. The multiplexed line scanning LiDAR system utilizes at least one set of light sources emitted to a fiber laser element to form a line scan pattern to determine the distance and velocity of an object.

The invention provides a lithium battery diaphragm laser slitting device and method, and relates to the technical field of lithium battery diaphragm manufacturing, the device comprises an equipment adjusting support, a diaphragm conveying mechanism, a laser slitting mechanism, a cooling mechanism, a detection mechanism and a control system; wherein the diaphragm conveying mechanism conveys a diaphragm coiled material to be cut to the position below the laser slitting mechanism, the laser slitting mechanism splits the diaphragm coiled material, and in the slitting process, the cooling mechanism cools the slitting position where the laser slitting mechanism splits the diaphragm coiled material; the detection mechanism is used for detecting the slit diaphragm coiled material; and the control system performs control parameter regulation and control on the laser slitting mechanism, the cooling mechanism and the diaphragm conveying mechanism based on a detection result of the detection mechanism. The pulse fiber laser is adopted for cutting, meanwhile, slitting machining of the diaphragm is achieved through tension adjustment and speed synchronous control, slitting heat is taken away in time through the cooling mechanism, and the problems of thermal deformation, carbonization and the like of a diaphragm notch are solved.

The utility model discloses a full-automatic roll material optical fiber laser cutting marking machine which comprises a machine body, a longitudinal axis linear motor module is arranged on the machine body, a transverse axis linear motor module is arranged on the longitudinal axis linear motor module, and a lifting linear motor module is arranged on the transverse axis linear motor module. A laser cutting module is arranged on the lifting linear motor module; a laser cutting module is arranged on the machine body, a blanking groove is formed in the position, located below the laser cutting module, of the machine body, a plurality of supporting plates used for supporting materials to be cut are arranged above the blanking groove, and a gap is reserved between every two adjacent supporting plates. The function is particularly important for high-precision machining processes such as laser cutting, and due to the fact that material deviation not only affects the machining precision, but also possibly causes equipment failures or material waste.

A length of optical fiber suppresses a nonlinear optical process so as to inhibit energy transfer away from a desired laser wavelength. The fiber has a core and a cladding designed to propagate a laser beam at the desired wavelength, alongside a nonlinear laser component having intensity that escalates as a function of distance due to the nonlinear optical process; a series of spaced-apart filters, each configured with a transmission level to redirect a proportion of the nonlinear laser component from the core into the cladding so as to collectively control exponential growth in the intensity of the nonlinear laser component by imparting resets in the intensity at predetermined intervals along the length; and an output configured to provide the laser beam following its suppressed escalation of the intensity and preservation of energy of the laser beam at the desired wavelength.

1. The name of the design product: fiber laser cutting machine. 2. The use of the design product: for cutting of stainless steel, carbon steel, alloy steel, aluminum, aluminum alloy and other metal plates. 3. The design points of the design product: the shape of design 1, the shape, color and their combination of design 2. 4. The picture or photo that best shows the design points: the perspective view of design 2. 5. The bottom surface of the design product is the part that is not easy to see or cannot be seen during use, so the design 1 top view and the design 2 top view are omitted. 6. Design 1 is designated as the basic design. 7. Other circumstances that need to be explained: the color of design 2 is required for protection.

The present application relates to the technical fields of laser cutting, in particular to a five-axis three-in-one optical fiber laser cutting machine, comprising a five-axis linkage mechanism and a machining head, a protection slag removal mechanism is arranged on the machining head, the protection slag removal mechanism comprises: a fixed seat; an abutting frame which abuts on a workpiece during machining; a flexible cover which is sealingly connected between the abutting frame and the fixed seat and forms a protective cover for caging the machining head; and a self-adaptive abutting assembly which is connected between the abutting frame and the fixed seat. The self-adaptive abutting assembly cooperates with the unified locking assembly to combine blowing slag removal and scraping slag removal, so that the molten slag on the surface of the workpiece is fully and timely removed, and during the process of switching the machining angle of the machining head, the self-adaptive adjustment of the working state makes the air outlet disc and the machining head always maintain a stable position state, at the same time, the scraping head always abuts on the surface of the workpiece, and the molten slag on the workpiece is scraped away timely and stably during the process of horizontal movement of the machining head.

This invention relates to the field of laser welding and additive manufacturing technology, and discloses an intelligent controlled wire and powder co-feeding laser welding and additive manufacturing device and method. The device includes a housing, a fiber laser transmission component, a powder feeding mechanism, a wire feeding mechanism, a detection mechanism, and a control mechanism. The powder feeding mechanism includes an annular support plate, a main powder feeding tube, multiple secondary powder feeding tubes, a first angle adjustment component, a second angle adjustment component, and an angle coordination connection component detachably connected between the first angle adjustment component and the multiple second angle adjustment components. The wire feeding mechanism includes a wire feeding gun and a third angle adjustment component connecting it to the housing. This invention obtains the welding angle through the detection mechanism, and the control mechanism adaptively adjusts the angles of the powder feeding tube and the wire feeding gun according to different welding angles, realizing adjustment in flat welding, fillet welding, and overhead welding scenarios. Under large angle deflection, it can be adjusted to the optimal angle matching the current welding direction, overcoming the problem of uneven powder feeding caused by gravity.

The invention provides a multi-wavelength laser therapy apparatus based on dual wavelengths and four laser modes and an optimization method of the multi-wavelength laser therapy apparatus, and relates to the technical field of laser therapy. Self-adaptive optimal matching of thulium-doped ion concentration and optical fiber length in four laser modes is realized, the machine adjusting time is shortened from several hours to several minutes, and a second-level one-key switching mode in an operation process is supported; the high-peak thulium-doped fiber laser pulse output is realized at the same time, the pulse width at a smaller microsecond level is realized, the peak value and the pulse width of the output pulse are closer to those of the existing solid holmium laser, the lithotripsy efficiency is improved, particularly, the effect on soft and hard stones is realized, the whole machine conversion efficiency is improved, the operation stability is improved, and the safe and reliable treatment purpose is achieved.

The invention discloses a gradient metal-laser welding method for curved glass, and belongs to the technical field of glass processing. The method comprises the following steps: pretreating a glass workpiece, performing magnetron sputtering on a high-purity chromium layer as a reactive interface layer, depositing a gradient self-metallization layer, and performing laser interface activation; coating borosilicate glass powder brazing filler metal slurry on the gradient self-metallization layer, fitting a to-be-welded area, carrying out gradient heating to 850 DEG C, carrying out gradient cooling annealing, cooling to room temperature, carrying out local processing on the to-be-welded area of the glass workpiece by adopting continuous optical fiber laser scanning, cooling, and checking whether a welding seam is qualified or not. The gradient metallization layer attached to the curved surface is constructed on the surface of the glass, interface chemical bonding and smooth transition of the thermal expansion coefficient are achieved, and three-dimensional thermal stress is effectively buffered. A self-adaptive laser process is adopted, a curved nickel layer is firstly scanned and activated to enhance wettability, then accurate scanning is carried out along a welding seam to realize structure remelting and refining, and finally a compact high-strength welding seam is formed.

The invention discloses a battery edge beam welding system, and relates to the technical field of power battery manufacturing equipment. The system comprises a conveying unit, a welding unit, a detecting unit, a marking unit and a control system, wherein the conveying unit adopts a multi-runner plate chain structure to realize vertical conveying and caching of edge beams; the welding unit is provided with double workbenches and a double-fiber laser system, and efficient and accurate welding of the square battery edge beam is achieved in combination with a CCD visual positioning and follow-up mechanism. According to the manufacturing method of the high-strength steel battery tray frame, through multi-pass rolling incremental forming, one-time deformation is reduced, and stress deformation is effectively controlled. The full-servo control of the rolling line ensures the accurate control of each pass, and the forming precision is further improved. The laser welding bead process can uniformly distribute welding heat input and reduce local thermal stress concentration, so that stress deformation of assembly tailor welding is reduced, and deformation after welding can be further corrected by combining a shaping and straightening process.

The application discloses a kind of magnesium lithium welding wire surface ultrafast laser pretreatment laser fuse device and method, including welding torch, welding wire supply device and fiber laser head, further include: fiber laser fuse manufacturing system, fiber laser fuse manufacturing system is used to output fiber laser, realize welding wire melting, the molten pool of stable welding piece additive process;Red-green laser layering cleaning system is used to output the high stability ultra-short pulse laser of triangular distribution, realizes the laser cleaning of magnesium lithium alloy welding wire surface;Cleaning process monitoring system is used for welding wire surface quality state feedback;Waste gas treatment system is used to collect the waste gas waste generated in cleaning process;Low-temperature atmosphere system is used to ensure that cleaning process is in low-temperature environment, avoid magnesium alloy dust spontaneous combustion.

This invention discloses an external cavity spectrum synthesis method and system for expanding N-channel fiber lasers to 2N-1-channel, relating to the field of fiber laser spectrum synthesis. Based on the existing external cavity spectrum synthesis scheme for N-channel fiber laser array elements limited by blazed grids, this invention achieves external cavity spectrum synthesis of 2N-1 fiber lasers by inserting a laser beam with a different wavelength between each two adjacent wavelengths of the synthesized laser, thus solving the problem of the limited number of laser array elements in current external cavity spectrum synthesis.

The present application relates to a kind of 4.2K below high vacuum cryogenic atomic force microscope optical path system, the system includes fiber laser collimation optical path system, two sets of optical lever-laser light path XY moving axis body, optical lever structure cage, four quadrant detector.Two sets of the mounting hole total are equipped on the optical lever-laser light path XY moving axis body, wherein the mounting hole total of one of the optical lever-laser light path XY moving axis body is inserted with the fiber laser collimation optical path system, the mounting hole total of another of the optical lever-laser light path XY moving axis body is inserted with the four quadrant detector;The two sides of the optical lever structure cage are connected with the optical lever-laser light path XY moving axis body respectively, and the lower part of the optical lever structure cage is equipped with probe holder, and the upper part is equipped with metal mirror.The present application realizes the convenient use of atomic force microscope under vacuum and low temperature conditions.

1. The name of the design product: fiber laser cutting machine. 2. The use of the design product: for cutting of stainless steel, carbon steel, alloy steel, aluminum, aluminum alloy and other metal plates. 3. The design points of the design product: the shape of design 1, the shape, color and their combination of design 2. 4. The picture or photo that best shows the design points: the perspective view of design 2. 5. The bottom surface of the design product is not easily visible or invisible during use, so the top view of design 1 and the top view of design 2 are omitted. 6. Design 1 is designated as the basic design. 7. Other circumstances that need to be explained: design 2 of the design requires protection of color.