145 results about "Blue laser" patented technology

The invention discloses an intelligent cutting control method and system for blue laser, and the method comprises the steps: carrying out the time domain analysis of the power time sequence data of a blue laser in real time, and obtaining the power fluctuation data; matching the power fluctuation data with a preset defect feature model of the blue laser to determine the defect occurrence probability of the blue laser; under the condition that the defect occurrence probability is determined to be greater than a preset probability threshold value, according to the cutting parameters and the material parameters, determining an initial power compensation parameter and a kerf quality optimization parameter through a compensation parameter calculation model; performing multi-target iterative optimization on the initial power compensation parameter, the kerf quality optimization parameter and the power fluctuation data through a self-adaptive deviation adjustment algorithm to generate a dynamic power control signal; and adjusting the output power and the beam focusing position of the blue laser according to the dynamic power control signal so as to correct the cutting path of the blue laser in real time.

The invention provides europium-doped silicate green fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of luminescent materials. The green fluorescent powder can generate narrow-spectrum green light with the peak value located at 532 nm under excitation of 450 nm blue light, the full width at half maximum is 46 nm, a white light LED device prepared based on the fluorescent powder has a 110% NTSC color gamut, and it is indicated that the green fluorescent powder has excellent application value in backlight display. The saturation threshold value of the fluorescent powder reaches 21.6 W / mm < 2 > under the excitation of 450nm blue laser, and the lumen at the moment reaches 1157.9 lm. The green fluorescent powder disclosed by the invention has the advantages of high luminous efficiency, narrow full width at half maximum, high light saturation threshold under blue laser excitation, high lumen efficiency and the like, and has application feasibility in the aspect of laser display.

The invention belongs to the technical field of medical robots and minimally invasive surgery, and provides a robot control system and method for blue laser vaporization surgery of prostatic hyperplasia. Mapping the nuclear magnetic image volume data to a deformation field under an ultrasonic acquisition coordinate system, and deforming the preoperative nuclear magnetic image to an intra-operative ultrasonic space by using the deformation field to complete image registration; fusing the registered image with a stereoscopic vision system; the spatial depth of the surface of the target tissue is obtained from the endoscopic image so as to supplement navigation information; according to the utility model, the prostate deformation and probe posture change adaptive capacity in an operation is improved, the real-time visual closed-loop regulation and control capacity is improved, and the characteristics of small light spots, shallow heat diffusion, excellent hemostasis and the like of blue laser are combined, so that the vaporization and hemostasis precision in a tiny blood vessel dense area is ensured, and the problems of large tissue trauma and the like are avoided.

The invention relates to the technical field of hybrid bonding, in particular to a laser-assisted hybrid bonding interconnection method, which comprises the following steps of: S1, processing the surface of a wafer to enable the to-be-bonded surface of the wafer to be flat; s2, cleaning a to-be-bonded surface of the wafer, and removing organic pollutants and an oxide layer; s3, aligning and fitting the surfaces to be bonded of the two wafers; s4, enabling the to-be-bonded surfaces to comprise dielectric layers and metal interconnection points, irradiating the dielectric layers with infrared laser, and carrying out the interconnection of the dielectric layers of the two to-be-bonded surfaces; and S5, the metal interconnection points are heated by blue laser, and the metal interconnection points of the two surfaces to be bonded are interconnected. In the hybrid bonding stage, the infrared laser and the blue laser are used for bonding the dielectric layer and the metal interconnection point respectively, partitioned irradiation and differentiated heating of the metal interconnection point and the dielectric layer are achieved, the problems of interface warping, microcracks and other thermal damage are effectively avoided, and the interconnection quality and the packaging reliability are improved.

The invention provides an illumination system and projection equipment. The lighting system comprises a light source module, a wavelength conversion device, a first light guide assembly, a second light guide assembly and a micro-lens array module. The light source module is used for providing a plurality of green and blue laser beams. The wavelength conversion device is used for generating fluorescent light beams. The first light guiding assembly and the second light guiding assembly are used for guiding a fluorescent light beam and a green laser light beam respectively. The fluorescent light beams form fluorescent light spots on the first area of the first side face of the micro-lens array module. The plurality of green laser beams form a plurality of green light spots on a second area of the first side surface of the micro-lens array module. The first region is adjacent to the second region. The illumination system and the projection equipment provided by the invention avoid energy loss and have good light uniformity.

The utility model relates to a laser beam combining device and a projector, the laser beam combining device comprises a first laser assembly, a second laser assembly and a beam combining structure, and the first laser assembly comprises a first green laser and a first blue laser; the second laser assembly comprises a second green laser and a second blue laser; the beam combining structure is used for combining light output by the first laser assembly and light output by the second laser assembly, the beam combining structure comprises a partition diaphragm, the partition diaphragm comprises a first area and a second area which are connected, and blue light output by the first blue light laser device and green light output by the second green light laser device are combined through the first area and then output through the second area; and green light output by the first green light laser and blue light output by the second blue light laser are combined through the second area. According to the invention, by arranging the partition diaphragm, the blue light and the green light of the first laser assembly and the second laser assembly are combined on the same partition diaphragm, so that the optical expansion amount of the combined light is greatly reduced.

The present invention relates to the technical field of semiconductor lasers, and particularly relates to a GaN-based blue laser and a preparation method thereof, including a substrate, on which an N-type GaN layer, an N-type lower confinement layer, an N-type lower waveguide layer, an active region, an upper waveguide layer, a P-type electron blocking layer, a P-type upper confinement layer, and a P-type contact layer are sequentially stacked; the P-type upper confinement layer is composed of at least one U-shaped GaN sub-layer and multiple layers of P-type In x Al y Ga 1‑x‑y N sub-layers stacked and compounded, where 0 ≤ x < y < 1, 0 < x < 1, 0 < x + y < 1. The present invention uses at least one U-shaped GaN sub-layer and multiple layers of P-type In x Al y Ga 1‑x‑y N sub-layers stacked and compounded to form the P-type upper confinement layer, which not only improves the crystal quality of the material, enhances the radiative recombination in the active region of the LD device, thereby improving the output optical power and photoelectric conversion efficiency of the LD, but also reduces the voltage and thermal loss of the LD device, and improves the aging life and other performance of the LD device.

An all-epitaxial, electrically injected surface-emitting green laser operates in a range of about 520-560 nanometers (nm). At 523 nm, for example, the device exhibits a threshold current density of approximately 0.4 kilo-amperes per square centimeter (kA / cm2), which is over one order of magnitude lower than that of previously reported blue laser diodes.

The invention discloses a laser light source-based baffle-free integrated automobile headlamp optical system, which comprises a low-beam laser light source, a high-beam laser light source, a low-beam focusing reflector, a high-beam reflection cup and a high-beam and low-beam light distribution lens, the high-beam and low-beam laser light source comprises a blue laser diode, a laser collimating lens, a laser focusing reflector and a curved reflector embedded with yellow fluorescent powder, and the low-beam focusing reflector and the high-beam reflection cup are used for reflecting light to the lower half portion and the upper half portion of the high-beam and low-beam light distribution lens respectively. The high-beam and low-beam light distribution lens is a double-free-form-surface lens of a segmented structure, the upper half portion of the lens is a two-section symmetrical fan-shaped lens and used for high-beam illumination, and the lower half portion of the lens is a four-section fan-shaped lens and used for low-beam illumination. According to the baffle-free dual-light integrated structural design, the weight of the headlamp can be effectively reduced, the size is reduced, and the system stability is improved.

The invention may be embodied in other forms than those specifically disclosed herein without departing from itMulti-kW-class blue (400-495 nm) fiber-delivered lasers and module configurations. In embodiments, the lasers propagate laser beams having beam parameter products of <5 mm*mrad, which are used in materials processing, welding and pumping a Raman laser. In an embodiment the laser system is an integration of fiber-coupled modules, which are in turn made up of submodules. An embodiment has sub-modules having a plurality of lensed blue semiconductor gain chips with low reflectivity front facets. These are locked in wavelength with a wavelength spread of <1 nm by using volume Bragg gratings in an external cavity configuration. An embodiment has modules having of a plurality of submodules, which are combined through wavelength multiplexing with a bandwidth of <10 nm, followed by polarization beam combining. The output of each module is fiber-coupled into a low NA fiber. In an embodiment a kW-level blue laser system is realized by fiber bundling and combining multiple modules into a single output fiber.

This invention discloses an injection-locked blue laser system, which injects a low-power, narrow-linewidth, and frequency-stable seed light into another high-power, wide-linewidth laser to obtain a high-power, narrow-linewidth, and frequency-stable laser. In this invention, by injecting a 5mW seed light, a 300mW slave light can be locked, and the system has a wavelength adjustment range of 6nm after locking. The main body of the laser system has a volume of 23×22×6cm. 3 After long-distance transport, it only requires adjustment of the internal fiber optic coupler to function normally. The advantages of this invention are: it realizes a portable, tunable 6nm wavelength, 300mW output power, low manufacturing cost, and easy-to-operate 480nm blue laser system. Furthermore, this injection-locking method can also be used in other optical bands, with the output power limited by the performance of the laser diodes within the laser system. This invention provides a new approach for the development of portable high-performance laser systems and has extremely high application value.

The application provides an objective refraction system and method of refractive state, comprising: a laser light source emitting three beams of blue laser, green laser and infrared laser, an optical beam splitter splitting the three beams into a reference light path and a measurement light path; a plane mirror reflecting the reference light path back to the original path and being received by an interference measurement device; a light adjusting device refracting the measurement light path to realize range measurement of a measurement object, the refracted measurement light path being reflected back to the original path by the measurement object and then being received by the interference measurement device; then, the interference measurement device obtains an interference measurement signal according to the incident measurement light path and the reference light path, a data processing device obtains refractive factor data of the measurement object according to the interference measurement signal, and obtains refractive refraction data of the measurement object according to the refractive factor data. The application can realize the ophthalmic examination that can be completed by multiple devices through one measurement, can quickly understand the real state of the eyeball and judge the myopia condition, and improves the myopia examination efficiency.

The invention provides a BC battery bus bar laser welding device and a welding method thereof, and the BC battery bus bar laser welding device comprises a laser composite head which comprises a blue light laser assembly, an infrared laser assembly and a CCD assembly; the blue laser assembly comprises a blue lens, a first reflector and a second reflector; the infrared laser assembly comprises an infrared lens, a third reflector and a red-blue composite lens; the CCD assembly comprises a CCD camera, a CCD monitoring lens and a fourth reflecting mirror which are arranged in sequence; the red and blue composite laser emission source is connected with the laser composite head through a composite optical fiber; the machining platform comprises an X-axis moving assembly, a Y-axis moving assembly and a machining platen. According to the invention, a plurality of bus bars and batteries can be efficiently welded, the uniformity is high, the welding effect is good, surfacing and hole explosion are avoided, the yield is high, the efficiency is high, and the stability is strong.

The utility model relates to the technical field of lasers, and particularly discloses a blue laser, which comprises a leveling device, a shell, a transmission rod, a power device, an optical module, a heat dissipation module, a quick plug, a flow rate adjusting ring, a circuit board, an air tap and a smoke sensor, the transmission rod, the power device, the optical module, the heat dissipation module, the circuit board, the air tap and the smoke sensor are all arranged in the shell, the output end of the power device is connected with one end of the transmission rod, the other end of the transmission rod is connected with the flow speed adjusting ring arranged in the air tap, and the quick plug penetrates through the shell to be connected with the air tap. The smoke sensor is in communication connection with the circuit board, and the leveling device is installed on any side outside the shell. The blue laser can be matched with air flows with different flow speeds according to smog with different concentrations, and scattering influence of the smog on laser is protected to the greatest extent, so that cutting precision is improved.

The invention relates to the technical field of display, and discloses a light source system and projection equipment, the light source system can separate light paths after fluorescence and blue laser are emitted from a fluorescence wheel, the blue laser can pass through a diffusion area of the fluorescence wheel twice for diffusion, the speckle problem can be reduced, and light spots are more uniform; the fluorescent wheel is integrated with a fluorescent area and a diffusion area, so that the driving device can drive conveniently, and the size of the light source system can be reduced.

The invention discloses a device for manufacturing a magnesium-based composite material through a follow-up magnetic field assisted infrared and blue light composite laser additive and application of the device, and belongs to the technical field of metal-based composite material preparation. Through wavelength complementation of infrared laser and blue laser and interaction of thermocurrent driven by a thermoelectric effect and a follow-up magnetic field, the stability of a molten pool in the process of laser directional energy deposition of the magnesium-based material is remarkably improved, the defects of pores and the like are reduced, uniform distribution and ordered orientation of reinforced particles in a matrix are achieved, and the mechanical property of the magnesium-based material is improved. And meanwhile, the yield strength, ductility and compactness of the magnesium alloy material are improved, and the forming process is stable, safe and reliable.

The application provides a gallium nitride-based semiconductor blue laser, which comprises, from bottom to top, a substrate, a lower limiting layer, a lower waveguide layer, an active layer, an upper waveguide layer and an upper limiting layer, wherein a topological interface state layer is arranged between the upper waveguide layer and the upper limiting layer, and the topological interface state layer has breakdown field strength distribution characteristics and electron affinity energy distribution characteristics. Through the specific breakdown field strength distribution and electron affinity energy distribution of the topological interface state layer, a new body boundary energy band is formed, a strong spin center is formed at the interface, the coupling between adjacent interface states and the spin-splitting asymmetry of the electron band structure are enhanced, the spin-orbit torque effect is enhanced, the piezoelectric polarization and the thermal stress mismatch of the laser element are relieved, the valence band step is reduced, the uniformity of the valence band step is improved, the uniformity of the carrier injection into the active layer is improved, and the gain uniformity is improved.

To provide a light source device that can be reduced in size, and a projection apparatus including the light source device.SOLUTION: A light source device 60 comprises: a blue laser diode 71 that emits blue wavelength band light; a red light emitting diode 81 that emits red wavelength band light; a light path switching device 142 that is disposed on a light path of the blue wavelength band light emitted from the blue laser diode 71 and switches the incident blue wavelength band light between a light path in a first direction D1 and a light path in a second direction D2; a fluorescence emitting device 100 that is disposed on the light path in the second direction D2 and has a fluorescence emitting region that emits fluorescence including green wavelength band light using the blue wavelength band light as excitation light; and a light source optical system 140 that guides the blue wavelength band light switched to the light path in the first direction D1 by the light path switching device 142, the red wavelength band light emitted from the red light emitting diode 81, and the fluorescence emitted from the fluorescence emitting region to a combined light path.SELECTED DRAWING: Figure 3

The utility model provides a wireless optical communication transmission device suitable for an underwater unmanned platform, and the device comprises a blue light communication machine and a green light communication machine, the blue light communication machine employs blue laser as a communication carrier to transmit an Ethernet signal, and the green light communication machine employs green laser as a communication carrier to transmit the Ethernet signal, thereby achieving the underwater bidirectional data transmission. According to the utility model, bidirectional data transmission can be realized underwater, and the application of real-time large-capacity data exchange is supported.

The application discloses a laser, a laser light source and a laser projection device, and belongs to the projection display field.The laser comprises a substrate and a plurality of laser units arranged in an array on the substrate.In the application, the laser comprises two rows of laser units, one row of red light laser units for emitting red laser, and the other row of green light laser units for emitting green laser and blue light laser units for emitting blue laser.Under the premise of ensuring the brightness of the laser beam emitted by the laser, the number of laser units in the laser is reduced.Thus, the overall volume of the laser can be effectively reduced, and the volume of the laser projection device integrated with the laser is small.

The invention discloses a fluorescent glass ceramic membrane with high color temperature uniformity and a preparation method and application thereof, and belongs to the technical field of laser illumination and display. A preparation method of a fluorescent glass ceramic membrane with high color temperature uniformity comprises the following steps: S1, uniformly mixing lithium disilicate glass powder, garnet fluorescent powder and an organic solvent to obtain slurry, and coating a substrate with the slurry to obtain an intermediate material; and S2, carrying out two-step heat treatment on the intermediate material to obtain the fluorescent glass ceramic membrane with high color temperature uniformity. The lithium disilicate glass forms an interlocking microcrystalline network structure in the fluorescent glass ceramic through two-step heat treatment by utilizing a nucleation crystallization mechanism of the lithium disilicate glass. The lithium disilicate glass with the microcrystalline interlocking network structure not only can ensure the compactness of a fluorescent glass ceramic film, but also can provide a scattering medium for blue laser, so that the scattering effect of the blue laser in a fluorescent conversion layer is remarkably improved, and the color temperature uniformity of white laser is further improved.

The invention discloses a vehicle lamp multi-objective optimization method, device and equipment based on a particle swarm algorithm, and relates to the technical field of photoelectronics. Comprising the following steps: detecting a communication distance of a front target object and ambient illuminance in real time, and obtaining a minimum emergent luminous flux threshold value in a current vehicle driving mode; the communication distance and the ambient illuminance are taken as environment variables, the laser power, the beam divergence angle and the modulation depth are taken as optimization variables, a particle swarm optimization algorithm is adopted to iteratively calculate a comprehensive evaluation function under the forced constraint that the minimum emergent luminous flux threshold value is met, and a globally optimal control parameter combination is output; generating a high-frequency driving signal according to the optimal modulation depth, and driving a blue laser diode to output a blue laser beam carrying a communication code at the optimal laser power; and dynamically adjusting the projection optical module according to the optimal light beam divergence angle, and changing the divergence angle of the emitted white light illumination light beam. According to the method, the adaptive capacity and the multi-target comprehensive performance of the intelligent vehicle lamp in the dynamic traffic environment are remarkably improved.

After irradiation with the blue laser beam, intervals between the adjacent copper-based foils along the stacking direction in a neighborhood of a molten area generated in the stacked metal foils are smaller than the thickness of each of the copper-based foils.

Provided is a laser processing method capable of ensuring both high welding strength and low current density while suppressing the area of a weld region at the time of welding a current collector foil and a tab lead of a battery. The laser processing method includes a step of laser welding a current collector foil 2 and a tab lead 3 at an end of a battery, wherein the laser welding is performed by radiating laser light selected from a blue laser and a green laser. When a direction in which the tab lead extends from the end of the battery is defined as a first direction, the laser welding is performed such that welds are arranged in a plurality of linear rows perpendicular to the first direction.

The present invention relates to a method for growing a GaN thick film, belonging to the technical field of optoelectronic power devices. The present invention is based on an AIXTRON MOCVD device, grows a GaN material of a certain thickness on one side of a double-polished sapphire substrate, and then grows a GaN material of the same thickness on the other side of the double-polished sapphire substrate. The GaN thickness on both sides of the sapphire substrate is the same, thereby achieving the purpose of reducing thermal expansion, reducing warpage and reducing stress, thereby growing a flat GaN thick film, solving the problem that heteroepitaxial thick films cannot be grown due to high stress, providing a thick film for the preparation of a GaN self-supporting substrate, and being applied to homoepitaxial power devices, blue lasers, etc., to meet the application needs of high-efficiency, new-type, high-power power electronics, optoelectronics and other fields.

The invention provides a light generating system (1000) comprising a first light generating device (1100), a second light generating device (1200), a luminescent material (200), one or more diffusers (710) and a control system (300); wherein the first light generating arrangement (1100) comprises a plurality of first light generating devices (110) configured to generate first device light (111); wherein the first light generating arrangement (1100) comprises a first laser set comprising the plurality of first light generating devices (110); wherein the first light generating device (110) comprises a first laser diode; and wherein the second light generating arrangement (1200) comprises a plurality of second light generating devices (120); wherein the plurality of second light generating devices (120) comprises (a) one or more primary second light generating devices (1210) configured to generate primary second device light (1211), and (b) one or more secondary second light generating devices (1220) configured to generate secondary second device light (1221); wherein the second light generating device (1200) comprises a second laser set comprising the plurality of second light generating devices (120); wherein the plurality of second light generating devices (120) comprises a primary second laser diode and a secondary second laser diode.

The application discloses a blue laser cladding system with a sealed working box, which comprises an equipment box, wherein one side of the equipment box is provided with a cladding chamber, one side of the cladding chamber is provided with a cladding door, one end of the equipment box is provided with a transfer chamber, the transfer chamber is communicated with the cladding chamber, a sealing door is arranged between the transfer chamber and the cladding chamber, the cladding chamber is closed by the cladding door and the sealing door to form a sealed cavity, and one end of the transfer chamber is provided with a transfer door. The application has the advantages that the transfer chamber is arranged on one side of the cladding chamber, the parts are placed in the transfer chamber every time when the parts are taken out or placed, then the air in the transfer chamber is exhausted to form a vacuum cavity, the vacuum environment in the cladding chamber is conveniently connected, the sealing door is opened through an opening door assembly, then the parts in the transfer chamber are placed on a heating base by a conveying assembly and an electric guide rail to wait for cladding work, and the problem that the vacuum environment in the cladding chamber is damaged and the protective gas is lost due to the opening of the cladding door is solved.

The invention discloses a narrow-band emission fluorescent powder-glass composite material for laser fluorescent display as well as a preparation method and application of the narrow-band emission fluorescent powder-glass composite material. The problems of heat accumulation and efficiency attenuation of traditional fluorescent powder under high-power laser irradiation are solved through a rapid compounding process of an ultralow-melting-point glass matrix (SnF2-NaF-P2O5 system) and narrow-band fluorescent powder (such as KSF: Mn and beta-SiAlON: Eu) in cooperation with a dynamic heat dissipation design of a device. Stable light output is achieved under the 50W laser power, the luminous flux reaches 684lm and 4770lm respectively, and the color gamut covers 125% Rec.709 after the blue laser is coupled with blue laser. Meanwhile, the device is suitable for various commercial fluorescent powder and supports the design of a patterned fluorescent rotating wheel. The application bottleneck of traditional fluorescent powder is broken through, and the fluorescent powder is particularly suitable for high-end display scenes such as IMAX cinema, AR / VR immersive display and high-brightness engineering projection.

A laser welding method for stacked metal foils comprising a plurality of stacked copper-based foils, comprising the steps of: vertically stacking the plurality of copper-based foils; arranging the stacked metal foils on a workpiece holder in a blue laser welding system; and irradiating the stacked metal foils with a blue laser beam directed in a prescribed direction. After irradiation with the blue laser beam, a lower end surface of a molten region generated in the stacked metal foils does not curve toward a center side of the molten region in a cross-section of the stacked metal foils along a stacking direction of the copper-based foils.

The invention relates to the technical field of semiconductor lasers, in particular to a GaN-based blue laser and a preparation method thereof.The GaN-based blue laser comprises a substrate, and an N-type GaN layer, an N-type lower limiting layer, an N-type lower waveguide layer, an active area, an upper waveguide layer, a P-type electron blocking layer, a P-type upper limiting layer and a P-type contact layer are sequentially arranged on the substrate in a stacked mode; the P-type upper limiting layer is formed by laminating and compounding at least one U-type GaN sub-layer and a plurality of P-type In < x > Al < y > Ga < 1-x-y > N sub-layers, and x < lt > is greater than or equal to 0; yt; Yt; 1, 0lt; xlt; 1, 0lt; x + y < lt >; 1. According to the invention, the at least one U-type GaN sub-layer and the plurality of P-type InxAlyGa1-x-yN sub-layers are laminated and compounded to form the P-type upper limiting layer, so that the crystal quality of the material is improved, the radiation compounding of the active region of the LD device is improved, the output optical power and the photoelectric conversion efficiency of the LD device are further improved, the voltage and the heat loss of the LD device are reduced, and the aging life of the LD device is prolonged.