72 results about "Blue laser" patented technology

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 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 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.

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.

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 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.

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 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.

This invention discloses a color enhancement method for a single phosphor wheel architecture, comprising a projector using a single phosphor wheel. This projector does not have a color wheel; yellow (Y), red (R), and green (G) are all generated from the phosphor wheel and produced by laser irradiation of phosphors. Blue (B) is generated from the optical path behind the phosphor wheel by creating a hole in the phosphor wheel. The laser irradiation occurs in the optical path system where a blue laser excites the phosphor. The red (R) phosphor produced after irradiation has a poor effect, with a color bias towards orange. Without changing the single phosphor wheel architecture, the color coordinates of red (R) are improved by adding a glass filter to the surface of the red (R) phosphor. To improve the color of a single phosphor wheel, this invention requires adding a filter to the area where color improvement is needed. However, the added filter's refractive index and thickness cause the original focal point to shift backward. This is compensated for by locally processing an aluminum sheet to correct the shift in focal point, allowing each color to achieve its optimal color coordinates and efficiency.

The present application relates to a kind of dual optical path nitrogen dioxide measurement system and method based on blue laser, using dual-wavelength laser cavity enhanced absorption spectroscopy technology, carries out NO2 absorption measurement under 405nm and 410nm wavelength, and combined with high reflectivity optical resonator, improve detection precision and sensitivity.Through dual-wavelength comparison method, using dual-wavelength absorption spectroscopy analysis, calculate absorbance difference, to effectively eliminate the influence of environmental factors on measurement accuracy, improve measurement reliability.Using more than 99.9% high reflectivity mirror, to realize high reflectivity optical resonator enhancement technology, laser is reflected in resonator multiple times, optical path is extended hundreds of times, improve NO2 absorption signal intensity, realize ppb grade ultra-low concentration measurement.Compared with traditional optical method, the system has lower cost, higher accuracy and stronger environmental adaptability, provides an efficient, stable solution for atmospheric pollution monitoring.

The invention provides a micro-nano vibration laser interference dynamics measurement optimization method based on polarization enhancement, which is based on a polarization control system and comprises a laser generator, a reflector, a half slide, a polarization beam splitting cubic mirror, an objective lens, a micro-nano electromechanical resonator, a convex lens, a photoelectric detector, a spectrum analyzer, a network analyzer, a blue laser generator and a long-wave pass filter. Wherein a first quarter-wave slide is arranged between the laser generator and the reflector, a second quarter-wave slide is arranged between the reflector and the half-wave slide, and a third quarter-wave slide is arranged between the polarization beam splitting cubic mirror and the objective lens. According to the optical path enhancement technology based on polarization optimization, the input laser energy is utilized to the maximum extent, and the transmission loss of the laser in the optical path is reduced. The weak response signal of the micro-nano electromechanical resonator in a non-driving thermal vibration state is successfully and substantially amplified and purified, and a better measurement method is provided for deeply researching the dynamic characteristics of the micro-nano electromechanical resonator.

The invention discloses a warship laser lighting system, and relates to the technical field of laser lighting. The lighting system comprises a laser, a lens, an optical fiber, a parabolic mirror and a ceramic assembly which are arranged in sequence. The laser comprises a blue laser and a green laser; the lens comprises a first lens and a second lens; a light hole is formed in the bottom of the parabolic mirror; the ceramic assembly is arranged in the parabolic mirror and comprises fluorescent ceramic, porous ceramic and transparent ceramic which are arranged in sequence. According to the invention, the blue light laser and the green light laser are excited to the surface of the fluorescent ceramic through the optical fiber, the scattering requirements of white light illumination and green light laser are met by designing the surface roughness and the packaging structure of the fluorescent ceramic, and the integration level of the light source is effectively improved.

The invention provides a blue laser remelting plasma spraying coating structure and bonding strength improving method which comprises the steps that S1, a base body with a spraying state coating is placed on the surface of a remelting table, and the focal point of a blue laser beam is adjusted to be located on the surface of the spraying state coating; and S2, carrying out blue laser remelting under the protection of local inert gas, and finally improving the organization structure and the bonding strength of the spraying state coating. According to the method, the tissue structure and the bonding strength of the plasma spraying coating are improved by adopting a blue laser remelting method, and the tissue structure and the bonding strength of the coating are improved.

The invention provides a light generating system (1000) comprising (i) a plurality of light sources (110, 120,...), (ii) a first luminescent material (210) and (iii) a second luminescent material (220), wherein: (a) a first light source (110) is configured to generate first light source light (111) having one or more wavelengths in a blue wavelength range and having a first centroid wavelength (λC1), wherein the first light source (110) is a laser; (b) the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having one or more wavelengths in a green and / or yellow wavelength range; (c) a second light source (120) is configured to generate second light source light (121) having one or more wavelengths in a yellow and / or orange wavelength range and having a second centroid wavelength (λC2), wherein λC2> λC1; wherein the second light source (120) is a superluminescent diode; (d) the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221) having one or more wavelengths in an orange and / or red wavelength range; and (e) in an operational mode, the light generating system (1000) is configured to generate system light (1001) comprising the first luminescent material light (211) and the second luminescent material light (221).

This invention relates to a system and method for synchronously measuring temperature and deformation fields based on laser speckle DIC and temperature field algorithms. The system includes a 3CCD color camera, a lens, a three-band filter, a monochromatic light source, a mechanical support adjustment platform, a tripod, and a computer. It utilizes a blue laser to actively illuminate the test specimen, and the 3CCD color camera acquires color images of the high-temperature specimen surface before and after deformation, containing sub-images of red, green, and blue channels. The temperature field on the specimen surface is calculated by analyzing the sub-images of the R and G channels after deformation using a temperature field algorithm. The strain field on the specimen surface is obtained by analyzing the sub-images of the B channel before and after deformation using digital image correlation methods, thus achieving synchronous measurement of the temperature and deformation fields of the specimen surface. This invention features a simple principle, a compact system structure, and temperature field measurement unaffected by speckle interference. It enables non-contact, high-precision, and synchronous measurement of the deformation and temperature fields of materials under force and thermal loads.

The invention discloses a dual-wavelength laser efficient cladding method, an obtained coating and application, the method adopts red wavelength laser and blue wavelength laser with complementary absorption characteristics to form a composite action light spot with space and energy capable of being independently regulated and controlled through a beam synthesis technology; the red laser carries out coaxial powder feeding and radiation in the direction vertical to the base body so as to provide main body energy needed for forming and metallurgical bonding of a molten pool; and the blue laser is synchronously incident at a paraxial angle of 10-60 degrees with the primary optical axis of the red laser beam, the energy absorption on the high-reflection metal surface is enhanced through the wavelength characteristic of the blue laser, and the blue laser and the red laser cooperatively regulate and control the flowing of the molten pool. Through the coupling effect of the red-blue dual-wavelength laser, the light absorptivity of the surface of the copper alloy can be improved, the powder utilization rate can be increased, the bonding strength of the coating and the matrix can be improved, and the residual stress of the cladding layer can be reduced.

The present invention provides a phosphor wheel, light source device, and projector that can improve light utilization efficiency and reduce laser speckle. [Solution] A phosphor wheel 23 having phosphor regions 23r and 23g that convert the wavelength of blue laser light, and which rotates in response to the drive of a rotation mechanism, comprising a red phosphor region 23r that converts blue laser light to red laser light, a green phosphor region 23g that converts blue laser light to green laser light, and a transparent region 23b that transmits blue laser light, the transparent region 23b transmitting blue laser light through a microlens array.

The invention discloses a small high-brightness strip-shaped light source which comprises a white laser light source module, a light beam collimation module, a light beam expansion module, a heat dissipation module and a circuit module. The white laser light source module comprises a laser diode module, an optical lens 1, a diffusion sheet and a wavelength conversion sheet which are arranged in sequence; the laser diode module located on the heat dissipation module is driven by the circuit module to generate blue laser, the blue laser is focused through the optical lens 1, then is dodging through the diffusion sheet and then enters the wavelength conversion sheet to convert the blue laser into white laser, the white laser is collimated through the light beam collimation module, and finally emergent light spots are expanded into strip-shaped light spots through the light beam expansion module. The light source is applied to the field of machine vision light sources and has the advantages of small light source size, high brightness and large light spot length-width ratio.

The application discloses a gallium nitride-based photonic crystal surface-emitting blue light laser and a preparation method thereof, and the structure comprises a substrate layer, a bottom GaN layer, a porous GaN layer, an AlGaN-n layer, an n electrode, a multilayer quantum well active layer formed by GaN / InGaN pairs, an AlGaN-p blocking layer, a GaN-p layer, a p electrode and a photonic crystal layer. The application proposes that the porous GaN with low and controllable refractive index is used as a cladding layer, the surface etching type photonic crystal structure is combined, and the layer structure design is optimized, so that the active layer and the surface photonic crystal layer can simultaneously have high resonant light field coupling strength, low threshold, high efficiency and high performance light emission are facilitated, and thus a new GaN-PCSEL is realized.

The present invention provides a lighting system that combines tri-color pure lasers and phosphors and a projection device thereof. The lighting system helps to improve the phenomenon of laser speckle and includes a laser light source module, a wavelength converter, a segmented dichroic mirror, and a light homogenizing component. The laser light source module is configured to provide blue, green, and red laser beams. The wavelength converter is configured to reflect the tri-color laser beams and convert the blue laser beam into an excitation beam. The segmented dichroic mirror is configured to reflect the tri-color laser beams and at least a portion of the excitation beam from the wavelength converter. The light homogenizing component is configured to receive and homogenize the tri-color laser beams and at least a portion of the excitation beam from the segmented dichroic mirror to provide an illumination beam.

The invention provides a laser light source and a method for improving the content of vitamin C. The method comprises the steps that red and blue lasers in equal proportion are adopted for supplementing light to the cucumber protected with light, and the illumination intensity of the red and blue lasers reaching top leaves is controlled to be 1-2.0 micromoles * m <-2 > * s <-1 >; the photosynthetic rate of cucumber leaves irradiated by the laser provided by the invention is 30.5 [mu] mol.m <-2 >. S <-1 >, and the photosynthetic rate of the leaves is increased by 13.4%; the vitamin C content of cucumbers is set to be 9.23 mg / 100g, and compared with the vitamin C content of cucumbers which are not irradiated, the vitamin C content of the cucumbers is increased by 32.4%.

The invention discloses a perovskite quantum dot glass film composite material and a preparation method and application thereof. The preparation method comprises the following steps: blending glass powder containing CsPb (BrxI1-x) 3 quantum dots with an organic carrier to obtain heat conduction slurry; spin-coating the sapphire substrate with the heat-conducting slurry; the sapphire substrate coated with the heat conduction slurry is subjected to stepped heat treatment, and the heat treatment comprises a glue discharging step at the temperature of 150-250 DEG C and a high-temperature dense bonding step at the temperature of 500-600 DEG C, so that interface bonding between the glass film and the sapphire substrate is achieved. According to the invention, the interface-bonded perovskite quantum dot glass film is constructed on the sapphire substrate, so that the problem of hot stacking is effectively solved. The prepared composite material has a heat conductivity coefficient as high as 34.81 W / m.k, and a fluorescent color wheel device assembled based on the composite material shows a wide color gamut (the heat conductivity coefficient reaches 93.7% under the Rec.2020 standard) and high working stability under excitation of blue laser, and has a wide application prospect in the field of laser display.

The invention relates to the technical field of laser welding, in particular to an aluminum-titanium dissimilar metal composite laser welding method and an aluminum-titanium welding head. S1, depositing a ceramic film on the surface of the titanium metal part or the aluminum metal part; s2, the aluminum metal part and the titanium metal part are stacked and relatively fixed, and a to-be-welded part is obtained; s3, the blue laser, the point infrared laser and the ring infrared laser are combined and focused to a welding site on the surface of the to-be-welded part, and a composite laser beam is formed; s4, welding the to-be-welded part by keeping the composite laser beam in an oscillating and swinging manner; according to the aluminum-titanium dissimilar metal composite laser welding method and the aluminum-titanium welding head, the porosity and the crack rate in a welding seam can be reduced, and the comprehensive mechanical property of the welding seam is improved.

The application belongs to the field of Raman laser, and particularly relates to a Herriot type multi-pass cell anti-Stokes Raman high peak power blue laser, which comprises a pumping laser, a plano-convex lens A, a Raman cell, a plano-convex lens B and a 45-degree angle dichroic mirror, the pumping laser is a Nd:YAG pulse solid laser, a 532nm pulse laser is used to pump a mixed gas of H2 and inert gas in the Raman cell, three times of focusing are carried out in the Raman cell, and finally a first order anti-Stokes Raman blue laser is output, the conversion efficiency of the first order anti-Stokes Raman blue laser can reach 10-15%, the pulse energy can be more than 50mJ, and the peak power reaches 10MW level. The application has the advantages of simple Raman laser structure, convenient and fast installation and adjustment, and provides a blue laser for generating high peak power blue laser with high cost performance, especially for the blue laser which is difficult to generate by a conventional method.

The application discloses a laser light source device and a projection device, comprising: a laser emitting three primary color lasers and a light combining prism located on the light emitting side of the laser. The light combining prism comprises a light combining surface and a plurality of connecting surfaces. Red laser, blue laser and green laser emitted by the laser are incident to the light combining surface of the light combining prism. The red laser is directly reflected by the light combining surface, while the blue laser and the green laser are incident to the inside of the light combining prism through the light combining surface, repeatedly reflected in the inside of the light combining prism, the optical path of the blue laser and the green laser is increased, and finally emitted at the position of the red laser incidence. Therefore, not only the three color lasers are combined, but also the difference between the divergence degree of the blue laser and the green laser after the optical path is increased and the divergence degree of the red laser is reduced, so that the difference between the combined light spot sizes of the three color lasers is reduced, and the uniformity of the combined light spot is improved.

Provided is a laser processing method capable of ensuring both high welding strength and low current density while suppressing the area of a welding region when welding a current collector foil and a tab of a battery. The laser processing method is characterized by comprising a step of laser welding a current collector foil (2) and a tab (3) at a battery end, the laser welding being performed by irradiation with a laser selected from a blue laser and a green laser. When the direction in which the tab extends from the battery end portion is a first direction, it is preferable that the laser welding is performed in such a manner that the welding sites are arranged in a plurality of linear rows orthogonal to the first direction.

The invention discloses a GaN blue laser, which comprises a chip, a shunting assembly and a heat sink, and is characterized in that the chip comprises a substrate, and a plurality of micro-channels are formed on one side of the substrate through etching; each micro-channel extends along a first direction; the shunting assembly is arranged on one side, where the micro-channel is formed, of the substrate and is connected with the substrate; a cooling working medium inlet and a cooling working medium outlet are formed in the side, away from the substrate, of the flow dividing assembly. A first flow channel and a second flow channel extending in the second direction are formed in the side, connected with the substrate, of the flow dividing assembly. The first flow channel is communicated with the cooling working medium inlet, the second flow channel is communicated with the cooling working medium outlet, and each micro-flow channel is communicated with the first flow channel and the second flow channel; the heat sink is arranged on the side, away from the substrate, of the chip and connected with the chip. According to the invention, double-sided heat dissipation of the GaN blue laser chip is realized, and the junction temperature of the GaN blue laser chip during working is effectively reduced.

1. Name of the product in this design: Laser Instrument (Blue Laser Generation I). 2. Purpose of this design: For use in cosmetic laser devices. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.