118 results about "Green laser" patented technology

The invention discloses an airborne laser radar sounding data processing method and system, and relates to the technical field of marine surveying and mapping and earth observation, and the method comprises the following steps: collecting original full-waveform data of an airborne laser radar sounding system, the original full-waveform data comprising infrared laser channel data and blue-green laser multichannel data; joint denoising processing is carried out on the original full-waveform data to obtain denoised waveform data, and the joint denoising processing comprises background noise modeling and removing based on machine learning and random noise filtering based on frequency domain low-pass filtering; a collaborative joint denoising strategy is formed by fusing background noise modeling based on machine learning and frequency domain low-pass filtering based on signal-to-noise ratio optimization. According to the method, complex background noise can be accurately estimated and removed, random noise can be adaptively filtered out, weak underwater echo signals are reserved to the maximum extent, and the problem of water depth information loss caused by excessive smoothness is effectively avoided.

The invention relates to a system and a method for detecting thermal stress of an aero-engine blade. The system comprises a green laser, a near-infrared laser, and an optical splitter, a scanning control unit, a signal receiver and a processing module which are connected in sequence, the green laser and the near-infrared laser are respectively connected with the optical splitter; the green laser is used for outputting a first laser beam to the engine blade; the near-infrared laser is used for outputting a second laser beam to the engine blade; the optical splitter is used for combining the first laser beam and the second laser beam to obtain a combined beam; the scanning control unit is used for controlling the combined light beam to scan engine blades; the signal receiver is used for receiving an ultrasonic signal and a photoacoustic signal generated by the engine blade based on the combined light beam; and the processing module is used for processing the ultrasonic signal and the photoacoustic signal to generate a detection result. According to the invention, an accurate and efficient three-dimensional visual solution can be provided for the detection of the thermal stress of the aero-engine blade.

The invention relates to the technical field of laser welding, and provides a high-speed laser welding wire box process based on multi-beam synergy, which comprises the following steps: step 1, at least three laser beams are adopted as a synergy composite heat source, a main laser beam is responsible for penetration fusion welding, and an auxiliary laser beam is responsible for preheating, post-heating or molten pool stabilization; when the copper-aluminum dissimilar material is welded, an auxiliary laser beam is switched into a green laser; and 2, assembling a multi-beam optical regulation and control unit comprising a diffractive optical element, a quartz field lens and a galvanometer scanning module, splitting a main beam into one main beam and two auxiliary beams through the diffractive optical element, controlling focal depth fluctuation by the quartz field lens, and realizing accurate movement positioning of a laser beam by the galvanometer scanning module. Through integration of multi-beam collaborative design and an intelligent control unit, remarkable breakthroughs are achieved in the aspects of welding efficiency, quality consistency and process adaptability, firstly, in the aspect of efficiency and process, the welding speed is greatly increased, multi-station synchronous operation of an automatic welding unit is matched, and the welding period of a single-line box is remarkably shortened.

An apparatus and methods are provided for a handgun stabilizer that enables a shooter to very accurately fire a handgun while remaining well protected by a ballistic shield and looking through a bullet resistant viewing window comprising the ballistic shield. A high visibility green laser sight / high output white light illumination system may be mounted onto the handgun for aiming and illumination, with the handgun being precisely and removably mounted to the side of the handgun stabilizer at a location where the handgun's grip can be ergonomically grasped in the shooter's dominant hand, both for operating the handgun and for controlling the position and orientation of the ballistic shield for aiming purposes. An interface that enables the handgun to be precisely and removably mounted to the handgun stabilizer may comprise a quick-draw holster that is mounted directly onto the handgun stabilizer.

The invention discloses a copper-chromium contact with high fusion welding resistance and a preparation method thereof, and belongs to the technical field of contact materials. The preparation method comprises the steps that high-purity electrolytic chromium powder and electrolytic copper powder serve as raw materials, after acoustic resonance powder mixing is conducted, powder upsetting and cold isostatic pressing are conducted in sequence, and a green body is obtained; carrying out gradient sintering and finish machining treatment on the green body to obtain a copper-chromium electrode bar; the copper-chromium electrode bar is subjected to atomization powder making, and copper-chromium alloy powder is obtained; after the copper-chromium alloy powder is sequentially subjected to sheathing, heat treatment, seal welding and hot isostatic pressing sintering, a sheath is removed, and a prefabricated body is obtained; and after the prefabricated body is processed, the surface is remelted by green laser, and the copper-chromium contact with high welding resistance is prepared. According to the method, by improving the purity of the copper-chromium contact and optimizing the morphology and distribution of the chromium particles, the prepared contact is high in purity, the chromium particles are fine and uniform in distribution, the welding resistance and the breaking performance are excellent, and the method is suitable for a high-voltage-grade arc extinguish chamber.

The invention discloses an extremely shallow water blue-green laser sounding dynamic refraction vision correction method, which belongs to the technical field of marine surveying and mapping and underwater detection, is used for laser refraction correction, and comprises the following steps: synchronously acquiring binocular images and inertial measurement unit attitude data, and generating a three-dimensional point cloud; according to a light spot area in the laser emission angle index point cloud, fitting a micro-tangent plane to obtain a water surface original normal vector; calculating a confidence coefficient weight according to the image texture definition, and iteratively calculating an optimal estimation normal vector based on the original normal vector and the weight; calculating a real incident angle according to the optimal estimation normal vector and the laser emitting direction; calculating the direction vector of the underwater refracted light according to the Snell's law; and calculating the underwater three-dimensional coordinates of the target point by combining the propagation distance of the laser in the air and the water and the emission origin coordinates. According to the method, the visual confidence is introduced, so that the problem of data failure when the traditional visual sounding encounters water surface reflection, glare or broken waves is solved, and the robustness under the complex sea condition is remarkably improved.

The invention belongs to the technical field of metal-based composite material additive manufacturing, and particularly relates to ultrasonic-assisted green laser equipment for copper-based diamond cooling fin machining, which comprises a rack, a printing cabin, a green laser machining system, an ultrasonic-assisted system, a powder spreading system, a gas control system, an intelligent control system and an online monitoring system. By integrating a green laser processing system and an ultrasonic auxiliary system, an ultrasonic-green laser-powder multi-energy field coupling processing system is constructed, the wavelength of green laser is 532 nm, the absorption rate of copper is increased, and compared with traditional infrared laser, low-power and high-efficiency melting of copper can be achieved, the diamond graphitization risk is reduced from the angle of a heat source, and the production cost is reduced. Ultrasonic vibration is transmitted to a molten pool through a substrate coupling type structure, by means of the cavitation effect and the acoustic streaming effect, the interface wettability of copper and diamond is effectively improved, the interface bonding force is enhanced, the interface thermal resistance is reduced, meanwhile, grains are refined, pores are eliminated, residual stress is reduced, and the comprehensive performance of the cooling fin is remarkably improved.

The invention belongs to the field of high-thermal-conductivity composite materials, and particularly relates to a 3D printing copper-diamond composite high-thermal-conductivity material and a preparation method thereof.The 3D printing copper-diamond composite high-thermal-conductivity material comprises a copper matrix and diamond particles dispersed in the copper matrix, and the surfaces of the diamond particles are provided with metal coatings; the copper matrix is formed by copper powder with the particle size of 10-100 microns, and the volume fraction of the diamond particles in the composite material is 40%-50%; according to the method, the titanium plating layer is prepared on the surface of the diamond, the stable titanium carbide transition layer is formed through the reaction of titanium and carbon, the interface thermal resistance between the diamond and copper is remarkably reduced, the interface bonding strength is improved, and heat conduction is facilitated. The selected area green laser 3D printing technology is adopted, a green laser device shows remarkable advantages in the field of 3D printing of copper alloy, and the heat conductivity of the prepared composite material can reach and is remarkably higher than that of pure copper by optimizing the diamond volume fraction and 3D printing process parameters.

The invention belongs to the technical field of additive manufacturing, and particularly relates to a diamond / copper radiator manufacturing method based on 3D printing, and the diamond / copper radiator manufacturing method comprises the steps that diamond / copper composite powder is prepared, and the composite powder comprises diamond particles with nano alloying elements attached to the surfaces and spherical copper powder; and under shielding gas, green laser with the wavelength of 532 nm is adopted for conducting selective laser melting scanning on the composite powder, meanwhile, high-frequency ultrasonic vibration is applied to a molten pool in a laser acting area, and a diamond / copper composite material radiator green body is formed through layer-by-layer powder laying, scanning melting, ultrasonic assistance and layer-by-layer accumulation. Copper matrix crystal grains are refined through ultrasonic energy, residual stress in the printing process is reduced, generation of microcracks is effectively restrained, the mechanical property and reliability of a workpiece are improved, the high absorptivity of green laser to copper and the technical advantages of 3D printing are combined, and high-quality 3D printing is achieved. And the radiator with fine structures such as complex three-dimensional micro-channels and ultrathin fins can be integrally manufactured.

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.

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 application discloses a method for correcting the vision of laser refraction in extremely shallow water, and belongs to the technical field of marine surveying and mapping and underwater detection, and is used for laser refraction correction. The method comprises the following steps: synchronously collecting binocular images and inertial measurement unit attitude data, and generating three-dimensional point clouds; indexing a light spot area in the point clouds according to a laser emission angle, fitting a micro tangent plane, and obtaining an original normal vector of the water surface; calculating a confidence weight according to the image texture definition, and iteratively calculating an optimal estimated normal vector based on the original normal vector and the weight; calculating a real incident angle according to the optimal estimated normal vector and a laser emission direction; calculating a direction vector of underwater refracted light according to Snell's law; and combining the propagation distances of the laser in the air and in the water and the emission origin coordinates, and calculating three-dimensional coordinates of a target point on the water bottom. The application introduces visual confidence, solves the problem of data failure of traditional visual depth measurement when encountering water surface reflection, glare or broken waves, and significantly improves the robustness under complex sea conditions.

A novel environment-friendly building facade construction method comprises the steps that a modular prefabricated outer vertical panel is provided, the prefabricated outer vertical panel is made of a recyclable composite material, the composite material comprises, by weight, 60%-70% of regenerated cellulose, 20%-30% of environment-friendly resin and 5%-10% of a nano reinforcing agent, and a porous micro-nano structure is preset on the surface of the prefabricated outer vertical panel; the surface self-cleaning performance is enhanced; a light alloy frame is installed on the base face of the building outer wall, the light alloy frame is made of magnesium-aluminum alloy materials and fixed to the base face of the building outer wall through embedded expansion bolts, and the surface of the frame is coated with an environment-friendly anti-corrosion coating. According to the intelligent mechanical arm system, the multi-axis mechanical arm, the laser positioning module and the pressure sensor are integrated, the laser positioning module calibrates the installation position of a panel in real time through 532-nanometer green laser, it is guaranteed that the installation error is smaller than 0.5 mm in combination with precise control over 50-200-Newton contact force through the pressure sensor, and the construction precision is improved.

The application provides a high-power optical fiber green laser, and belongs to the technical field of optical fiber lasers; specifically comprises a seed source module, which is used for providing a seed light source with adjustable pulse width and frequency, and performing phase modulation on the seed light source to broaden the spectrum; a first amplification unit is connected with an output end optical path of the seed source module and is used for performing power amplification on the seed light; a second amplification unit is connected with an output end optical path of the first amplification unit and is used for performing power amplification on the signal light again; a third amplification unit is connected with an output end optical path of the second amplification unit and is used for performing third power amplification on the laser; a frequency doubling output unit is connected with an output end optical path of the third amplification unit and is used for performing frequency doubling on the laser amplified for the third time, so as to output green laser with a specified divergence angle and spot size. The application improves the SBS threshold from two aspects of phase modulation and shortening the length of the optical fiber, so that the peak power of the optical fiber green laser is higher.

The invention provides a dual-wavelength beam laser composite additive manufacturing device which comprises a powder feeding nozzle, a red light laser, a green light laser and a scanning galvanometer. A red laser beam emitted by the red laser is output by the laser output channel and is focused on the processing surface to form a red light spot; a green laser beam emitted by the green laser is controlled by the scanning galvanometer to enter the red laser beam in a circular swinging mode and is focused on the machining face to form a green light spot, and the formed green light spot is located on the inner side of the red light spot. The invention provides a dual-wavelength beam laser composite additive manufacturing method. A scanning galvanometer is adopted to control a green laser beam to periodically swing in a red light spot coverage area according to a set circular path. According to the method, the dynamics and microstructure of the molten pool are optimized, the thermal gradient and the cooling rate are adjusted, and ideal conditions are provided for high-density manufacturing of materials such as nickel-based high-temperature alloy, aluminum alloy and copper alloy.

The invention discloses a subnanosecond green laser which comprises a subnanosecond green laser body. A base is movably installed at the bottom end of the subnanosecond green laser body, a horizontal adjusting mechanism is arranged in the base, and clamping mechanisms are arranged on the two sides of the base. A mounting seat is movably mounted at the bottom end of the base, a vertical jacking mechanism is arranged between the mounting seat and the middle of the base, and guide mechanisms are arranged at the four corners of the mounting seat and the four corners of the base. When the horizontal position of the subnanosecond green laser body needs to be adjusted, a second rotary knob is twisted, the second rotary knob drives a threaded rod in a transmission groove to rotate, the threaded rod drives a movable block to horizontally move along the interior of the transmission groove when rotating, and when the movable block horizontally moves, the subnanosecond green laser body is driven by a clamping block to horizontally move at the same time; therefore, the purpose of conveniently adjusting the horizontal position is achieved.

The utility model discloses a device for detecting the dirty degree of a large-scale aquaculture net cage, which belongs to the field of large-scale aquaculture and comprises a net cage, a machine is nested at the top of the net cage, a mooring rope is nested outside the machine, and a shell is fixedly mounted at the top of the machine. According to the utility model, a blue-green laser ranging application and net cage fouling condition judgment method and an algorithm for judging the net cage fouling condition by utilizing probability are adopted, and laser measurement is used for judging the underwater net cage fouling condition through cooperative work of the holder and the laser range finder, so that full-position, automatic and real-time detection of the deepwater net cage fouling condition is realized; the net rope pollution degree is reflected through the net rope return proportion of the effective return value in the distance measurement data by utilizing the principle of statistics, and whether the net rope needs to be cleaned or not is judged by detecting the probability of the net rope return data for multiple times and for a long time; therefore, the device has excellent performance in the aspects of automation degree, observation range, detection real-time performance, detection fineness and the like.

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 utility model provides a novel green laser, which comprises a shell body, a plurality of groups of heat sinks are arranged in the shell body, each group of heat sinks comprises a plurality of heat sinks, a heat dissipation gap is arranged between every two adjacent heat sinks, each heat sink is connected with a laser chip, the heat sinks are arranged in the X-axis direction of the shell body, and the heat sinks are arranged in the X-axis direction of the shell body. The laser chip and the first optical lens group are correspondingly arranged; the packaging size is reduced, the heat dissipation performance is improved, installation and production are more convenient, and meanwhile the production cost is reduced.

The application provides a sample detection method, a detection device and a charged particle optical detection system. The sample detection method comprises the following steps: acquiring a surface topography image and cathodoluminescence data of a to-be-detected sample having a dark spot defect; extracting a region in which the cathodoluminescence intensity is lower than a set intensity threshold in each cathodoluminescence image to obtain a dark spot region; and determining failure information of the to-be-detected sample based on the surface topography image, the dark spot region, the corresponding electrical stress of the dark spot region and the corresponding time of the dark spot region. Through the application, dynamic defect detection of a blue-green laser chip is realized.

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 invention discloses a dust remover plate rib structure welding device which comprises a welding platform, a support, a secondary rib laser gradienter assembly, a main rib laser gradienter assembly and a plurality of welding robots, the support is arranged on the welding platform, and the secondary rib laser gradienter assembly and the main rib laser gradienter assembly are arranged on the support. Longitudinal green laser rays emitted by the secondary rib laser level meter assembly intersect with transverse green laser rays emitted by the main rib laser level meter assembly, a welding robot is arranged on at least one side of the welding platform, and compared with the prior art, the working efficiency and the product quality can be improved.

The invention relates to a lighting device (1) comprising: • three light-emitting means (2, 3, 4), each emitting a collimated light beam of various colours, among which a red light-emitting means (4) emits the red colour, • a beam-mixing means (5) combining the three collimated light beams into a combined light beam directed towards a pivoting mirror device (6), • the pivoting mirror device (6) forming, by reflecting said combined light beam, a beam projected onto a projection area (7), • each light-emitting means (2, 3, 4) comprising at least one laser-emitting source (21, 31, 41). The red light-emitting means (4) comprises a blue or green laser-emitting source (41) and a wavelength conversion material (42) capable of converting the blue or green colour into a red colour.

The invention discloses a high-efficiency visible light super-continuum spectrum generation method and device based on a green light pumping gradient refractive index multimode fiber, and belongs to the technical field of fiber laser. According to the method, a pulse green laser is adopted as a pumping source, the pulse green laser is coupled into a parameter-optimized multimode optical fiber with the gradient refractive index, and the gradient refractive index is obtained by exciting the synergistic effect of nonlinear effects such as geometric parameter instability and light beam self-cleaning which are unique in the optical fiber. And the high-flatness super-continuum spectrum covering the whole visible light wave band is directly and efficiently generated. The defects that a traditional photonic crystal fiber scheme is low in conversion efficiency and poor in flatness in the visible light wave band are overcome, the range and shape of an output spectrum can be accurately regulated and controlled by flexibly designing the fiber core radius, the numerical aperture and the length of the fiber, and meanwhile it is guaranteed that an output light beam is close to the diffraction limit through the light beam self-cleaning effect. According to the scheme, the system is simple in structure and high in robustness, and a novel, reliable and practical way is provided for achieving a high-performance visible light super-continuum spectrum light source.

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 application discloses a high-weld-resistance copper-chromium contact and its preparation method, belonging to the field of contact material technology. The preparation method includes: using high-purity electrolytic chromium powder and electrolytic copper powder as raw materials, mixing them via acoustic resonance, and then sequentially passing them through powder pressing and cold isostatic pressing to obtain a blank; subjecting the blank to gradient sintering and finishing to obtain a copper-chromium electrode rod; then atomizing the copper-chromium electrode rod to obtain copper-chromium alloy powder; sequentially passing the copper-chromium alloy powder through cladding, heat treatment, sealing welding, and hot isostatic pressing sintering, and then removing the cladding to obtain a preform; after processing the preform, remelting the surface with a green laser to obtain a high-weld-resistance copper-chromium contact. This method improves the purity of the copper-chromium contact and optimizes the morphology and distribution of chromium particles, resulting in a contact with high purity, fine and uniformly distributed chromium particles, excellent weld resistance and breaking performance, suitable for high-voltage arc-extinguishing chambers.

The application discloses a perovskite laser scribing device, which comprises a base (1), wherein the base (1) is provided with a Y-axis driving part (2) and a mounting rack (3), and the moving end of the Y-axis driving part (2) is provided with a workbench (4); the mounting rack (3) is provided with an X-axis driving part (5), the moving end of the X-axis driving part (5) is provided with a Z-axis driving part (6), and the moving end of the Z-axis driving part (6) is provided with an infrared laser scribing module (7) and a green laser scribing module (8); the infrared laser scribing module (7) is used for emitting infrared laser to perform scribing processing on a workpiece on the workbench (4); the infrared laser scribing module and the green laser scribing module are used for double-light-path processing, the processing efficiency is improved, and meanwhile, the optical path positioning mechanism is used to drive a collection camera to move, so that the collection camera is accurately corresponded with a scribing point, and the processing accuracy is ensured.

The invention relates to the technical field of solid lasers, in particular to a large-energy green laser. The laser comprises a first pumping source, a first pumping coupling device, a second pumping source, a second pumping coupling device, a resonance assembly, a first frequency doubling crystal, a second frequency doubling crystal, a Q-switching device, a first crystal and a second crystal. The resonant assembly is used for forming a laser resonant cavity and further comprises a compensation device. According to the large-energy green laser provided by the invention, the thermal lens effect of the laser crystal can be weakened through the double-pumping double-crystal, so that the fundamental frequency light can be better amplified. And the arranged compensation device can also improve the overall thermal management of the laser by compensating the thermal lens effect, and is beneficial to outputting stable and high-energy laser.

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 discloses an automatic and accurate fish stock feed feeding device and method based on a laser technology. The device comprises seven parts including a laser emitting end, a laser emitting end height adjusting control device, a laser receiving end, a laser receiving end height adjusting control device, a liquid level transmitter, an intelligent controller and a feed feeding machine. The method comprises the steps that the intelligent controller synchronously adjusts the laser transmitting end and the laser receiving end to the water surface according to a culture water body height signal sent by the liquid level transmitter, the laser transmitting end and the laser receiving end are located on the same horizontal plane, and the feed feeding machine is started regularly according to a preset time point; the ingestion intensity of the fish schools is calculated according to the blocking frequency of the blue-green laser signals caused by ingestion of the fish schools, a graded feed feeding strategy is adopted, a corresponding feed feeding strategy is selected according to the ingestion intensity, and accurate feeding is achieved. According to the invention, through multi-channel and high-frequency laser transmission path shielding detection, the ingestion activeness of fish schools is directly quantified.