125 results about "Light laser" patented technology

The invention discloses an automobile motor magnetic steel inserting machine based on visual recognition, and belongs to the field of automobile motor machining, the automobile motor magnetic steel inserting machine comprises a base, a display screen, a reflection component and a filter element assembly, a shell is arranged over the base, one side of the shell is connected with the display screen in a penetrating mode, one side of the base is provided with a feeding mechanism, and the other side of the base is provided with a magnetic steel inserting mechanism. The feeding mechanism adjusts and controls the displacement distance of a workpiece according to the machining requirement, and then magnetic insertion operation of automobile motors with different diameters is met. And a piezomagnetic mechanism is arranged in the shell, the piezomagnetic mechanism adjusts the pressing height according to the pressing requirement, so that the magnetic steel is tightly attached to the stator iron core, and the piezomagnetic mechanism ensures that the magnet has no displacement. The industrial camera and the blue light laser are inclined and adjusted through the arc-shaped rack and the gear, the arc-shaped rack adopts helical tooth design, precision gear transmission is combined, inclination angle adjusting precision is achieved, and the requirement of the blue light laser for projection angle deviation is met.

The invention discloses a square groove size measuring device and method based on linear structured light and arc-shaped reflector imaging, the device comprises a base, the base is provided with a bent metal plate base, the base is provided with an arc-shaped reflector mechanism and a rotating platform mechanism, the arc-shaped reflector mechanism comprises a partition plate, a linear laser generator, an arc-shaped reflector and a CMOS camera, the CMOS camera and the linear laser generator are arranged on the partition plate. By introducing an arc-shaped reflecting mirror mechanism and designing the curvature and the mounting angle of the arc-shaped reflecting mirror mechanism, a vertical groove wall in a line structured light laser shadow area is effectively reflected to a camera imaging visual field, so that the imaging range of the vertical groove wall is expanded, and the detectability of local shape change caused by surface micro roughness is enhanced; the technical problems that an effective reflection path is difficult to form when laser irradiates a vertical or nearly vertical groove wall in the horizontal direction, local shape change information caused by surface microcosmic roughness cannot be obtained, and a complete square groove outline cannot be obtained at a time are solved.

The invention provides single-point temperature measurement equipment and a temperature measurement system, and belongs to the technical field of infrared temperature measurement. The single-point temperature measurement device comprises a single-point infrared temperature measurement module, a line laser module fixing support and a line laser module, the line laser module fixing support is connected to the single-point infrared temperature measurement module, and the line laser module is connected to the temperature measurement line laser module fixing support. A single-point infrared temperature measurement module body of the single-point infrared temperature measurement module penetrates through the temperature measurement line laser module fixing bracket and the line laser module; at least two groups of line laser lamps are arranged on one side, penetrating through the single-point infrared temperature measurement module body, of the line laser module, laser emitted by the two groups of line laser lamps intersects to form a light beam, and the light beam is in the axial center direction of the single-point infrared temperature measurement module body. And the single-point temperature measuring equipment realizes accurate positioning of temperature measuring points.

The utility model discloses a solar bird repelling device which comprises an installation box, a fixing plate is fixedly connected to the bottom of the installation box, a fixing structure is arranged on the side wall of the fixing plate, a control module is arranged in the installation box, a storage battery is arranged in the control module, laser lamps are embedded in the two side walls of the installation box, and the laser lamps are connected with the storage battery. One end of each laser lamp penetrates through the side wall of the mounting box, a buzzer is arranged in the mounting box, a plurality of sound transmission holes are formed in the periphery of the mounting box, a vertical rod is fixedly connected to the top of the mounting box, a rotating structure is arranged on the side wall of the outer ring of the vertical rod, and a solar panel is fixedly connected to the top of the vertical rod. Through mutual cooperation of the mounting box, the fixing plate, the U-shaped plate, the extrusion plate and other components, through inclined arrangement of the solar panel and arrangement of the rolling shaft, birds can be prevented from falling on the top of the solar panel, bird repelling in various modes can be achieved through wind power, the bird repelling effect of the device is improved, and practicability is high.

The utility model provides a laser housing and a semiconductor spatial light laser, comprising a front panel and a rear panel which are oppositely and vertically arranged, and two side plates used for connecting the front panel and the rear panel, a first area enclosed by the front panel, the rear panel and the two side plates is used for placing the semiconductor spatial light laser, and a second area enclosed by the two side plates is used for placing the semiconductor spatial light laser. Detachably connected cover plates are arranged at the upper end and the lower end of the first area; and a fixing assembly for mounting the laser housing on the semiconductor device, the fixing assembly being disposed on any one or more of the front panel, the rear panel, and the two side plates. According to the utility model, the independent fixing assembly is arranged, and a proper laser fixing position is selected according to the internal structures of different semiconductor devices, so that the semiconductor devices are convenient to assemble and replace; the water cooling assembly is fixed through the front panel and the rear panel of the laser shell, and then the upper and lower layers of light source modules are installed, so that the double-layer semiconductor light source modules have supporting areas in the assembling process, and optical fibers are prevented from being bent.

The present application relates to the technical field of wood processing, and discloses a high-precision cutting process for woodworking machinery based on laser positioning, comprising the following steps: S1, scanning the surface of wood by a laser sensor to obtain wood data, S2, combining visible light laser and infrared laser, S3, analyzing the characteristics of wood by using an AI algorithm, S4, dynamic compensation of laser error, S5, multi-process collaborative cutting, S6, cooling and heat prevention technology, S7, intelligent environment regulation: real-time monitoring of factory environment parameters to automatically adjust the working state of the laser cutting system, S8, adaptive laser focal length adjustment, S9, adopting an automatic feedback mechanism to record errors in each cutting process in real time. By adopting dual-spectrum laser fusion ranging technology, combining visible light and infrared laser, precise ranging of different wood materials and surface conditions is realized, and the ranging effect is more adaptive and less error, thereby improving the cutting positioning precision.

The utility model discloses a drainage tube fixing device capable of measuring the lifting angle of a bedside, which belongs to the field of medical instruments and comprises a protractor and a ruler strip, the back of the protractor is fixedly connected with a bed board fixing component, the front of the protractor is provided with a sliding groove, and the protractor is movably connected with the ruler strip through a movable shaft. The bottom end of the ruler strip is fixedly connected with the protractor through a locking bolt, and the top end of the ruler strip is fixedly connected with a gradienter; according to the drainage tube fixing device capable of measuring the lifting angle of the bed head, by arranging the protractor, the sliding groove, the ruler strip, the movable shaft, the locking bolt, the gradienter, the movable sleeve, the fixator and the laser lamp, measurement of the lifting angle of the bed head and measurement of the hanging height of the drainage tube can be integrated in the hanging process of the drainage tube; medical staff can conveniently, quickly and accurately find the fixed height of the drainage tube and the lifting angle of the bed head, so that convenience is brought to the work of the medical staff.

The invention relates to the technical field of laser radars, in particular to a vortex light laser radar which comprises a laser emitting unit, an optical receiving unit, an optical modulation unit, a signal detection unit, a signal acquisition and processing unit and a system structure unit. The optical receiving and modulating module divides echo light into a vortex channel and a reference channel through polarization beam splitting. The vortex channel performs orbital angular momentum modulation on echo light by using the receiving modulation unit, converts coherent signal light into annularly distributed vortex light, and filters incoherent noise light through the OAM spatial filtering assembly, thereby realizing spatial separation of signals and noise. The problem of interference of multiple scattered light and background light in a strong scattering medium is effectively solved, the detection signal-to-noise ratio, the maximum detection distance and the target resolution of the laser radar are remarkably improved, and the system is compact in structure, high in engineering practicability and particularly suitable for target detection in underwater, haze and other complex environments.

The present invention discloses a method for generating sound waves in the air using a pulsed laser. The device for generating sound waves is composed of a pulsed laser and an optical modulation system. The pulsed laser is emitted by a pulsed laser and then acts on water vapor in the air after passing through the optical modulation system. The water vapor absorbs the heat energy of the pulsed laser. After the pulsed laser passes through, the water vapor temperature instantly rises and expands, thereby generating pressure waves in the area of ​​action, that is, generating sound waves through the photoacoustic effect. In addition, a three-color visible light laser is used to illuminate the area of ​​action for imaging. The structure of the method for generating sound waves in the air using laser pulses proposed by the present invention is simple. Since water vapor can still be generated even in air with low relative humidity, the effect can be achieved by only following the above steps. The method has research value in the manipulation of microparticles, biological imaging, space imaging, sound communication, and naked-eye three-dimensional display.

The invention discloses an electronic fence system and method for a dewatering belt conveyor, and relates to the technical field of industrial safety, and the system comprises a laser fence which is arranged along the boundary of a dangerous area of the dewatering belt conveyor, adopts the design of emitting visible light to form a visual barrier, and is used for monitoring the light shielding degree when a person enters the dangerous area in real time; and the alarm host is electrically connected with the laser fence and is used for receiving the shielding signal of the laser fence and performing grading processing, and the alarm host judges the shielding degree based on a preset shielding area threshold value. According to the electronic fence system and method for the dewatering belt conveyor, real-time monitoring and visual protection of a dangerous area of the dewatering belt conveyor are achieved by deploying the visible light laser fence, the safety of an operation area is effectively improved, the risk level can be accurately judged according to the personnel shielding degree through a graded early warning and intelligent linkage mechanism, and the safety of the operation area is improved. And sound-light alarm or equipment shutdown is automatically triggered, so that the timeliness of safety protection is enhanced.

The utility model relates to a kind of electric door opening purple light inner engraving laser machine equipment, host module adopts purple light laser, can carry out inner engraving;First Z-axis moving mechanism drives engraving platform to lift, to cooperate host module to carry out three-dimensional laser inner engraving;The distance between engraving platform and host module is adjusted by driving engraving platform to lift to carry out Z-axis movement, lifting load is low, and it is not easy to produce deviation, precision is high.Second Z-axis moving mechanism drives door cover to lift, without manually lifting again, improve work efficiency and security.First Z-axis moving mechanism is guided by Z-axis auxiliary guide rail and auxiliary sliding block, and it is strong in stability, and bearing torque is high;Second Z-axis moving mechanism is guided by Z-axis auxiliary skeleton and sliding wheel, and the stability and smoothness of sliding are guaranteed.Even more, exhaust mechanism is arranged in vertical mounting seat, and gas in working area and generated dust are discharged by exhaust space and second exhaust fan by first exhaust fan, so as to avoid dust generated by laser cutting to interfere with laser work.

The utility model discloses a multifunctional laser performance system which comprises a shell and a heat dissipation substrate fixedly installed at the bottom of the inner wall of the shell and further comprises a light source, a reflecting mirror frame, a rotary electromagnet, a motor, a galvanometer module, a galvanometer, a galvanometer power source, a galvanometer driver, a front panel, a light source driver, a rear panel, a laser controller and a motor controller. According to the utility model, the laser is output to the galvanometer to scan various animation and light beam effects, so that the laser lamp has the advantage of various expression forms, and the problem that the expression form of the existing laser lamp is generally single and the effect of the laser lamp is directly influenced is solved.

The detection system comprises a condensation gun barrel, a gas supply port and a cold head, the cold head is used for reducing the temperature of the pipe wall of the condensation gun barrel, the gas supply port continuously injects raw material gas into the condensation gun barrel, the raw material gas forms a condensation ice layer, a parallel surface light source is arranged at the front end of the condensation gun barrel, and the parallel surface light source is connected with the condensation gun barrel. The parallel surface light source is a visible light laser with the wavelength range of 375nm-940nm, an array type photodiode is arranged at the rear end of the condensation gun barrel, the parallel surface light source emits linear and surface light beams, and the light beams are transmitted in the condensation gun barrel and are received by the array type photodiode. The invention also provides a detection method. The light source generates parallel light beams in front of the condensed ice layer; the light beam is received by the receiver array after penetrating through the condensation ice layer, and whether the condensation projectile is formed or not is judged by judging the intensity of the light received by the receiver array. According to the invention, the molding process of the condensation projectile can be detected in the whole process, the detection accuracy is improved, and artificial judgment and intervention are reduced.

The application provides a Fe3O4 nanoparticle microscopic imaging detection method based on left and right polarization modulation, belongs to the technical field of photothermal science and detection and signal processing, and solves the problems that current nanometer single particles are difficult to observe and physical and chemical characteristics are difficult to obtain, and specifically comprises the following steps: determining a sample to be detected and preparing a slide sample; starting a computer, a data acquisition card, a lock-in amplifier, a galvanometer controller and a function generator; starting a power supply of an excitation light and a detection light laser and a refrigerator; setting detection parameters, setting laser power / current parameters, setting modulation parameters, and scanning and detecting the sample to be detected; loading a magnetic field; reading signals from the data acquisition card by the computer to obtain a photothermal detection result image; changing different laser parameters and the size of the magnetic field, repeating the above steps, obtaining a circular dichroism and magnetic circular dichroism detection result, measuring a magnetization curve, and monitoring a single nanoparticle magnetic moment flipping process.

The present invention relates to a device for water-in-air generation of droplets comprising a collection vessel, a droplet generation device positioned above the collection vessel comprising a piezoelectric transducer (21) and at least one capillary (22) with a nozzle (23) pointing downwards to the collection vessel; a laser source (30) generating a visible light laser beam (31) with tophat profile, and an imaging setup for continuously monitoring the droplet generation (40). Said device is particularly useful for preparing monodisperse giant unilamellar vesicles of any composition and three-dimensional microenvironment niches for cells or synthetic cells in high throughput.

The application provides a laser cladding powder and a method for laser cladding on an aluminum alloy surface, and belongs to the technical field of laser cladding. The laser cladding powder comprises Mo powder, V powder, Al powder, AlB2 powder, CeO2 powder and Ti powder. Since the aluminum alloy substrate and the titanium powder are both non-ferrous metals, the absorption utilization rate of near-infrared light is lower than that of visible light. By adopting a composite light beam composed of blue light and near-infrared light for cladding, the welding heat input can be reduced, the formation of too much brittle hard compound at the interface can be inhibited, and the interface bonding can be ensured. In the cladding process, the spot formed by the near-infrared light laser beam rotates around the spot formed by the blue light laser beam, so that the weld forming can be improved, and defects can be reduced. The method for laser cladding on the aluminum alloy surface can prepare a wear-resistant coating on the aluminum alloy surface, so that the wear resistance of the aluminum alloy surface can be improved.

The invention provides a line structure light laser surface modeling method and a line structure light calibration method, and the line structure light calibration method comprises the following steps: (1.1) collecting data of a calibration laser surface; (1.2) calculating a point cloud center and a covariance matrix based on the collected point cloud data; (1.3) establishing a laser surface coordinate system on the cross section of the laser surface; and step (1.4), converting all point cloud data from a camera system to a laser coordinate system, and fitting a curvilinear equation.

The invention discloses a microchip single-frequency pulse vortex light laser generating device which comprises a pump light source, an output collimating mirror, a focusing lens, an axicon and a microchip resonant cavity which are sequentially and coaxially arranged. A space light beam or an optical fiber coupling light beam emitted by the pump light source is expanded and collimated by the output collimating lens, then converted by the focusing lens and the axicon and shaped into an annular light beam without orbital angular momentum, the annular light beam is irradiated to the microchip resonant cavity, the microchip resonant cavity is moved in the direction of a light path, and the orbital angular momentum is formed. The positions of the microchip resonant cavity and the focus of the focusing lens are adjusted, transverse mode matching in the resonant cavity is achieved, single-mode intracavity oscillation is generated, and a single-frequency pulse vortex beam is output by controlling the inclination angles of the front surface and the rear surface of the microchip resonant cavity.

The utility model relates to electronic component technical field, and disclose an electronic component packaging positioning device, including support plate and drive assembly, drive assembly sets up at the bottom of support plate, the top of drive assembly is provided with the connecting plate, the top pivoted connection of connecting plate has the guide plate, the utility model discloses through setting up the cylinder can drive connecting seat to remove, makes connecting seat drive connecting plate to rotate, makes connecting plate drive guide seat to remove, makes guide plate drive linkage plate to remove, and then makes linkage plate drive clamping plate to remove to reach the effect of clamping positioning when the electronic component packaging, through setting up the push rod can drive the slide plate to slide, makes the slide plate along the locating plate recess to slide, and then the slide plate drive laser emitter and laser lamp to remove to reach the cleaning path of laser lamp to the electronic component and slide adjustment.

The invention discloses a dual-optical-path coaxial transmit-receive system and a laser radar. The transmit-receive system comprises a laser generation module, a silicon optical chip, a short-focus lens, an optical path turning module, a beam splitter prism and a long-focus lens. The silicon optical chip comprises a transmitting waveguide and a receiving waveguide; the laser generation module generates laser; the short-focus lens, the light path turning module, the beam splitter prism and the long-focus lens are sequentially located on a laser light path, the short-focus lens collimates laser passing through the transmitting waveguide, then the laser enters the light path turning module to be subjected to light path turning, and the laser enters the beam splitter prism; the beam splitter prism reflects the laser to an object to be measured; receiving return laser reflected from the object to be measured; and the long-focus lens focuses the returned laser to the receiving waveguide. According to the above structure, through the arrangement of the short-focus lens and the long-focus lens, laser spots are reduced, the light energy density of the spots is enhanced, the light receiving aperture is enlarged, the light receiving energy is improved, it is guaranteed that the emitted laser spots are within the effective receiving view field of the long-focus lens, and the light receiving efficiency and the distance measuring accuracy are improved.

The application discloses a high-order superposition state LG mode generating device and method, relates to the optical and laser technical field, and comprises a pump light source, a first plano-convex lens, a cone lens, a second plano-convex lens and a laser resonant cavity; the laser resonant cavity is composed of a gain medium, a third plano-convex lens and a plane mirror; the pump light source generates laser, the laser is collimated to the cone lens through the first plano-convex lens, the generated Bessel ring-shaped light beam is focused into the laser gain medium through the second plano-convex lens, the gain medium is excited to generate a ring-shaped vortex light beam, after passing through the third plano-convex lens, part of the laser oscillates in the laser resonant cavity, and the high-order superposition state LG mode is output through the plane mirror, namely the output coupling mirror of the laser resonant cavity. The application provides a simple, convenient, compact, low-precision control demand and high-conversion-efficiency solid vortex light laser (high-order superposition state LG mode generating device) to realize the generation of super-high-order number LG vortex light beams.

The invention discloses an absolute gravimeter based on an optical lattice clock and a working method thereof, and belongs to the technical field of gravity measurement. The absolute gravimeter comprises an optical lattice clock physical device, a lattice light laser, a first polarization beam splitter prism, a first optical reference cavity, a second polarization beam splitter prism, an optical frequency comb, a first acoustic optical modulator, a first linear polarization polarizer, a convex lens, a concave reflector, a clock laser laser, a third polarization beam splitter prism and a second optical reference cavity. And a second acousto-optic modulator and a second linear polarization polarizer. Different from a traditional absolute gravimeter based on laser interference and atom interference, the absolute gravimeter provided by the invention has the advantages that the gravitational acceleration sensed by atoms can be determined by measuring the Watille-Stark sideband spacing in a shallow light lattice and the lattice light wavelength along the gravity direction of the light lattice; the absolute gravimeter has the potential of reducing the measurement error of gravity acceleration to 0.1 mu Gal or even lower, and the precision of the absolute gravimeter is higher than that of a traditional absolute gravimeter by more than one order of magnitude.

The utility model relates to the technical field of road and bridge construction, in particular to a road and bridge measuring device. Comprising a frame body assembly and a measuring assembly, the frame body assembly comprises a main body frame, the measuring assembly comprises a positioning sleeve and a sliding rod, a laser lamp is installed at the end, close to a mounting plate, of the positioning plate, a reflective mirror is installed on the inner side of the mounting plate, a compression spring is connected to the top of the sliding rod, and a supporting frame is connected to the lower end of the sliding rod. A linkage rod is connected to the inner wall of the supporting frame, an in-pipe guide rail is arranged on the inner wall of the positioning sleeve, a stabilizing rod is connected to the outer wall of the sliding rod, and a sliding block ball is connected to the end, away from the sliding rod, of the stabilizing rod. When the rolling wheels encounter the protrusions and the recesses in the advancing process, the rolling wheels generate corresponding acting force on the sliding rod, then the sliding rod exerts acting force on the compression spring and enables the compression spring to be stressed and deformed, and the guide rail in the pipe is used for forming a groove body when the sliding block ball slides.

The invention particularly relates to a method for improving the frequency measurement accuracy of an optical lattice clock in a microgravity environment, which comprises the following steps of: splitting two beams of lattice light through a lattice light laser, respectively splitting two beams of lattice light from each beam of lattice light, and forming two one-dimensional horizontal optical lattices by four beams of lattice light; wherein a certain distance exists between the beam waist positions of the two one-dimensional horizontal optical lattices in the vertical direction, the midpoint position of the two one-dimensional horizontal optical lattices is the position of a magnetic field zero point in the magneto-optical trap, the projections of the axial directions of the two horizontal optical lattices in the vertical plane are parallel to each other, and the projections of the axial directions of the two horizontal optical lattices in the horizontal plane are perpendicular to each other; an acousto-optic modulator with identical parameters is loaded on a light path of each beam of lattice light and is used for linear frequency shift and modulation of lattice light frequency; two beams of clock laser are split by a clock laser light source to respectively excite different atomic groups in two one-dimensional horizontal optical lattices. Differential comparison of transition frequencies of different atomic group clocks is realized by synchronously detecting transition spectrum lines of different atomic group clocks, so that common-mode noise in an optical clock system is suppressed. According to the method, the optical lattice clock with ultra-high frequency measurement precision in a microgravity environment can be realized.

The application provides a road plane intersection point cloud semantic segmentation method, which firstly uses a light laser scanning system to collect point cloud data under multiple points and multiple perspectives; secondly, the point cloud data is registered and spliced to obtain complete point cloud; then, an improved RandLA-Net point cloud semantic segmentation network is constructed by designing a spatial information coding module based on feature similarity, a feature enhancement module based on multi-pooling fusion and a weighted cross-entropy loss function; finally, the improved RandLA-Net point cloud semantic segmentation network is trained, and the trained improved RandLA-Net point cloud semantic segmentation network is used for road plane intersection point cloud segmentation to identify the point cloud category. The method enhances the learning ability of the model to the local features of the point cloud, enriches the spatial features of the input data, and improves the semantic segmentation performance in the road intersection scene.

The invention provides an optical system for reducing optical noise, which is used in the field of laser gas analyzers, and comprises a doublet collimating lens, the doublet collimating lens is arranged on an emission light path of an infrared laser light source, the doublet collimating lens is used for shaping a laser beam emitted by the infrared laser light source, and the doublet collimating lens is used for outputting the shaped laser beam. And the obtained laser collimated light beam is a nearly flat-topped light beam with uniform energy, is freely propagated in the space and is received by a receiving end. According to the invention, a single-piece doublet lens is used as a core optical element, the free light laser beam of TO packaging is shaped to realize laser beam homogenization and collimation, the introduction of intensity noise caused by non-uniform light intensity distribution of the light beam after long-distance light beam transmission is reduced, and the optical interference noise frequency is increased in combination with the long-focal-length light path design, so that the optical interference efficiency is improved. The influence of optical interference noise is reduced through a filtering algorithm. And the structure is compact, the installation and adjustment are simple and convenient, the environmental adaptability is strong, and the application effect of the laser gas analyzer in the gas detection field is realized.

The present application provides a laser annealing device for perovskite photovoltaic samples and a method for using the same. The laser annealing device includes: a visible light laser for laser ranging and laser annealing, a galvanometer for laser beam shaping, an infrared temperature sensor for temperature monitoring, a camera for monitoring the sample, a filter placed in front of the camera for filtering out the laser wavelength, a rack for placing the sample, a guide rail for moving in a horizontal plane, a motor for driving the guide rail, and a control circuit for controlling the movement or operation of components such as the laser, temperature detector, camera, and motor. During the laser annealing process, the temperature and color changes on the surface of the perovskite photovoltaic sample during the laser annealing process are monitored in real time by the temperature sensor and camera, so that the perovskite photovoltaic obtained by the laser annealing device of the present application has a higher photoelectric conversion efficiency than the existing annealing device.

The present invention is a defect evaluation method for a semiconductor Si wafer for evaluating a defect shape inside the Si wafer, the defect evaluation method comprising: a first defect detection step for irradiating a surface of an Si wafer with a DUV laser beam to acquire the position coordinates of defects included in the outermost surface; a second defect detection step for irradiating the surface of the Si wafer with a visible-light laser beam to acquire the position coordinates of defects included in a surface layer region including the outermost surface; a defect classification step for comparing the position coordinates of the defects acquired in the first and second defect detection steps, classifying defects detected only in the first defect detection step and defects of the same coordinates among the defects detected in the first and second defect detection steps into exposed defects, and classifying defects detected only in the second defect detection step into non-exposed defects; and a defect observation step for observing the shapes of the defects classified into the non-exposed defects. Accordingly, a method for observing the overall situations of defects present in an Si wafer without destroying the structures of the defects is provided.

The invention provides laser measurement equipment based on coupler production, and relates to the technical field of measurement equipment, the laser measurement equipment comprises a rack and a mounting rack, the surface of the mounting rack is slidably connected with a moving block, the bottom of the moving block is fixedly connected with a connecting frame, the connecting frame is internally provided with a movable groove, and the movable groove is fixedly connected with the mounting rack. A laser lamp is fixedly connected to the top end of the movable groove, an adjusting mechanism is arranged in the movable groove, a light-transmitting plate is fixedly connected to an end opening of the movable groove, and intelligent matching of the light spot size and the light-transmitting area is achieved through the linkage design of the adjusting mechanism and the light bundling mechanism; the focusing lens is close to the laser lamp to form a large light spot, the light bundling mechanism expands the light transmitting port to improve the scanning efficiency, when small tooth grooves are measured, the focusing lens is far away from the laser lamp to form small light spots, the light bundling mechanism synchronously shrinks the light transmitting port to lock the light spots, vibration offset is avoided, and the measurement accuracy of a complex structure is greatly improved.

The invention discloses a passivation method of a back contact cell, the back contact cell and a photovoltaic module. The passivation method of the back contact battery comprises the steps that ultraviolet laser is adopted for conducting laser treatment on a P area and an N area on the back face of the back contact battery, the power density of the ultraviolet laser acting on the P area is higher than that of the ultraviolet laser acting on the N area, and / or the power density of the ultraviolet laser acting on the N area is lower than that of the P area. The processing time of the ultraviolet laser acting on the P region is longer than the processing time of the ultraviolet laser acting on the N region; and carrying out laser treatment on the back surface of the back contact battery by adopting visible laser. Therefore, the back surface of the back contact battery is subjected to zoning treatment by adopting ultraviolet laser, the hydrogen passivation effect of the N region and the P region can be improved, impurities and defects are reduced, the carrier recombination rate is reduced, and a defect structure caused by excessive hydrogen sources is not easy to generate; compared with ultraviolet laser, the penetration depth of the visible laser is deeper, hydrogen passivation treatment can be performed on the silicon substrate, and the passivation effect of the silicon substrate is improved.