8511 results about "Laser beams" patented technology

A vacuum insulating panel may include: a first substrate; a second substrate; a plurality of spacers provided in a gap between at least the first and second substrates, wherein the gap is at pressure less than atmospheric pressure; a pump-out / evacuation tube extending at least partly into an aperture in one of the substrates; and a pump-out / evacuation tube seal. The pump-out / evacuation tube seal may include at least one of: (a) from about 20-80 wt. % tellurium oxide, the tellurium oxide comprising TeO4 and TeO3, wherein the pump-out tube seal comprises more TeO3 than TeO4 by wt. %; and / or (b) tellurium oxide and from about 10-50 wt. % vanadium oxide, wherein the pump-out tube seal by wt. % comprises more tellurium oxide than vanadium oxide, and wherein the vanadium oxide comprises VO2 and V2O5, and wherein more V in the pump-out tube seal is in a form of VO2 than V2O5. A substantially donut-shaped laser beam may be used to heat pump-out tube material in order to form a pump-out tube seal.

A method of making a vacuum insulating panel, the vacuum insulating panel comprising a first glass substrate, a second glass substrate, a plurality of spacers provided in a gap between at least the first and second glass substrates, and a seal provided between at least the first and second glass substrates, the seal comprising a first seal layer and / or a second seal layer. The method may include laser heating, using a laser beam from a continuous wave near-IR laser, seal material in order to form the first seal layer; wherein the laser heating may include causing the laser beam to move at a lateral speed of from about 5-70 mm / second relative to the substrates and the first seal material so that the laser beam at least partially passes through at least one of the glass substrates and impinges upon at least the second seal layer in order to heat the second seal layer and fire and / or sinter the first seal material thereby forming the first seal layer.

A method of making a vacuum insulating panel, the vacuum insulating panel including a first glass substrate, a second glass substrate, a plurality of spacers provided in a gap between at least the first and second glass substrates, and a seal provided between at least the first and second glass substrates, the seal comprising a first seal layer. The method may include: providing first seal material for the first seal layer in a location at least partially between at least the first and second glass substrates; laser heating, using a laser beam from a continuous wave near-IR laser, the first seal material in order to form the first seal layer; wherein said laser heating may comprise using the laser beam, having a size of from about 2-15 mm, so that the laser beam at least partially passes through at least one of the glass substrates to fire and / or sinter the first seal material thereby forming the first seal layer, in a manner so that the first seal layer a density of from about 2.8-4.0 g / cm3; and after forming the first seal layer, evacuating the gap to a pressure less than atmospheric pressure.

The invention discloses a bed load particle starting test method and device, and relates to the technical field of hydromechanics, the method comprises the following steps: laying sediment particles in a wave water tank, and adjusting the water flow rate through flow control until the bed surface shear stress is less than the critical shear stress; tracer particles are excited to emit fluorescence through a laser beam, and a camera array is used for synchronously collecting instantaneous flow velocity of a flow field and displacement data of sediment particles; analyzing spatial and temporal distribution characteristics of turbulence energy dissipation and pressure energy dissipation based on a turbulence burst process, and establishing a sediment particle starting mathematical model; experimental data and computational fluid mechanics numerical simulation are combined, and the mathematical model is verified and optimized. According to the technical scheme, the analysis precision and the experimental convergence speed of the sediment starting criterion under the complex hydrodynamic force condition can be remarkably improved, and full-chain efficient cooperation from micromechanical response to macroscopic engineering application is achieved.

The invention relates to the technical field of space measurement and calibration, and discloses a laser ranging-fused vision measurement system calibration method, which comprises the following steps of: S1, establishing a system coordinate model of a vision measurement system and a laser range finder, and defining a laser ranging coordinate system, a camera coordinate system and a world coordinate system; s2, calibrating a camera, and obtaining an internal parameter matrix and an external parameter matrix of the camera; s3, acquiring image pixel coordinates of the laser points on the calibration plate; s4, converting the pixel coordinates of the laser points into three-dimensional coordinates under a camera coordinate system based on the internal reference matrix and the external reference matrix of the camera; s5, fitting a direction vector of a laser beam through the three-dimensional space distribution data of the laser points; and S6, based on the laser beam direction vector and the laser ranging value. A direction vector of a laser beam is extracted through principal component analysis, abnormal points are eliminated in combination with a random sampling consistency algorithm, a fitting result is optimized, and the calibration robustness and precision are remarkably improved.

An agricultural treatment system can include a laser light source, a redirection component, an exit component, and safety component(s). The laser light source can emit a laser beam within the system in a first direction. The redirection component can be a mirror that can receive the laser beam and redirect it in a second direction toward an agricultural target object outside the system. The exit component can transition the laser beam from within to outside the system and toward the agricultural target object. Safety component(s) can facilitate maximizing the strength of the laser beam at or proximate the agricultural target object while also reducing the strength of the laser beam at locations away from the agricultural target object. Safety component(s) can include a converging lens and a diverging lens, which can be adjusted to locate a focal point of the laser beam at or proximate the agricultural target object.

The invention discloses a device and method for measuring dust concentration distribution at an inlet of an aero-engine, and belongs to the field of aero-engine sand swallowing tests, the device comprises a pulse laser light source, a shaping module, an optical image acquisition module and a data post-processing module, the pulse laser light source is arranged at a preset position around the aero-engine and is used for emitting laser beams, and the shaping module is used for shaping the laser beams; the aero-engine is located in a sand dust environment to be detected; the shaping module is used for receiving the laser beam and outputting a sheet-shaped beam; the optical image acquisition module is used for receiving coherent scattered light emitted by the grit in the irradiation area of the flaky light beam to form a laser speckle image, and transmitting the obtained laser speckle image to the data post-processing module; and the data post-processing module processes the laser speckle image by adopting an inlet sand dust concentration measurement algorithm to obtain the concentration distribution of the inlet sand dust of the aero-engine. The device is simple in structure, and is suitable for measuring the sand dust concentration distribution at the inlet in the sand swallowing experiments of aero-engines with different sizes or stages.

The invention relates to the technical field of optical particulate matter sensing, in particular to a particulate matter particle size recognition and concentration detection method. The method comprises the following steps: laser emitted by a laser forms a laser beam which is focused and then diverged through a lens; with a laser focus as a reference, at least two photosensitive devices are distributed in the light beam propagation direction and comprise a perifocus device and a far focus device, and receiving surfaces of the near focus device and the far focus device face laser beams to collect scattered light; scattered light signals of each device are collected, and are input into a processing unit after independent current / voltage conversion, signal amplification and analog-to-digital conversion; based on the characteristics that small-particle-size scattered light is preferentially captured by perifocus high irradiance and large-particle-size scattered light is preferentially captured by far focus large beam diameter, a mapping relation between particle sizes and channels is established; the number concentration and mass concentration coefficient of each channel is calibrated through standard particles, and synchronous detection of PM1.0, PM2.5 and PM10 is realized in combination with linear processing, so that the particle size recognition precision and the concentration measurement reliability are effectively improved.

The invention provides a broadband tunable low-phase-noise photo-generated microwave signal source and device, and relates to the technical field of photo-generated microwaves. According to the invention, a low-frequency optical pulse and a high-frequency microwave signal are respectively input into the electro-optical sampling phase-locked loop; and the electro-optical sampling phase-locked loop determines the synchronization error of the optical pulse and the microwave signal based on the phase difference between the optical pulse center point and the microwave signal zero crossing point. And taking the synchronization error as a feedback signal, and continuously adjusting the frequency and the phase of the microwave signal by the voltage-controlled oscillation module until the frequency and the phase are synchronized with the Nth harmonic of the optical pulse. By setting different initial frequencies of the voltage-controlled oscillation module, microwave signals with different integral multiple optical pulse frequencies can be obtained, and broadband tuning of photo-generated microwave signals is realized. Furthermore, the repetition frequency of the frequency comb is locked through beat frequency of two beams of reference laser and two adjacent comb teeth, the stability of the reference laser is transmitted to the optical pulse, and the stability of the reference laser is further transmitted to the microwave signal through synchronization of the optical pulse and the microwave signal, so that the phase noise of the photo-generated microwave signal source is reduced.

A method for ultraviolet-laser transfer and cleaning of microelectronic devices includes transferring a microelectronic device from a donor substrate to a receiver substrate, and cleaning the microelectronic device after transfer. Prior to transfer, the microelectronic device is coupled to the donor substrate via a sacrificial layer containing gallium. A first ultraviolet laser beam ablates the sacrificial layer to release the microelectronic device from the donor substrate, leaving behind a gallium residue on the newly exposed surface of the microelectronic device. A second ultraviolet laser beam ablates the gallium residue to clean the microelectronic device. The first and second ultraviolet laser beams may be generated by the same ultraviolet laser. As compared to liquid etching, laser ablation of the gallium residue eliminates a wet-chemistry step and may be performed by the same laser apparatus used for transfer. Laser cleaning is particularly advantageous when the receiver substrate is intolerant to liquid etching.

The invention discloses a multi-light-spot batch 3D printing device and method, and belongs to the field of 3D printing, the device comprises at least one galvanometer scanning unit, and each galvanometer scanning unit is provided with a laser beam splitting unit; the laser beam splitting unit is used for splitting one laser beam into a plurality of laser beams so as to form a laser matrix, and the distance between adjacent laser beams in the laser matrix is adjusted; the galvanometer scanning unit is used for reflecting the laser matrix to the printing working face, the laser matrix scans on the printing working face by adjusting the reflection angle of the galvanometer scanning unit, and multiple parts are printed in batches. Under the condition that the number of the galvanometers and the number of the lasers are not increased, the printing speed of small parts can be increased, and the requirement for batch production is met.

A flight path clearing system comprising a laser beam system in an aircraft and a controller. The controller is configured to select a number of characteristics for a laser beam based on an object type. The controller is configured to control the laser beam system to emit the laser beam with the number of characteristics in a direction relative to a flight path of the aircraft. The controller is configured to control the laser beam system to move the laser beam with the number of characteristics selected for the object type to scan an area using a pattern that is based on a sequence of locations in the pattern being nearest to a center of the area, wherein a number of objects of the object type hit by the laser beam is cleared from the flight path.

The embodiment of the invention discloses an etching method, an etching device and a solar cell module. The etching method comprises the following steps: controlling a light spot overlapping rate to be smaller than a preset overlapping rate; generating laser with preset performance parameters; shaping the laser into rectangular flat-topped light; and focusing the rectangular flat-topped light into a light spot with a preset size, and etching the perovskite functional layer in the to-be-etched cell according to the light spot overlapping rate. According to the technical scheme provided by the embodiment of the invention, the etching method is set, the perovskite functional layer is etched by adopting point contact, the laser beam adopts rectangular flat-topped light, each pulse independently acts on the film layer, single-pulse etching is performed on the perovskite functional layer in the to-be-etched cell, heat accumulation in an optical pulse overlapping region is avoided, and electrode deposition is more facilitated.

The invention discloses a large-size wafer thinning and polishing device and method based on a dynamic line beam, and the device comprises a dynamic beam generation module, a rotary bearing module and a closed-loop control module, and the dynamic beam generation module comprises a laser, a polaroid, a line beam shaping assembly, a reflector, a hollow conical lens and a lifting module. The linear beam shaping assembly is used for shaping a laser beam into a line-shaped linear beam, the hollow conical lens is a hollow conical lens with an open end face and is used for shaping the line-shaped linear beam into an arc-shaped linear beam, and the hollow conical lens is installed on the lifting module to generate a dynamic arc-shaped linear beam; the rotary bearing module is used for fixing and driving a wafer to rotate; and the closed-loop control module is used for controlling the lifting of the lifting module and the movement of the rotary bearing module. The polishing speed can be greatly increased, the polishing uniformity and the polishing quality are also improved, a plurality of wafers can be thinned and polished at the same time, and the polishing device can adapt to wafers of different sizes and shapes.

The pulverized coal rotational flow stable combustion burner comprises a shell, a primary air pipe, a first swirler, a backflow cap and a laser generator assembly, a secondary air duct is defined between the primary air pipe and an air guide section, the first swirler is arranged in the secondary air duct, the backflow cap is arranged in the secondary air duct, and the laser generator assembly is arranged in the secondary air duct. The backflow cap is arranged in the combustion chamber and located at the outlet end of the primary air pipe. The laser generator assembly is used for emitting sheet-shaped laser beams into the combustion chamber so as to ignite pulverized coal in the combustion chamber. According to the invention, the size and the shape of the laser beam spot are adjusted, and the ignition efficiency and the stability in the pulverized coal combustion process are obviously improved by the aid of a cooling and combustion control strategy in which tertiary air and secondary air are matched; meanwhile, the laser power and mode can be flexibly switched, different coal quality and load working conditions can be adapted, the adaptability and combustion efficiency of the combustor are greatly improved, the service life of a hearth and related parts is prolonged, and the operation cost is reduced.

The invention discloses a laser-assisted mechanical drilling rock breaking system which comprises a drill rod, a cooling channel distributed along the length of the drill rod is arranged in the drill rod, a laser emitting head is arranged at the position, corresponding to the cooling channel, of the top of the drill rod, and a mechanical drill bit is fixedly connected to the lower end of the drill rod. The laser emitting head emits laser beams in the drill rod in the direction towards the mechanical drill bit, a chip removal through hole is formed in the center of the mechanical drill bit, the chip removal through hole and a cooling channel in the drill rod are coaxially arranged, a plurality of laser spraying holes are evenly formed in the mechanical drill bit, and the laser emitting head is connected with a laser generator through a laser transmission pipe. The laser generator is electrically connected with a control terminal through a wire. The problem that in the prior art, single laser rock breaking cannot be coordinated with mechanical rock breaking equipment during rock breaking, so that the rock breaking efficiency is poor or the equipment is overheated is solved. The invention further discloses a rock breaking method of the mechanical drilling rock breaking system based on laser assistance.

The invention discloses a laser coaxial beam combining system for improving the repetition frequency of laser pulses, which comprises p polarization pulse lasers, a pulse time sequence controller and n stages of beam combining devices, each stage of beam combining device comprises an s polarization pulse laser, a polarization beam combiner and an electro-optical Q switch, and n is a non-negative integer and is greater than or equal to 1. The invention has the following advantages: a plurality of beams of laser in different polarization states can be combined, the pulse repetition frequency and the output average power of the laser are improved, the optimal pulse energy and peak power are maintained, and coaxial output of pulses in the same polarization state is realized.

The invention discloses a silicon carbide crystal ingot double-light-spot laser slicing method and device and application of the silicon carbide crystal ingot double-light-spot laser slicing method and device. The silicon carbide crystal ingot double-light-spot laser slicing method comprises the steps that a high-energy laser beam is split into two sub-laser beams, the two sub-laser beams are focused on a selected depth interface in a silicon carbide crystal ingot, and the energy density of light spots formed by focusing of the sub-laser beams is larger than an ablation threshold value of the silicon carbide crystal ingot; two spaced light spots are used for conducting multiple times of scanning machining on the silicon carbide crystal ingot, each time of scanning is conducted in the first direction, multiple times of scanning is conducted in the second direction, so that a modification and crack area is formed on a selected depth interface, the first direction is perpendicular to the second direction, and the second direction is perpendicular to the crystal direction of the silicon carbide crystal ingot; the bonding force of the modification and crack area of the silicon carbide crystal ingot is smaller than that of other areas, and the silicon carbide crystal ingot can be separated from the modification and crack area.

The invention discloses an extensible multi-path beam combination laser assembly and a laser, and relates to the technical field of laser beam combination. The extensible multi-path beam combining laser assembly comprises a half-wave plate, a reflecting element, a polaroid, a Q switch, a controller and 2n basic lasers. The basic laser can output initial pulse laser with the polarization direction being the first direction, every two of the 2n initial pulse laser beams can be combined into 2n-1 pulse laser beams, and every two of the 2n-1 pulse laser beams can be combined into 2n-2 pulse laser beams until the 2n pulse laser beams are combined into one beam of output pulse laser. When the Q switch is turned on, the polarization direction of the pulse laser penetrating through the Q switch can be deflected by 90 degrees. When the pulse laser beams are combined, the first pulse laser beam passes through a Q switch and a reflecting element which are arranged along the light path of the first pulse laser beam, the polarization direction is the first direction or the second direction, and the first pulse laser beam is reflected to a polaroid arranged along the light path of the second pulse laser beam to be combined. Therefore, beam combination of multiple paths of laser is achieved, and even if light path faults exist, the multiple paths of laser after beam combination can be output.

In certain embodiments, ophthalmic laser system includes an auxiliary light system, laser system, imaging system, and computer. The auxiliary light system directs auxiliary light towards a test target according to a planned test pattern to yield one or more actual auxiliary spots of an actual test pattern on the test target. The planned test pattern indicates one or more planned auxiliary spots located relative to a planned laser spot in a predetermined manner. The laser system directs a laser beam to yield an actual laser spot of the actual test pattern on the test target. The imaging system generates a digital image of the actual test pattern. The computer analyzes the digital image to compare the actual to the planned test pattern, detect a deviation of the actual from the planned test pattern, identify an issue indicated by the deviation, and provide output in response to the issue.

The invention relates to a laser communication system autonomous pointing method based on an inter-satellite link. The method comprises the steps that a laser communication system receives link building target satellite instantaneous orbit parameters transmitted by the inter-satellite link; the laser communication system converts the link establishment target satellite instantaneous orbit parameter transmitted by the inter-satellite link into a singular-point-free average orbit element, and the singular-point-free average orbit element serves as a link establishment target satellite orbit initial value of an inter-satellite link source; the laser communication system selects a link establishment target orbit initial value of an inter-satellite link source according to the instruction or the state, and calculates real-time orbit data of a link establishment target satellite; and the laser communication system automatically calculates a laser beam pointing angle according to the attitude and orbit data of the satellite and the real-time orbit data of the link building target satellite. According to the invention, the dependence of maintaining the inter-satellite laser link on the measurement and control conditions of the ground station can be reduced, and the laser beam pointing precision can be effectively improved.

The invention discloses a handheld multi-beam alignment fiber bragg grating sensing device and method. The handheld multi-beam alignment fiber bragg grating sensing device comprises a passive sensing grating assembly, a handheld module and a demodulation control module. The passive sensing grating assembly converts laser propagating in the optical fiber into a spatial light parallel laser beam and concrete an invisible passive end optical axis; the handheld module is used for realizing multi-beam high-speed space scanning and completing laser collimation and projection; and the demodulation control module is used for generating and distributing multiple paths of sensing laser and controlling the galvanometer in the handheld module to move synchronously. Due to the adoption of the hollow circular ring, the invisible virtual optical axis of the passive end can be visualized, an operator can conveniently and roughly recognize the position of the optical axis of the passive end, and the manual alignment efficiency is greatly improved. And meanwhile, one laser beam is divided into four laser beams by adopting a two-stage light beam increasing method, and the four laser beams are scanned through a galvanometer module and an off-axis parabolic mirror to form hundreds of laser beams in time, so that the space coverage is large, and the alignment efficiency is greatly improved.

The invention discloses a laser drilling method and system for a heterogeneous laminated material. The laser drilling method comprises the steps that a first acoustic emission sensor and a second acoustic emission sensor are arranged; in the blind hole forming process, the depth of the blind hole is obtained through a second acoustic emission sensor; determining the laying angle of the carbon fiber prepreg cloth according to the depth of the blind hole, calling a first acoustic emission sensor, and collecting an acoustic emission signal; judging whether the metal layer is exposed or not according to an acoustic emission signal acquired by a first acoustic emission sensor, and if the metal layer is considered to be exposed, acquiring a spectral signal in real time through a laser-induced breakdown spectroscopy detection system; and outputting the laser beam again, and controlling the laser beam to perform layer-by-layer scanning. The position of the metal layer in the blind hole machining process is preliminarily positioned based on the acoustic emission sensor system, then LIBS is used for accurately positioning distribution of the metal layer, laser process parameters are fed back and adjusted, and the spiral track during laser scanning is adjusted, so that the blind hole machining quality is improved.

The invention relates to the technical field of diamond processing, in particular to a diamond laser slicing method and device. The invention relates to a diamond laser slicing method. The method comprises the following steps: 1) utilizing a laser beam from 1t; 100 gt; the surface vertically enters the interior of the single crystal diamond, and a C-C bond is fractured by forming instant local high temperature so as to be carbonized to form graphite; (2) the laser beam is at the distance lt; 100 gt; the surface is at a certain depth and is scanned along the crystal orientation direction of # imgabs0 # or # imgabs1 #, and by controlling the position of a laser focal plane and the energy of the position, only modification points and a graphite layer are formed, or modification points are formed along lt; 111gt, 111gt; the surface-expanded cracks further form a crack expansion layer, and stress difference is generated between the crack expansion layer and the non-modified layer, so that the diamond layer is convenient to peel off. According to the method, arrangement and / or crack propagation of modified points can be accurately controlled, and stress distribution of a modified layer is optimized, so that high-precision diamond slicing is realized, and fragmentation and damage of a sample are avoided.

The invention discloses a light-induced thermoelastic spectrum trace gas detection device and method based on an echo wall mode microcavity. The device comprises a first signal generator, a lock-in amplifier, a laser device control unit, a first laser device, a laser beam collimation unit, a gas chamber, a focusing lens, a tuning fork, an echo wall mode microcavity, a coupling medium, a second laser device, a second signal generator, a photoelectric detector and a computer, the emergent laser is focused to the interdigital root of the tuning fork through the focusing lens; laser output by the second laser device is transmitted by the coupling medium and coupled into the echo wall mode microcavity in an evanescent wave form, the echo wall mode microcavity deforms, the resonant wavelength of the echo wall mode microcavity in the transmitted spectrum moves, and the concentration of the gas to be detected in the gas chamber is inverted according to the displacement of the resonant wavelength. The problems that a quartz tuning fork is large in thermal noise and weak current signals are easily interfered by an electromagnetic field are solved.

Disclosed in the present invention are a dual electro-optic frequency comb-based laser tracking interferometric spatial coordinate measurement system and method. Multiple target mirrors are identified by means of a vision module, to guide a rotating mirror to direct laser light toward each target mirror individually. A laser tracking interferometric ranging module obtains a tracking error of the laser beam deviating from the center of the target mirror to be used for closed-loop tracking control. A light source module outputs single-frequency laser light traceable to a gas absorption peak. By controlling a light source modulation module to enable or disable an electro-optic phase modulation drive signal, dual electro-optic frequency combs or dual-frequency continuous-wave laser light is outputted. In a tracking state, the laser tracking interferometric ranging module respectively uses the two light sources to measure the absolute distance and the relative displacement of a target mirror, and the real-time distance between the target mirror and an original point is computed by means of distance fusion; the elevation angle and the azimuth angle of the target mirror are obtained in real time by means of an azimuth angle and elevation angle measurement module; tracking control and coordinate computation are carried out by means of a tracking control and signal processing module and a computer, and finally three-dimensional spatial coordinates of all the target mirrors are measured.

The invention discloses a nanosecond particle velocity measurement method based on orthogonal line polarization beam splitting, and belongs to the technical field of particle image velocity measurement. The method comprises the following steps: providing two linear polarization state orthogonal double-pulse lasers, and respectively outputting S polarization pulse light beams and P polarization pulse light beams; the four pulse light beams are combined through the double-path laser beam combining mirror set and output to the sheet light mirror set, and a plane illumination jet flow field with the thickness smaller than or equal to 1 mm is formed; scattered light is separated according to a polarization state by using a polarization beam-splitting cubic prism, and particle images under S polarization and P polarization are respectively captured by two double-exposure cameras which are orthogonally arranged; five kinds of time sequence control are triggered through a multi-channel synchronous controller; processing the view field deviation of the two cameras by adopting a block polynomial alignment method; and calculating a particle velocity field based on a particle tracking velocity measurement algorithm. According to the invention, the polarization debugging error is reduced, the homogeneity error after beam combination is obviously reduced, the coincidence degree of the four beams of planar light is improved, and a high-precision universal alignment scheme is provided for the multi-camera PTV technology.

The invention relates to a complex terrain surveying and mapping method, device and equipment and a medium. According to the complex terrain surveying and mapping method, device and equipment and the medium, laser beams with alternating polarization states are synchronously emitted through a dual-wavelength laser radar, an original point cloud with a space-time mark is captured, and earth surface points and noise points are analyzed based on time difference and polarization degradation characteristics; constructing a noise cluster function according to the noise points to identify vegetation artifacts; performing earth surface confidence evaluation on the earth surface points, filtering noise by using an elevation layering strategy, and positioning a fracture area; and finally, based on the denoised cloud layer, the fracture area and the earth surface point confidence coefficient, reconstructing a terrain curved surface, and generating a continuous terrain model. Therefore, precise reconstruction of the terrain sudden change area under vegetation coverage is realized, and the dual technical effects of resisting complex scattering interference and keeping the integrity of the terrain structure are achieved.

The invention discloses a laser beam positioning method based on a deep neural network. The method comprises the following steps: step 1, acquiring a light spot image of a laser beam on a reflector through image acquisition equipment; step 2, a deep neural network DeepLabV3 + model is utilized to perform pixel-by-pixel classification on the light spot image, light spot pixels and non-light-spot pixels are distinguished, a light spot mask is generated, the foreground pixel value of the light spot mask is set to be 1, and the background pixel value of the light spot mask is set to be 0; and step 3, performing morphological processing on the generated light spot mask, and calculating a centroid coordinate of the light spot by using a centroid method. The method has high noise immunity and generalization ability, can accurately and reliably extract the position and area of the light spot, and can give an accurate recognition result under the condition that the laser light spot is abnormal.

A laser system (10) for generating a linear laser marking (34) on a projection surface (33), including a laser beam source (11), which generates a laser beam (25) and emits it along a propagation direction (26), a first beam shaping optical unit (12) embodied as a collimation optical unit and having a first optical axis (13), and a conical mirror (14) which is embodied as a right cone having a cone axis (15) and a reflective lateral surface (22) and is arranged in the beam path of the laser beam downstream of the collimation optical unit (12), wherein the cone axis (15) is oriented parallel to the first optical axis (13). The laser system (10) includes a second beam shaping optical unit (16), which is arranged in the beam path of the laser beam upstream of the conical mirror (14) and reshapes the laser beam into a ring beam (28) having an intensity minimum in the center of the beam.