83 results about "Geometrical optics" patented technology

The invention discloses a multi-mode communication and perception channel twinborn AI data set generation method. The method comprises the following steps: establishing a high-precision three-dimensional indoor scene model and an outdoor scene model; configuring parameters of a signal receiving and transmitting end and the RIS, determining dielectric constants and magnetic conductivities of different object surfaces in a scene according to a signal center frequency, and determining reflection, refraction, scattering and diffraction effects of electromagnetic waves in different media based on a geometric optical theory and a geometric diffraction theory; calculating channel parameters of each ray, generating a channel matrix and a channel intensity thermodynamic diagram based on the channel parameters, and generating a complete data set in combination with scene information; and aligning the coordinates of the scene and the ray, loading and rendering ray data and a channel intensity thermodynamic diagram based on a moving path selected by a user, and obtaining a visual file of the multi-modal channel twin AI data set. According to the invention, refined materials and electromagnetic properties are given to objects in a scene, and efficient simulation and second speed visualization of electromagnetic wave propagation are realized.

The invention provides a super lens, a super lens structure parameter determination method, device and equipment, optical imaging equipment, a storage medium and a program product. The super lens comprises a plurality of areas. Any region comprises a plurality of nano fins; wherein at least part of the area is used for focusing incident light with different wavelengths. The super lens is divided into a plurality of areas, and each area can form a super lens for focusing incident light with different wavelengths, so that wavelength division multiplexing is realized, and compared with a conventional geometrical optical lens for realizing wavelength division multiplexing, the super lens disclosed by the invention has the advantages of small volume and high integration level.

The application provides a high-precision autocollimator based on the Tyman Green interference principle and an angle measuring method, aiming at solving the problem that the prior art cannot continue to break through the existing angle measuring precision due to the limitation of geometric optical principle and the influence of environmental factors. The autocollimator comprises a laser, a filtering collimation module, a beam splitter, a reference mirror, a plane mirror, a detector and a data acquisition and processing computer. After the autocollimator is leveled, the plane mirror is placed on a turntable to be measured, and the measurement is carried out when the turntable has no rotation angle and has a rotation angle, so that the laser is emitted to the filtering collimation module to be emitted as monochromatic parallel light to the beam splitter and is divided into two paths. One path is reflected by the plane mirror and then passes through the beam splitter to reach the detector again. The other path is reflected by the reference mirror and then reflected by the beam splitter to reach the detector again. The two beams interfere on the target surface of the detector, the detector records the interference image and uploads it to the computer to calculate the interference fringe offset, so that the angle measurement is completed.

The invention discloses a visible light communication anti-eavesdropping method based on deep reinforcement learning and an optical intelligent reflecting surface, and relates to visible light communication security. Constructing a multi-user safe visible light communication indoor model, and designing a reverse pre-reflection model based on geometrical optical modeling to drive a deep reinforcement learning agent to learn; and accumulating experience by interacting with the environment, sampling and updating the weight of the deep reinforcement learning network by a sampling experience playback pool, and guiding intelligent control on LED beam forming and an optical intelligent reflecting surface. The guide error of the optical intelligent reflecting surface in the environment is perceived by the model at each moment, the secrecy rate of a receiving user is received, the deep reinforcement learning network is combined with the strategy at the previous moment and the environment state to output the strategy at the next moment, and the experience playback pool is circularly updated. And deep reinforcement learning is driven by a reverse pre-reflection model to jointly optimize LED beam forming and optical intelligent reflecting surface guiding, and the optical intelligent reflecting surface is used for accurately controlling a reflection path in a complex dynamic environment, so that the safety communication capability and the resource allocation efficiency are improved.

The disclosure describes a kind of anti-resonant hollow fiber size parameter measurement system and measurement method, the measurement system includes sequentially connected incident light source, light source processing module, fiber to be measured, data acquisition module and data processing module, data processing module is filtered to the spectrum formed by the coherent superposition of multiple scattering light beams, Fourier transform group delay spectrum is obtained, and peak retrieval is carried out to the group delay spectrum, and the group delay difference caused by the coherent superposition of each light beam in group delay spectrum is obtained, and the size parameters of anti-resonant hollow fiber are obtained based on the multi-beam interference geometric optics model and the group delay difference between each light beam. Thus, the simultaneous on-line measurement of multiple parameters of anti-resonant hollow fiber can be realized, and the drawing efficiency and output efficiency of anti-resonant hollow fiber can be further improved, and the fiber manufacturing cost is reduced.

An electronic device includes a backlight module, a light modulating panel, a lens structure and a display panel. The backlight module includes light emitting units. The light modulating panel has pixels. The light modulating panel includes a substrate and a light modulating panel medium layer. The lens structure is disposed on the light modulating panel and includes lenses, wherein at least one lens corresponds to at least two pixels. The display panel is disposed on the lens structure. One of the lenses has a protruding surface, a first geometric optical distance L1 is included between the protruding surface and the light modulating panel medium layer, the one of the lenses has a focal length LF and a field of view at focal point FOV, wherein the first geometric optical distance L1, the focal length LF and the field of view at focal point FOV satisfy:0.5≤L⁢1 / LF≤0.8,and⁢ 45∘≤FOV≤7⁢0∘.

The invention discloses a short-process preparation method of an ultra-high-speed laser cladding coating on the surface of a shaft part and the obtained coating, and the method comprises the following steps: firstly, based on energy conservation and momentum balance, calculating and determining a stable process window of ultra-high-speed laser cladding; based on a geometrical optical model, the horizontal offset distance of the laser head relative to the central axis of the workpiece is calculated and controlled. Based on molten pool stress analysis under a rotating coordinate system, the relation between the rotating direction of a workpiece for restraining flowing of a molten pool and the offset direction of a laser head relative to the central axis of the workpiece is determined, under the determined conditions, ultra-high-speed laser cladding is conducted on the outer circle surface of the shaft part, and single-pass precision grinding is directly conducted after cladding. According to the method, the thin-layer coating with the smooth surface and the uniform thickness is obtained through physical stability control, the machining route of cladding-turning-grinding is simplified into cladding-single-pass precision grinding, and the machining allowance and the production cost are remarkably reduced.

The invention relates to the technical field of computational electromagnetism, in particular to a metasurface scattering behavior analysis method and device, equipment and a storage medium. The method comprises the following steps: tracking an incident wave emitted into the metasurface based on geometrical optics; for the tracked incident wave, determining a first relationship between the equivalent surface current and the scattered field based on physical optics; determining an equivalent surface current based on the generalized boundary condition and a surface polarizability model; and determining a scattering field by combining the equivalent surface current and the first relationship by adopting Gordon integral. According to the metasurface scattering behavior analysis method provided by the embodiment of the invention, the surface polarizability model is combined with physical optics and geometrical optics, so that the scattering behavior related to the metasurface target can be effectively analyzed, and meanwhile, the calculation amount is reduced.

The application provides a chip-level biomolecule detection system, which comprises a biomolecule detection chip and an integrated module; the integrated module comprises a temperature control chip and an information acquisition assembly; the temperature control chip is in heat-conducting contact with the biomolecule detection chip; the information acquisition assembly comprises an optical waveguide chip and an image sensing chip; the optical waveguide chip is covered on the image sensing chip, and a filter layer is arranged between the optical waveguide chip and the image sensing chip. Nucleic acid extraction, purification, enrichment and amplification can be realized through the biomolecule chip; low power consumption and high power density can be realized by using the temperature control chip; the optical waveguide chip does not need to be installed with geometric optical components, and the optical path calibration and maintenance in the later stage are avoided, which is beneficial to multi-channel large-scale parallel detection and can be manufactured on a large scale; the structure is simple, and the application requirements of equipment miniaturization and portability are met through chip-level integration. The application also provides a detection method, which is simple in steps, accurate in temperature control, high in detection efficiency and reliable in results.

The invention provides a zoom type optical signal gain regulator and a circuit, the zoom type optical signal gain regulator comprises a support, the support is provided with a light-emitting part, a convex lens, a photoresistor and an adjusting part, the convex lens is arranged between the light-emitting part and the photoresistor, and the adjusting part is arranged between the light-emitting part and the photoresistor. The light emitting part is used for emitting parallel light to the convex lens and irradiating the parallel light on the photoresistor, the adjusting part is used for adjusting the distance between the photoresistor and the convex lens, and the focus of the convex lens is located between the photoresistor and the convex lens. According to the optical principle of focusing of the convex lens, the distance between the photoresistor and the convex lens is precisely changed through the adjusting piece, so that the light intensity irradiated on the photoresistor is continuously changed, the resistance value of the photoresistor is changed smoothly and is wide in range through the adjusting mode based on geometrical optics, stepless continuous gain adjustment is achieved, and the precision of the light intensity is improved. The adjusting precision is high.

The invention belongs to the technical field of new view angle synthesis, and discloses a generalized method for joint optimization of structured light and a neural radiation field. Superposing a plurality of complex components with independent phases to generate structured light; the sampling factor is applied to the structured light, bicubic interpolation is used for sampling the structured light, and the process is irrelevant to depth information; simulating a light transmission process from the scene to be measured to the stereo camera by adopting geometrical optics; a view angle conversion operation is completed according to the depth image and the shielding image of the camera view angle, the structured light is distorted to a binocular view angle, and an active stereo image is obtained; the active stereo image and the RGB stereo image generate stereo image features and a three-dimensional feature body together through a feature extractor, and a renderer based on a neural radiation field is adopted to perform new view angle synthesis and geometric prediction; the whole process from the structured light to the nerve radiation field can be microprocessed, and joint optimization is carried out.

The application discloses a short-focus projection touch geometric optical adaptive accurate calibration method, relates to the technical field of projection touch calibration, and is used for solving the problems of projection and touch geometric coupling, complicated calibration and long-term overall drift correction, and comprises the following steps: a unified geometric optical model and a layered state vector are established; a factory side establishes a model geometric optical priori, a residual base and a drift mode library based on multiple sample mechanisms; when a terminal is installed, a few-point joint calibration is completed by combining attitude and distance observation and a small amount of user clicks; in a running stage, projection side and touch side drift are identified by using multi-source observation data, and a state vector is updated; based on screen area error, uncertainty and interactive density calculation information value, an interface control layout is adjusted, and an explicit calibration trigger area is adjusted, so that the interactive area can maintain high and stable projection alignment accuracy and touch positioning consistency under different installation conditions and long-term operation.

This disclosure relates to a method and system for underwater calibration of composite polarization states based on an equal focal length refraction model. The method includes: approximating the incident angle of light under small-angle conditions by simultaneously applying geometrical optics imaging equations and Snell's law of refraction, obtaining the transformation relationship between the coordinates of the underwater imaging point and the coordinates of the theoretical imaging point in air, and establishing an equal focal length refraction mathematical model for the underwater camera and projector; designing a composite polarization state encoded sinusoidal projection calibration pattern based on this model; utilizing the polarized light projection characteristics, encoding the horizontally polarized light of the green channel of the calibration pattern into horizontal cosine fringes, and the vertically polarized light of the blue channel into vertical sine fringes; superimposing the cosine and sine fringes to generate two sets of orthogonal polarization state fringe patterns, and performing phase calculation and reprojection error optimization based on the equal focal length refraction mathematical model to achieve parameter calibration. This method can significantly improve the calibration accuracy and efficiency of underwater visual measurements.

The utility model discloses a steam turbine blade surface image acquisition system based on 3D visual path planning, which comprises an industrial robot unit, a product tooling platform unit, a surface data acquisition unit and a geometrical optics unit, and is characterized in that the surface data acquisition unit comprises a 3D sensor and a 2D industrial camera; the geometrical optical unit is formed by combining a plurality of optical light sources and illuminates the blade at different angles and under different illumination conditions, so that details and features of the surface of the blade can be highlighted, and the contrast ratio and definition of an image are improved. The system utilizes 3D visual path planning to guide the data acquisition unit to perform steam turbine blade surface image acquisition, can be widely applied to industrial detection and maintenance, can dynamically adjust the position and the angle of acquisition equipment, and can realize accurate path planning and multi-visual-angle fusion through accurate path planning and multi-visual-angle fusion. And the data acquisition system is guided to realize comprehensive and accurate image acquisition of the blade surface.

This application relates to the field of sensing, detection, and obstacle avoidance technology, and particularly to a multi-line laser module. The module includes a base, optical elements, a first light source, and a second light source. The optical elements are mounted on the base. The first light source is mounted on the base, and its beam, after passing through the optical elements, forms at least one main ray, which is used for forward distance detection. The second light source is mounted on the base, and its beam, after passing through the optical elements, forms at least two auxiliary rays, which are used for lateral distance detection. This application utilizes the first light source in conjunction with a geometric optical lens to form a high-precision main ray, ensuring the accuracy of forward detection. The second light source, in conjunction with a diffraction element, forms multiple auxiliary rays, achieving wide-range lateral detection. The two work together to eliminate blind spots and improve the completeness of environmental perception. The second light source can generate multiple auxiliary rays using a single diffraction element, eliminating the need for independent light sources and lenses for each auxiliary ray, significantly reducing the module size.

The utility model relates to a composite lattice point structure light guide plate with uniform light guide, which comprises a light guide plate body, a light inlet surface, a light outlet surface and a light guide mechanism, and is characterized in that the light guide mechanism is arranged in the light guide plate body and is used for changing an incident line light source into a uniform area light source to be emitted; the light guide plate comprises a light guide plate body, one side face of the light guide plate body is a light inlet face, the back face of the light guide plate body is a light outlet face, the light guide plate further comprises a luminous source mechanism, the luminous source mechanism is used for supplementing light into the light guide plate body, the luminous source mechanism is arranged on one side of the light inlet face, the diameter of hemispherical lattice points ranges from 0.2 mm to 0.5 mm, incident light is subjected to first-time omnidirectional scattering, and the incident light is subjected to second-time omnidirectional scattering. The light directionality is destroyed, the Mie scattering theory is met, spherical protrusions are arranged on the surface, the diameter ranges from 50 micrometers to 200 micrometers, secondary micro-scattering is triggered, a dark area of primary scattering is filled, the mixing effect of Rayleigh scattering and geometrical optics is achieved by controlling the curvature radius of the protrusions, R ranges from 25 micrometers to 100 micrometers, multi-level scattering is formed by the hemispherical base and the spherical protrusions through the composite net points, and the light emitting face is more uniform.

The invention designs a demonstration device for geometric parameter selection of a narrowest wall plane mirror in a shoulder width visible range, and belongs to the crossing field of architectural optics and ergonomics. The demonstration device based on geometric optical model calculation is designed for solving the problems of low space utilization rate and function conflict of space-limited scenes (elevator cars and medical isolation areas) caused by the fact that traditional mirror width design depends on empirical formulas. The device is composed of a plane mirror, a mirror surface supporting table with scales, a left mirror surface limiting plate, a right mirror surface limiting plate, an objective lens distance control square rod, a shoulder width boundary rod, an adjustable eye distance observation disc and the like. A control variable method can be adopted to execute three groups of experiments, namely single-eye independent observation (experiment a), double-eye complementary compensation observation (experiment b) and double-eye common observation (experiment c), and a model with the narrowest mirror width under the three conditions is effectively verified. The device has the beneficial effects of breaking through empirical formula cognition limitation, converting an optical principle into a demonstration device, providing a standardized demonstration process, and realizing dynamic demonstration and parameter calculation of the minimum width of the plane mirror.

The invention provides a light cleaning simulation analysis method and device, electronic equipment and a storage medium, and relates to the technical field of light cleaning. The method comprises the following steps: acquiring a geometric model of the optical cleaning chamber, and setting simulation parameters for the geometric model; adding a geometric optical physical field and a laminar flow physical field into the geometric model; setting material initial conditions for the geometric model; performing ray tracing on the geometrical optical physical field and performing steady-state solution on the laminar flow physical field, and simulating ultraviolet light irradiance and a gas flow field in the light cleaning chamber to obtain a simulation result; and performing simulation analysis on the simulation result to obtain a simulation analysis result. The method aims to solve the problems of low research efficiency and high trial and error cost caused by lack of an effective guidance direction during exploration of gas path and light source layout in the existing light cleaning technology, and realizes improvement of research and exploration efficiency and reduction of exploration cost in experiments.

The utility model discloses a novel geometrical optics exploration device which comprises a shell, a sliding plate is installed on one side of the top of the shell, a fixing clamp is arranged on the sliding plate, a pipe body is connected to the fixing clamp in a clamped mode, and a fixing handle for fixing the position of the fixing clamp is installed on the sliding plate. A limiting groove is formed in the upper surface of the shell, an angle scale is inserted into the limiting groove, and a through groove allowing the pipe body to stretch into the shell conveniently is formed in one side of the limiting groove. Through the device, operations of a fish forking experiment, light reflection and refraction laws and a water flow light guide experiment can be clearly and quickly carried out, and students can more intuitively understand a specific principle, so that the interest of the students is improved.

The application discloses a geometric optical phenomenon restoration method based on a kernel density estimation algorithm, and relates to the technical field of three-dimensional optics, and comprises the following steps: projecting three-dimensional space discrete light ray hitting points to a two-dimensional plane through coordinate conversion; mapping continuous two-dimensional plane coordinates to pixel indexes through affine transformation to obtain a two-dimensional pixel grid; converting discrete points into continuous intensity distribution through a plurality of kernel function diffusion methods; performing nonlinear compression on the kernel function diffusion result through an inverse tangent function to obtain final intensity values; displaying the final intensity values through single-channel to RGB pseudo-color mapping; performing light ray tracing to construct a light ray refraction model; and performing light ray direction to imaging plane coordinate mapping based on the light ray refraction model and the pseudo-color mapping rule to obtain a data set; the smoothness and dynamic range of light ray density distribution are remarkably improved, and high-fidelity visualization of complex refraction phenomena is realized.

The invention discloses a display simulation method and device, electronic equipment, a storage medium and a program product, and relates to the technical field of optical imaging, and the method comprises the steps: constructing a multi-optical-axis display model; acquiring forward initial information of light emitted from any pixel on the display screen; tracking the forward light based on the forward initial information to obtain a forward tracking result of the light; determining reverse initial information of light rays emitted from any pixel on the retina of the simulated eyeball based on the forward tracking result, and performing reverse light ray tracking on the light rays based on the reverse initial information to obtain reverse tracking results of all the light rays; and generating a light field image for a display screen to display based on a reverse tracking result. According to the method, forward ray tracing and reverse ray tracing are sequentially carried out based on the multi-optical-axis display model, geometrical optical path calculation and fluctuation optical characteristic analysis are fused, the light propagation behavior in a complex optical system can be simulated more accurately, and the generation display effect of the light field image is improved.

The invention provides a probe visualization pressure head and a crimping mechanism. The probe visualization pressure head comprises a pressure head body and a light path steering module connected to the pressure head body. A plurality of probes are arranged in the pressure head body, the first ends of the probes are used for being electrically connected with a flexible circuit board, and the second ends of the probes are used for crimping a connector of a panel to be tested; and the light path steering module comprises a geometrical optical element, and the geometrical optical element is used for regulating and controlling an observation light path of an image acquisition device, so that the image acquisition device acquires an image of the second end. According to the application, the light path steering module is additionally arranged on the existing pressure head, and the image of the second end of the probe can be acquired by the existing image acquisition device through the refraction and / or reflection effect of the geometrical optical element of the light path steering module, so that the problem of probe visualization is solved.

The invention discloses a satellite inversion method for the canopy chlorophyll content based on a row-sowing rice geometrical optics-radiation transfer composite model, and the method comprises the steps: 1, simulating the spectral reflectance of rice canopies at an interval of 1 nm in different planting scenes based on agricultural priori knowledge through the row-sowing rice geometrical optics-radiation transfer composite model; 2, mapping the simulated canopy spectral reflectivity data set into a satellite image broadband canopy spectral reflectivity data set by using a spectral response function; step 3, constructing red edge chlorophyll index characteristics based on the simulated broadband reflection spectrum data set; and 4, establishing a hybrid inversion model between the red edge chlorophyll index and the paired canopy chlorophyll content CCC, and carrying out canopy chlorophyll content satellite inversion by using the hybrid inversion model to realize large-range rice chlorophyll content space-time dynamic monitoring. According to the method, the precision of the rice canopy chlorophyll content hybrid inversion model is remarkably improved in the early stage of rice growth.

The invention provides an electronic equipment shell, a surface processing method and a mold. The electronic equipment shell comprises a base material layer and a light trapping layer formed on the surface of the base material layer; the light trapping layer is provided with randomly distributed light trapping structures, and the light trapping structures are at least one of protrusions or recesses and are configured to enable incident light to be reflected and absorbed multiple times through the geometrical optical effect. According to the electronic equipment shell, the surface processing method and the mold disclosed by the invention, the random light trapping structure of the light trapping layer can enable incident light to be reflected and absorbed for multiple times, so that surface reflected light is effectively reduced, the surface of the shell presents a deeper and more uniform black appearance, and the problem of large visual difference between a traditional blind hole and a penetrating hole is solved; the random distribution of the light trapping structures avoids the problem of high brightness or shadow of regular textures at a specific angle, ensures that the surface of the shell can keep consistent low-reflection texture at different illumination and observation angles, does not need to additionally add black film materials, simplifies the process steps, and reduces the production cost.

The invention belongs to the technical field of geometric quantity precision measurement of optical measurement and machine vision, and discloses a deep hole inner surface defect detection method based on endoscopic multiplication imaging. Firstly, deep hole inner wall defects are analyzed to cause change of an endoscopic imaging result. Secondly, a defect characterization model of defect height and angle change on emergent light offset is constructed by analyzing the path change of a single light in combination with a geometrical optical principle and space coordinate system transformation; then, Trace Pro optical simulation software is adopted to simulate height defects and angle defects to verify the accuracy of the model; and finally, through multi-section point cloud splicing, realizing axial three-dimensional reconstruction of different defects on the inner wall of the deep hole, representing an emergent light deformation result caused by different defects, and carrying out reverse analysis according to a light offset result to obtain the inner surface defects of the deep hole.

The invention discloses an outer wall film capable of reflecting sunlight back to the sky, and relates to the technical field of building outer wall energy conservation. The outer wall film is composed of a plurality of arranged reflection units, each reflection unit is provided with a first reflection face and a second reflection face which are perpendicular to each other, and the section defined by the first reflection face, the second reflection face and the building outer wall interface is a right triangle. And adjusting an included angle formed between the first reflecting surface and the building outer wall interface or an included angle formed between the second reflecting surface and the building outer wall interface so as to reflect sunlight with the incident angle larger than alpha back to the sky. According to the outer wall film, the two orthogonal reflecting surfaces of the reflecting unit form a right-angled triangle geometry, and the right-angled triangle geometry and the outer wall surface of a building form a reflecting interface system with a controllable included angle. The energy transfer limitation of traditional single reflection is broken through through the geometrical optics principle, secondary heating of the ground is avoided while heat absorption of the building surface is blocked, and space transfer of solar radiation energy is achieved.

A holographic optical waveguide and a sight, relating to the technical field of optics. A hologram and a holographic waveguide grating are integrated on one element, and optical waveguide transmission characteristics and grating diffraction characteristics are used to achieve an aiming function by means of one optical element, thereby improving the assembly precision of the holographic optical waveguide, reducing the assembly difficulty, and improving the assembly yield. An optical waveguide is added to a conventional hologram, waveguide light transmission characteristics are used to replace conventional geometric optics, and light transmission is implemented by means of refraction and reflection by the optical element, thereby achieving a smaller volume and higher precision. The optical waveguide is provided with an in-coupling waveguide holographic grating and an out-coupling waveguide holographic grating, so that chromatic aberration correction can be performed on a wavelength, and therefore the imaging effect is better than that of conventional monolithic gratings. In addition, a light beam is totally reflected in a substrate and transmitted to the out-coupling waveguide holographic grating, thereby reducing transmission, reducing energy loss, improving the light effect, enabling human eyes to clearly observe reticle information on the hologram, and improving user experience.

The application discloses a method for calculating an average incidence angle of a radome beam, which uses an electromagnetic integral algorithm with high precision to replace a geometric optical method with low precision, and combines threshold screening and weighted average to obtain more accurate parameters of the average incidence angle of the radome beam, so as to provide more accurate design parameters for electric performance design and optimization of the radome.

The invention discloses a diffraction element for generating an annular light source and a design method thereof, and belongs to the technical field of diffraction optics. The design method comprises the following steps: establishing a plane wave and spherical wave incident ray tracing model based on a geometrical optics theory; performing diffraction surface optical path difference and phase distribution calculation according to a ray tracing model; fitting the calculated phase distribution data into a grid phase surface type supported by optical simulation software; light path optimization is carried out in the grid phase surface type obtained through fitting until the annular light spots are converged; micro-nano structure parameters of the diffraction element corresponding to convergence of the annular light spots are calculated, the design of the diffraction element is completed, and the micro-nano structure parameters comprise the etching depth, the diffraction order, the minimum line width and the duty cycle. The problems that a traditional iterative algorithm is large in calculation amount and large in simulation deviation, a traditional axis prism system is large in size and low in efficiency, and an existing diffraction element is difficult in phase singular point fitting are solved, and high-precision and high-efficiency annular light source generation is achieved.

The invention relates to the technical field of wind power operation and maintenance, in particular to a fan tower weld defect detection method and system based on laser radar, and the system comprises a data acquisition module, an anomaly analysis module and a defect identification module. According to the method, a laser radar is used for obtaining geometric-optical double response signals of welding seam space-time alignment; a signal abnormal region is extracted, a reflection saturation distribution index is constructed, and a geometric-reflectivity characteristic vector is generated; identifying the physical attribute of the abnormal region by using the classification model, judging the optical mirror interference as a pseudo defect, and judging the material physical deficiency as a real defect; and performing curved surface fitting repair on the pseudo defects, and performing physical dimension quantification on the real defects. According to the method, the relevance between the light intensity and the depth is excavated, oxide film interference and real defects are effectively distinguished, the problem that the false alarm rate of in-service tower drum detection is high is solved, and non-contact efficient scanning and digital reconstruction are achieved.