4303 results about "Facula" patented technology

The invention relates to an aliasing image intelligent deformation small target identification algorithm based on detector multiplexing, and relates to the technical field of aliasing image target identification, and the algorithm comprises the steps: designing a detector multiplexing optical system; designing a view field coding element, and splicing the whole system; simulating and generating a motion track of the early warning target under the space-based background; the target motion trail is imaged through a detector multiplexing optical system; aliasing video simulation of moving target imaging is carried out; an intelligent deformation small target recognition algorithm is applied to the aliasing image, and a moving target is recognized; target resolution and field-of-view positioning are realized by using the relevance between the inter-frame track of the moving target and the light spot shape. According to the aliasing image intelligent deformation small target recognition algorithm based on detector multiplexing, light originally imaged on a large-area-array detector is folded and imaged on a small-area-array detector, and therefore the purpose that the small-area-array detector receives large-view-field imaging is achieved.

The invention discloses a visual combined infrared precast beam appearance defect detection method, and relates to the technical field of civil engineering structure detection and nondestructive testing, and the method comprises the following steps: establishing an illumination time sequence observation layer, collecting multi-dimensional optical parameters aiming at the surface of a precast beam, and generating a dynamic reflection fingerprint baseline; and performing coherent phase decomposition based on the dynamic reflection fingerprint baseline, separating the specular reflection signal from the material texture signal, and calibrating light spot track and intensity evolution data in the unified baseline. According to the method, an illumination time sequence observation layer is constructed to generate reflection fingerprints, coherent phase decomposition and anti-fact playback are combined, reflection interference is stripped, and crack boundaries are recovered; time coordinates are reconstructed through double-mirror-image anchor points, and crack evolution is accurately recovered; phase conjugate projection and light field traction are combined, a dynamic threshold optical fence is established, the exposure rhythm is controlled in a closed-loop mode, and precise detection of the defects of the precast beam is achieved.

A system for three-dimensional spatial perception underwater that includes a primary submersible vehicle. Frontward facing projectors are used to scan beams of light across a selected field of underwater view. Further, event cameras with pixels triggered by events are used to detect corresponding spots of the scanned beams that are reflected from underwater objects or surfaces. Circuitry is configured to determine positions of the objects based on the pixels that are triggered. Additionally, pilot submersible vehicles the projectors and event cameras are tethered to the primary submersible vehicle to provide extend detection of spots corresponding to reflections from underwater objects or surfaces.

The invention relates to a light spot uniformity optimization method and system for a high-precision VCSEL device, and the method comprises the following steps: carrying out the light field collection of a light-emitting surface of the VCSEL device, obtaining the intensity distribution of original light spots, analyzing the non-uniformity of each light-emitting unit, and extracting the non-uniformity characteristics of the light spots. And carrying out deviation cause analysis based on the characteristics, and identifying device structure deviation parameters. According to the method, an etching process is optimized, a corrected oxidized aperture configuration scheme is obtained, near-field light field simulation is carried out by adopting a finite difference time domain method, and optimized light field distribution is verified and predicted. And finally, adaptive compensation design is carried out on the Bragg reflector structure based on a prediction result, light field regulation and control are realized, target light spot uniformity distribution is finally obtained, and the problem that systematic analysis and feedback control on non-uniformity causes of a light emitting unit layer in a device are lacked in the prior art is solved. And local bright spots or dark areas are caused.

The invention relates to a related light measuring device based on a bevel mirror and a control method, and solves the problem that the existing three-dimensional detection technology is insufficient in comprehensive adaptability and cannot meet the requirements of precision detection for stability, precision and data collaboration, and the related light measuring device comprises a laser emission head, a double-bevel mirror, a light path receiving module, a zoom camera and a circuit processing unit. The first bevel mirror is provided with a through hole for laser to directly irradiate a target; the light path receiving module receives and reflects the laser-to-electric signal; the second bevel mirror reflects the target and the light spot light to the camera to obtain visual information; and the circuit processing unit controls all the components, integrates laser and visual information, and realizes three-dimensional detection of the target. The method has the following effects: through the light path collaborative design of the double-bevel mirror, precise and synchronous acquisition of laser ranging signals and visual contour / light spot information is realized, so that high-precision three-dimensional detection of the distance, the flatness and the segment difference of a target object is efficiently completed.

The invention discloses a laser energy threshold millisecond-level dynamic matching method for multi-metal fuse manufacturing, and the method comprises the steps: pre-storing a multi-metal thermophysical parameter model, calibrating a thermal signal in real time through Kalman filtering, and carrying out the online correction of a melting threshold key parameter during the switching of a material; millisecond-level thermal feedback closed-loop control is achieved through the high-frame-rate thermal imaging technology, and the laser power accurately follows the corrected melting threshold value; meanwhile, a three-dimensional imaging and deep learning segmentation algorithm is adopted, geometric information of a welding wire and a molten pool is obtained, the position and the diameter of a light spot are adjusted in real time through an adjustable optical system after the offset is calculated, and millimeter-level space registration closed-loop control is achieved; the two closed-loop systems cooperatively operate according to respective control periods, and precise dynamic matching of laser heat input in a time domain and a space domain is achieved. The problem that the adaptability of a traditional process is insufficient during multi-metal switching and complex geometric change is solved, and the forming quality, the process stability and the efficiency of manufacturing are remarkably improved.

The invention discloses a laser channel atmospheric turbulence fading real-time compensation device and method based on a galvanometer system, and the method comprises the steps: enabling an incident light beam to irradiate a transparent PCB integrated with a photodiode array after the incident light beam is focused through a convex lens, obtaining the light intensity distribution of a current light spot through the photodiode array, and transmitting the light intensity distribution to a signal processing unit; the signal processing unit coarsely adjusts the deviation direction of the light spots according to the received light intensity distribution data, and aligns the part with the strongest light intensity in the light spots to the end face of the optical fiber; and based on the roughly adjusted light spot deviation direction, the signal processing unit dynamically adjusts the deflection angle of the galvanometer by using a gradient descent method according to the power measurement value of the receiving coupling module, so that the fine adjustment of the light spot deviation direction is realized, and the receiving coupling power is maximized. The objective of receiving optical power maximization is achieved, optical design, electronic control and algorithm optimization are combined, and atmospheric turbulence compensation with high cost performance is achieved.

The invention provides a dynamic focusing method and system based on a light spot image and a medium. The method comprises the following steps: focusing to any surface of an object to be measured, and obtaining a calibration image; calculating the center of mass of the focusing surface light spot of the to-be-measured object in the calibration image as a zero point; the method comprises the following steps: processing a light spot image acquired on the surface of a to-be-measured object to acquire a corresponding pixel line-pixel value curve graph; through analyzing peak points and valley points of the pixel line-pixel value curve graph, screening segmentation points of the pixel line-pixel value curve graph, and calculating a corresponding light spot centroid according to the pixel line-pixel value curve graph on the left side and / or the right side of the segmentation points corresponding to the target layer of the object to be measured so as to obtain a defocusing amount; the dynamic focusing is realized by analyzing whether the defocusing amount falls into the control range. The dynamic focusing method provided by the invention is simple and convenient in calculation and convenient for hardware implementation; meanwhile, the invention further provides simplified segmentation point calculation, so that the calculation efficiency is improved; and determining the break point for ensuring the accuracy of dynamic focusing.

The invention relates to the technical field of industrial laser precision measurement, in particular to a laser centering device for a coupler and a using method of the laser centering device for the coupler. Light spot displacement signals and environment vibration signals are synchronously collected through a laser transmitter and an optical sensor array, and a frequency domain feature decoupling module is adopted to separate a shafting displacement component and an interference component; the time domain correlation verification module is used for calculating signal time sequence correlation and generating a deviation vector, and finally the adaptive compensation decision module is used for analyzing the deviation vector and outputting an adjustment instruction. According to the invention, effective separation of real misalignment and transient noise in a dynamic environment is realized, the technical problem of measurement misalignment of an existing laser centering device in a complex industrial environment is solved, and the coupling installation precision and the equipment operation stability are improved.

The invention discloses a lamp and a method for improving the lighting effect of the lamp, the lamp comprises a shell, a light-transmitting piece, a main supporting frame and a light source device, the light source device comprises a mounting substrate and a light emitting body, the mounting substrate is provided with a mounting base surface used for mounting the light emitting body, and the light emitting body is configured to emit light; the position of the light source device is lifted to the mounting base surface to approach to the upper edge of the shell from bottom to top or upwards exceed the upper edge of the shell, so that the upper edge of the shell is prevented from interfering with lateral light rays emitted by the light source device from the light transmitting part; according to the lamp, light rays of a single light source are laterally diffused, the light spots formed by the lamp are larger and are better in uniformity by being matched with avoiding matching of the shell and the light-transmitting piece, so that the lighting effect is improved, and the light sensation of the whole space is better; according to the method for improving the lighting effect of the lamp, the lighting effect is improved by lifting the light-emitting body, so that the mounting base surface of the light-emitting body is upwards close to the upper edge of the shell or upwards exceeds the upper edge of the shell, and lateral light rays can avoid the shell to be spread outwards.

The invention provides a solution concentration real-time detection method based on focusing offset of a compound lens, which comprises the following steps: step A, laser emitted by a laser diode is collimated into parallel light through a plano-convex lens, the parallel light is emitted into a sample cell through a glass window, and then the parallel light is emitted by the compound lens to be imaged on an image sensor; step B, the parallel light is emitted to an image sensor through a compound lens to be imaged into two light spots, the distance # imgabs0 # between the two light spots on the image sensor is recorded, and the solution concentration is inversed through the distance # imgabs1 # between the two light spots; step C, respectively detecting the temperature and the pressure intensity of the solution to be detected through a temperature sensor and a pressure sensor, and compensating the influence of the temperature and the pressure intensity on measurement through an algorithm; on the basis of light spot form analysis of the compound lens, the solution concentration is inversed, the resolution capability of a low-concentration transparent solution is improved, and the detection stability of transparent solutions such as alcohol is improved.

The invention discloses a light spot shaping device based on wave plate polarization conversion and a use method, and relates to the technical field of laser processing, the device divides random polarized light into S / P light through a first polarization beam splitter (PBS), converts the S light into P light through a first 1 / 2 wave plate, modulates the S light through a conventional silicon-based liquid crystal spatial light modulator (LCoS SLM), and converts the P light into the S light through a second 1 / 2 wave plate. And the beams are combined by the second PBS. The method comprises the steps of light splitting, polarization conversion, phase modulation, beam combining, beam expanding and focusing and the like. The double 1 / 2 wave plates are combined with the conventional PBS, the laser energy utilization rate is higher than 85%, commercial SLM equipment is adapted, the machining efficiency of the shaped annular light spots is remarkably improved compared with that of Gaussian beams, the method is suitable for laser welding and metal 3D printing, and the problems of energy waste and high cost are solved.

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 provides an automatic focusing system, an automatic focusing method and a surface defect detection method, and the method comprises the steps: controlling a plurality of light sources in a light source array to be lightened one by one according to a preset time sequence, and enabling a light beam emitted by each light source to be reflected by a corresponding to-be-detected sub-region on the surface of a to-be-detected device, and one part of the reflected light is detected as a defocus detection light spot by the defocus information acquisition unit, and the other part of the reflected light forms a detection image on the main detection camera. As the position of the defocus detection light spot and the position of the microscope objective have a mapping relation, defocus information corresponding to the defocus detection light spot can be obtained through the mapping relation, and therefore automatic focusing of the microscope objective is achieved. According to the lighting sequence of the light source, automatic focusing and imaging are sequentially carried out on each to-be-detected sub-region, so that the image detection precision can be improved, the light path hardware requirement can be reduced, the height information of the surface of the to-be-detected device can be obtained through defocusing information, surface defect detection on an object with complex three-dimensional morphology characteristics is facilitated, and the detection efficiency is improved. And the detection flexibility and precision are improved.

The invention relates to the technical field of chip-scale packaging, in particular to a chip-scale LED device packaging method and system, and the method comprises the steps: collecting bonding point surface topography data, extracting key parameters, calculating a fracture toughness predicted value, generating a bonding pressure dynamic compensation amount when the fracture toughness predicted value is lower than a lower threshold value, and generating a bonding angle composite correction amount when the fracture toughness predicted value exceeds an upper threshold value. And acquiring light intensity distribution data based on the correction amount, generating a dynamic correction amount of lens curvature, calculating a packaging body inclination angle adjustment proportion, and generating a global adaptation amount. By collecting surface morphology data of the bonding point and extracting multiple key parameters, the fracture toughness prediction accuracy is improved, the bonding pressure is dynamically adjusted to strengthen the interface stability, the bonding angle is corrected in combination with morphology feedback, local stress concentration is relieved, the lens curvature is corrected in real time based on light intensity distribution change, and light spot center offset is accurately controlled; the inclination angle parameter is synchronously corrected in combination with the mapping relation between the packaging body inclination angle and the bonding point density, and the packaging optical consistency and the structural integrity are effectively improved.

The invention relates to the technical field of laser processing, in particular to a laser light path rapid switching method and related equipment. The laser light path fast switching method comprises the steps that a single laser emits original laser, the original laser passes through a laser collimator or directly enters a multi-channel reflecting mirror set to adjust a transmission path, a beam expander is selectively started for beam expanding according to the machining requirement, a preliminary shaping light beam is formed, and a basic light path matched with a follow-up optical device is constructed. According to the invention, through the integrated driving mechanism and grating ruler full-closed-loop control rapid switching device, the mobile carrier pre-installed with multiple DOEs is driven to realize accurate cutting-in of a target light spot element in a light path, and the problem of rapid adaptation of multiple light spot patterns in a single laser system is solved.

The invention relates to the technical field of laser transmission characteristic testing, in particular to a medium-wave infrared laser long-distance transmission attenuation characteristic external field testing method and device. The method is an indirect measurement method, a diffuse reflection plate is set up at a designated position of a transmission path, laser reaching the diffuse reflection plate is quantitatively measured through a detector, in combination with a bidirectional reflection distribution function of the diffuse reflection plate, the target reaching power of the laser transmitted through the long-distance atmosphere is obtained, and the target reaching power is calculated by comparing the target reaching power with the laser output power of a transmitting end. The laser long-distance transmission power attenuation characteristic can be obtained, and the problems that in current laser atmospheric transmission attenuation characteristic measurement, a laser radar does not have a medium-wave infrared measurement method, and the power of a specified position of a transmission path cannot be directly received and measured through a detector due to the fact that the size of a light spot is too large after long-distance transmission in direct measurement are solved. The measuring device is simple in structure and can support indirect measurement to obtain the long-distance transmission power attenuation characteristics of the medium-wave infrared laser.

The invention discloses an intelligent laser testing method, which relates to the field of laser testing, and comprises the following steps: judging whether a laser has a fault or not by monitoring the fluctuation amplitude of optical power at the initial stage of starting a to-be-tested laser to emit a light beam; after the laser is not judged to have a fault, the influence of environment heat radiation or aerosol particles on the light beam is positioned by collecting temperature gradient distribution data of a light beam propagation path and combining with air particulate matter concentration data; and obtaining a light beam drift direction, a drift speed and energy uniformity on a light beam propagation path based on the light spot image, determining an abnormal position according to changes of the light beam drift direction, the drift speed and the energy uniformity, and associating the abnormal position with the temperature gradient and the particulate matter concentration in real time. The method effectively distinguishes the fault of the laser from the environmental interference, accurately locates the abnormal position on the beam propagation path, and determines the main environmental interference factors causing the dynamic quality degradation of the beam, thereby providing an accurate basis for the performance evaluation of the laser and the optimization of the application environment.

The invention provides a control method and system of double-station transceiving integrated coupling equipment, and the method comprises the steps: obtaining defect coordinates and pinhole characteristic data of a target region, carrying out the analysis to obtain a transmittance abnormal region, generating an initial path of a spiral search algorithm according to the transmittance abnormal region, adjusting the search step size and angle, and obtaining a preliminary scanning boundary of a to-be-scanned region; analyzing the closeness degree of the scanning path and the defect, if the closeness degree is within a preset range, determining a power reduction condition according to the defect coordinate, adjusting the power, processing the light spot to obtain the size, and calculating a broadening coefficient; and extracting dynamic change data of the light spot size from the distributed power distribution, scanning the defect area to obtain a heat accumulation risk real-time distribution diagram, and dynamically adjusting the light spot size and power until the peak coupling power stability recovers to a preset range.

The invention discloses an off-line adjusting device and method for light spot position offset adjustment, and belongs to the technical field of optical precision adjustment. The device comprises a single-beam light-emitting direction adjusting device, a single-beam light-emitting position adjusting device and a multi-beam angle adjusting device which can be formed on the same off-line platform by configuring different detection units. The method comprises the following steps of: calibrating a light source by using the devices in sequence, and constructing an ideal light source assembly with accurate direction, accurate position and multi-beam parallelism; the whole device is installed to a complete machine system to serve as an absolute reference, and a complete machine optical element is adjusted to make a light spot reach a preset position; and finally, replacing with a customized light source and carrying out fine adjustment by taking the calibrated optical element as a reference. According to the method, decoupling of light source calibration and optical element calibration is achieved through the process of establishing the benchmark offline, transmitting the benchmark through the whole machine and customizing light source adaptation, the installation and adjustment precision, efficiency and repeatability are remarkably improved, and dependence on operation experience is reduced.

The invention provides a cavity adjusting method and device for a laser gyroscope resonant cavity, and the method comprises the following steps: building a light beam loop: horizontally placing a resonant cavity substrate on a supporting seat, and forming the light beam loop with two plane reflectors and two spherical reflectors; light beam introduction: starting a sweep frequency laser assembly, and enabling the reference light beam to enter a resonant cavity light path after passing through a light beam collimation system; light spot form monitoring and coarse adjustment: after a light beam emitted by the resonant cavity is collected by an image collector, the main control computer analyzes the light spot form and judges the imbalance state, evaluation information is fed back to the control system, the control system adjusts the inclination amount of the horizontal dimension and the pitching dimension of the light beam in the light beam collimation system according to the feedback information, and the light spot form is obtained. And the light spot is located at the center of the cavity mirror to finish coarse adjustment of the cavity. According to the method, coarse cavity adjustment can be completed without depending on a complex optical cavity technology, the cavity adjustment time is greatly shortened, the overall operation is simple, and the cavity adjustment efficiency is improved.

The invention discloses a laser automatic focusing method, system and device for a multi-height plane and a medium, and relates to the field of automatic focusing. The method comprises the following steps: acquiring a laser spot image; according to the gray value of each column of pixel points in the laser spot image, dividing continuous pixel columns formed by plane reflection from different heights; based on the width of the to-be-focused plane and the width corresponding relation, determining a continuous pixel column formed by reflection of the to-be-focused plane as a first pixel column; and calculating a first defocusing amount of the to-be-focused plane based on the first pixel column. On the basis of the above processing, in consideration of different pixel values of laser spots reflected by the planes at different heights, continuous pixel columns reflected by the planes at different heights are divided. According to the method, the first pixel column is determined according to the width and the width corresponding relation between the height planes, and then the defocusing amount of the to-be-focused plane is calculated, so that the adverse effect caused by light spots reflected by other height planes is avoided, and the accuracy of automatic focusing is improved.

The invention discloses a vertical shaft construction measuring device, which relates to the technical field of laser measurement and comprises a laser plumb aligner main body, a chassis, a dial, a pointer, a laser plummet, a base and an adjusting knob. When laser measurement is carried out, a laser plummet is turned on firstly, a focused light spot directly irradiates a well bottom mark point, an initial position P1 is recorded, then a plurality of angles are rotated to record P2, P3 and P4, diagonal lines are connected to obtain a reference point, and the instrument is adjusted to enable the light spot to coincide with the reference point to complete calibration so as to measure shaft deformation. Stepped vibration induction is achieved through cooperation of a trigger block and trigger teeth, manual errors are avoided, meanwhile, friction force is increased through cooperation of a resistance block and a sliding rod, fine adjustment is assisted, in addition, through cooperation of a locking rod and a first connecting groove, the angle is locked under the gravity effect, position movement is prevented, and double-hand unlocking is achieved through cooperation of the connecting rod, a first magnetic block and a second magnetic block; safety specifications are compulsively met, and laser measurement accuracy is guaranteed through multiple measures.

The invention belongs to the technical field of image processing, and particularly relates to an aluminum bar quality detection method and system based on machine vision, and the method comprises the steps: obtaining a gray image of the surface of an aluminum bar; constructing a structure tensor for describing the distribution of the pixel points in the local gradient direction, and obtaining gradient coherence indexes of the pixel points according to feature values of the structure tensor; according to the gradient coherence index, the gray value of the pixel point and the gray value mean value and the gray value standard deviation in the neighborhood, obtaining coherence weighted saliency of the pixel point; according to the coherence weighted saliency and the coherence weighted saliency of all the pixel points in the pixel point neighborhood, acquiring a defect probability index of the pixel points; and performing aluminum bar surface quality discrimination according to the defect probability index. According to the method, through combination of gradient coherence and local brightness statistical characteristics, interference of specular reflection light spots on the surface of the aluminum bar and wiredrawing texture noise is effectively inhibited, and accuracy of detection of weak defects such as scratches is improved.

The invention discloses a primary and secondary mirror combined detection system and method for a beam shrinking system, and belongs to the technical field of optical detection.The method comprises the steps that a first micro-spherical mirror and a second micro-spherical mirror are arranged, reflection light spots are captured through an interferometer, the position offset is calculated, and a first control instruction for adjusting the pose of a secondary mirror is generated; a dual-band light source is integrated in a detection light path, wavefront data and alignment monitoring data are collected, and temperature drift is corrected to obtain effective combined wavefront; an error separation model is constructed based on the primary mirror compensator parameter and the Zernike aberration coefficient, and a primary mirror surface shape error component and a secondary mirror offset error component are decoupled and separated by using a preset aberration coupling coefficient; feeding the error component back to a polishing process and a displacement table for closed-loop iterative correction until the RMS value and the PV value of the effective combined wavefront meet a preset imaging quality index; through precise positioning, error correction and decoupling separation, the precision and efficiency of primary and secondary mirror combination detection are improved, and targeted correction is realized.

The invention relates to the technical field of optical measurement and metering equipment, in particular to an on-line precision calibration method for a laser line module in a high-low temperature environment, which comprises the following steps: acquiring horizontal and vertical offsets of a projection light spot of the laser line module, and collecting the temperature of the position of a laser transmitter; respectively calculating a horizontal offset interference degree and a vertical offset interference degree at each acquisition moment, and further obtaining a horizontal interference ratio and a vertical interference ratio; according to the change trend of the horizontal offset interference degree and the vertical offset interference degree within the preset duration before each acquisition moment, the horizontal and vertical interference variation of each acquisition moment is obtained, and then the compensation regulation factors of the horizontal offset and the vertical offset of each acquisition moment are obtained, and the horizontal offset and the vertical offset are compensated. And compensation correction values of the horizontal offset and the vertical offset are obtained, so that the projection precision of the laser line module is calibrated. According to the invention, the precision of projection calibration of the laser line module can be improved.

The invention provides a defect detection system and a defect detection method, the defect detection system comprises an objective table, an illumination channel and a plurality of detection channels, the illumination channel comprises a light source, and the light source is used for providing detection light spots for a detection area of a to-be-detected object. The detection channel comprises an objective lens and a detector, the objective lens is used for collecting scattered light generated by the detection light spot in the detection area, and the detector is used for determining the signal intensity of the scattered light so as to determine defect information of the detection area based on the signal intensity. The incident plane is perpendicular to a second plane where the optical axes of the detection channels are located, deviation angles exist between the optical axes of the detection channels and the normal direction of the surface of the to-be-detected object, and at least two deviation angles in all the deviation angles meet the angle difference condition. According to the device, scattered light of different types of defects can be efficiently collected, concave defects and convex defects can be accurately detected through a plurality of detection channels, missing detection can be avoided, and the two types of defects existing on the surface of an object to be detected can be accurately detected.

The invention provides a rapid calibration method and system for angle measurement precision of a laser seeker. The method comprises the following steps: emitting a laser beam to a calibration rod array through a laser seeker, and collecting the displacement of a laser spot reflected by the surface of each calibration rod through a position sensitive device; inputting the laser spot displacement into a spot displacement feature extraction network, and generating an angle and displacement time sequence containing a timestamp; identifying abnormal sampling points in the angle and displacement time sequence; and performing geometric reconstruction on the abnormal sampling points by adopting a space geometric constraint optimization algorithm and combining a fixed space included angle constraint relation to obtain angle measurement error calibration parameters of the laser seeker. According to the technical scheme provided by the invention, the high-precision dynamic calibration of the angle measurement error of the laser seeker is realized through the collaborative analysis of the space coordinates of the calibration rod and the displacement of the laser spot in combination with the neural network and geometric constraint optimization.

The invention relates to the technical field of laser control, in particular to a light spot consistency control method and system for DFB lasers, and the method comprises the steps: obtaining the current and temperature of each DFB laser at each moment in each control period; calculating the burr saliency, the temperature rise drift coefficient, the temperature drop drift coefficient and the heat source interference value of each DFB laser in each control period; and determining expansion and contraction factors of a positive universe and a negative universe in the fuzzy control algorithm, and controlling the temperature of the DFB laser in real time so as to control the light spot consistency of the DFB laser. According to the method and the device, by selecting the proper telescopic factor and dynamically adjusting the discourse domain range of the fuzzy control algorithm, the response speed of temperature control of the DFB laser is improved, the temperature of the DFB laser is controlled more accurately, and light spot consistency control is realized.

The invention relates to the technical field of image processing, in particular to a defect detection method, system and equipment for an optical protective film, and the method comprises the steps: obtaining each frame of film grayscale image, and extracting a film region in each frame of film grayscale image and all contour edges of the film region; determining a matched contour edge corresponding to each contour edge in the film area of each frame of film grayscale image; determining the relative displacement difference and the motion anomaly of each contour edge in the film area of each frame of film grayscale image; determining the distortion possibility degree of each contour edge in the film area of each frame of film grayscale image; and determining the film bending degree and the defect judgment coefficient of each contour edge in the film area of each frame of film grayscale image, and performing defect detection on the surface of the optical protective film. According to the invention, defects and light spots on the surface of the optical protective film can be distinguished more accurately, and the detection precision of the defects on the surface of the optical protective film is improved.