3358 results about "Facula" patented technology

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.

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 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 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 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 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 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 belongs to the technical field of hard and brittle crystal material micropore machining, and particularly relates to an ultra-precision micropore multi-energy field coupling machining method and system.The method comprises the steps that the laser pulse frequency and power are set according to the workpiece material type and the micropore depth-diameter ratio, and a laser focus is positioned at the inner hole bottom of a workpiece; a modified structure extending in the axial direction of a hole is formed by controlling matching of a light spot and a hole diameter and the movement track of the light spot, in the machining process, a plasma nozzle and laser coaxially move, a modified area is removed in real time, a heat affected zone and the hole shape taper are restrained, meanwhile, vibration is applied to a workpiece through an axial ultrasonic vibration device, and machining precision is improved. And chip discharge is promoted, and stress and crack generation are reduced. The problems of serious thermal damage, poor hole shape precision, low machining efficiency and high energy consumption in the micropore machining process in the prior art are solved, and high-quality and high-precision machining of the high-depth-diameter-ratio micropore of the hard and brittle transparent crystal material is achieved.

The invention discloses an automatic optical prism optical axis parallelism adjusting method based on image processing, and relates to the technical field of high-end equipment optical detection. According to the scheme, a prism reflection image sequence is collected based on a calibration light source, an optical axis projection coordinate system is established, light spot geometric centroid and boundary parameters are extracted, and an optical axis direction vector matrix is constructed; calculating an optical axis included angle deviation according to the multi-frame image, and establishing an optical axis parallelism parameter model; decomposing the error distribution matrix through an iterative minimum deviation method to obtain attitude bias and system aberration components, and generating a prism attitude adjustment vector to realize closed-loop automatic adjustment; according to the invention, high-precision and self-adaptive adjustment of the optical axis parallelism can be realized under the conditions of complex illumination and device batch fluctuation, and the stability, consistency and automation level of optical system installation and adjustment are improved.

This invention discloses a 2D gaze point estimation method based on the pupil-corneal reflection vector method. It utilizes the star ray method for pupil center localization and adds a classification pupil detection mechanism for error correction. Corneal feature extraction is performed to obtain the center coordinates of the corneal reflected light spot. Step 4: Establish a gaze mapping model, and assign the detected pupil-corneal reflection vector V(V) to each frame of the image. x V y The gaze coordinates G(G) mapped onto the screen x G y This invention enables 2D gaze point estimation based on the pupil-corneal reflection vector method. Compared with existing technologies, this invention can improve the accuracy of 2D gaze point estimation.

The invention relates to the field of heliostat calibration, and discloses a scheduling method for calibrating heliostats through cooperation of artificial light sources and cameras in a large-scale heliostat field, and the method comprises the following steps: determining the heliostat range covered by each camera, determining the heliostat range covered by each artificial light source, and determining the heliostat range covered by each camera; the method comprises the following steps: determining the center and size of a light spot in an image shot by a camera when the heliostats are calibrated, determining the heliostats which can be calibrated in the coverage range of each artificial light source-camera combination, regarding each effective calibration combination as a node to construct an undirected graph, dividing the nodes into a plurality of groups through a graph grouping algorithm, and ensuring that the nodes in the same group are not connected with each other, therefore, all combinations in the same group can execute calibration in parallel. According to the method disclosed by the invention, the problem of affiliation misjudgment caused by light spot interference between heliostats is solved, possible shadow and shielding problems are avoided, dynamic scheduling of the artificial light source and the camera is realized, and invalid operation time is shortened.

The invention relates to the technical field of laser shaping, in particular to a light spot shaping method and system based on a spatial light modulator, and the method comprises the steps: providing and expanding an incident laser beam in Gaussian distribution, and obtaining a collimated and expanded beam; irradiating an incident laser beam to a spatial light modulator, loading a preset phase modulation pattern to modulate a wavefront phase, and outputting a phase modulation beam; the phase modulation light beam is input into a 4f imaging system, a spatial light modulator is located on the front focal plane of a first lens, and the light beam forms a light field with target intensity distribution on the rear focal plane of a second lens after passing through the system; and the light field is focused on the surface of a workpiece to be processed through an objective lens to form a flat-topped light spot. According to the scheme, uniform light intensity distribution can be flexibly generated without replacing optical elements, the uniformity and utilization efficiency of laser energy in a machining area are remarkably improved, and the problem of material damage or insufficient edge machining caused by too strong center energy is effectively solved.

The invention discloses a height measurement method, a marking method and system, a storage medium and a program product, and relates to the technical field of laser marking, and the method comprises the steps: transmitting first laser through a laser, and projecting a preset first number of first light spots to the surface of a measured object; shooting the first light spot through a monocular camera to obtain a first pixel coordinate of the center of the first light spot in a camera coordinate system; a preset second number of standard scale points on a target laser light path and the height of each standard scale point are determined, the standard scale points are projected to the camera coordinate system, second pixel coordinates of the standard scale points in the camera coordinate system are obtained, and the target laser light path is the light path of the first laser; and calculating the distance between the first pixel coordinate and the second pixel coordinate, determining a target standard scale point with the minimum distance, and taking the height of the target standard scale point as the height of the measured object. According to the invention, the height measurement cost is reduced.

The invention discloses a dynamic multi-spot projection optical system based on an LED light source, which comprises the LED light source, a reflecting cover, a grating sheet, a condensing lens, a concave reflector and an optical reflection assembly, and is characterized in that the LED light source is arranged at the bottom of the reflecting cover, and the grating sheet is provided with a light-transmitting area with a preset pattern shape; the reflecting cover consists of a plurality of plane reflectors A; the concave reflector consists of a plurality of plane reflectors B; light emitted by the LED light source forms a pattern light beam through the grating piece, the light beam is divided and reflected into a plurality of sub light beams through the conical reflecting cover, and the sub light beams are guided to the condensing lens through the optical reflecting mirror set. According to the invention, a low-cost, laser-free and safe LED scheme is adopted, and through innovative optical design, a complex dynamic light and shadow effect comparable to or even surpassing laser projection is realized, and the imaging definition is kept unchanged within a projection distance range of 2-15 meters.

The invention discloses a laser-assisted helium arc penetration fusion welding method, and belongs to the technical field of welding. The problems that according to an existing paraxial laser-electric arc composite structure, the welding track is difficult to control, the energy coupling efficiency is low due to laser energy loss, and weld joint partial melting and undercut defects are caused due to uneven distribution of a welding temperature field due to a generated asymmetric heat source are solved. The welding method comprises the steps of 1, pretreatment; 2, after being focused by a focus lens, the laser is divided into three laser beams through a spectroscope, then the three laser beams are converged again through a plurality of reflectors, three fan-shaped light spots are formed on the surface of the to-be-welded plate after convergence, and finally the focal plane position of the laser is adjusted to be located on the surface of the to-be-welded plate; 3, setting welding current and arc voltage; and fourthly, laser is used for assisting helium arc penetration fusion welding. The method is used for laser-assisted helium arc penetration fusion welding.

The utility model discloses a chip defect multi-face detection device which comprises a detection shell, a display mechanism used for chip multi-face display is installed on the detection shell, a camera is installed in the detection shell, and an adjusting mechanism used for driving the camera to adjust the size of a light spot in the detection shell is further installed on the detection shell. According to the utility model, through the cooperation of the rectangular prism module, the surface light source, the beam splitter prism and the mesopore surface light source, the four rectangular prisms are closed together to form a square chamber, and the chip is placed in the square chamber, so that a camera can detect the front surface and four side surfaces of the chip at the same time; through the arranged adjusting mechanism, the product is small, a telecentric lens needs to be used, and the working distance of the telecentric lens is relatively fixed, so that in order to facilitate focusing, the device is provided with the focusing adjusting mechanism, the position of the telecentric lens can be adjusted through a knob, and a shot picture can be clearly displayed.

The invention provides a signal processing method and system for a long-distance follow-up laser seeker, and belongs to the technical field of signal processing. Target surface center coordinates, a light spot image sequence and a synchronous echo pulse waveform sequence of the seeker are obtained; the speckle energy entropy and the centroid drift distance are obtained by calculating the information entropy and the centroid displacement of the target light spot image, and the pulse width parameter is extracted from the echo waveform. And constructing the three parameters into a laser feature vector, and inputting the laser feature vector into a pre-trained reflecting surface classification model so as to identify the surface material type of a laser irradiation point in real time. And determining a group of optimal follow-up control gain sets from the material gain mapping relation according to the surface material type, and dynamically reconstructing a follow-up control loop by using the optimal follow-up control gain sets. And the sight angle error of the light spot mass center and the target center is calculated, and the adjusted control loop is used for calculating the error to generate an accurate driving instruction signal, so that the tracking stability and the tracking precision of the target are improved.

The invention discloses a vacuum cup welding device which comprises a machine table, a vacuum cup welding device and a welding device. The overall position adjusting mechanism is used for vertically and horizontally adjusting the position; the angle adjusting mechanism is arranged on the overall position adjusting mechanism, adjusts the vertical height and the horizontal position through the overall position adjusting mechanism and is used for adjusting the angle; and the welding mechanism is arranged on the angle adjusting mechanism, the angle of the welding mechanism is adjusted through the angle adjusting mechanism, the angle of the welding mechanism can be adjusted under the condition that the distance is not changed, and the welding mechanism can switch the scanning state and the welding state by adjusting the position of a laser convergent point. The position and angle of the welding mechanism are adjusted through the overall position adjusting mechanism and the angle adjusting mechanism, and the welding mechanism adjusts the position of the lens through the dual effects of air pressure and a supporting spring, so that laser beam convergent points are in two modes, one mode is that the laser beams converge at the welding position to generate high temperature to weld the vacuum cup, and the other mode is that the laser beams converge at the welding position to generate high temperature; and according to the other method, light spots are formed to irradiate the welding position to judge the gap condition, if the gap is larger than the error threshold value, welding is stopped, and if the gap is smaller than the error threshold value, the laser irradiation time during welding is adjusted according to the size of the gap, so that the welding quality is improved.

The invention provides a laser welding method for an unequal-thickness heterogeneous hot-formed steel joint by cooperatively regulating and controlling annular light spots and light beam deflection. The method comprises the following steps: firstly, pretreating, clamping and positioning the PHS1500 and PHS2000 unequal-thickness ultrahigh-strength steel plates; then, the deflection angle of the light beam is adjusted to be within the range of-30 degrees to + 30 degrees; and finally, a galvanometer control system is used for driving a laser beam to conduct swing scanning in a circular track, and welding is completed under the condition that parameters such as laser power, welding speed, swing frequency, the ratio of swing amplitude to core ring energy and the like are set. According to the method, wire filling is not needed, the PHS1500 and PHS2000 butt welding joints can be effectively connected within the light beam deflection angle range of-30 degrees to + 30 degrees, efficient connection can be achieved within the light beam deflection angle range of-20 degrees to + 20 degrees, weld joint forming is effectively improved, weld joint grains are refined, and the problems of stress concentration and welding softening areas caused by different thicknesses and different strengths of plates are solved. And within the light beam deflection angle range of-20 degrees to + 20 degrees, the obtained joint welding seam is well formed, the tensile strength can reach 1400 MPa or above, and the method is suitable for manufacturing the tailor-welded structure of the unequal-thickness plates of the automobile body.

The invention discloses a focusing method of a laser, a focusing control device and laser etching equipment, and the focusing method of the laser comprises the steps: taking a current reference height as a starting point, and determining a plurality of different laser heights of the laser according to a current height adjustment step pitch; at each laser height, a laser device is controlled to form a plurality of light spots through laser etching, and the average diameter of the light spots corresponding to each laser height is determined; determining whether the laser height corresponding to the minimum light spot average diameter meets a preset focusing qualification condition or not; if not, the next reference height and the next height adjustment step pitch are determined according to the size relation of the light spot average diameters corresponding to the multiple different laser heights, and the steps are repeated till the laser height corresponding to the minimum light spot average diameter meets the preset focusing qualification condition. According to the technical scheme provided by the invention, laser focusing is accurately and efficiently completed, and the stability and improvement of the laser etching process quality are ensured.

The invention discloses a high-efficiency low-loss preparation method of a single crystal silicon carbide wafer. The method comprises the following steps: A, grinding the surface of a single crystal silicon carbide ingot; b, the ultrafast pulse laser is modulated into N light spots, the N light spots are focused in the crystal ingot and distributed in the axial direction of the crystal ingot according to preset depth positions, and all the light spots are parallel to the horizontal direction; all the light spots are scanned at the same time, the scanning surface formed by the same light spot covers the cross section of the single crystal silicon carbide crystal ingot in the horizontal direction, and N laser modified layers are formed after scanning; c, carrying out stress-induced separation on the single crystal silicon carbide crystal ingot in the step B; and D, grinding the cutting surface of the single crystal silicon carbide wafer. According to the high-efficiency and low-loss preparation method of the single-crystal silicon carbide wafer, the preparation efficiency of the silicon carbide wafer is improved, meanwhile, the material loss of the single-crystal silicon carbide ingot is reduced, and the yield of the single-crystal silicon carbide ingot is improved.

The invention discloses an optical multi-pass pool modeling and optimizing method, and belongs to the technical field of optical detection. In order to solve the problems that an existing multi-pass cell is too long in length, large in size and inconvenient to carry or transfer, and meanwhile, the mirror surface utilization rate of the multi-pass cell is low, a light path in a multi-pass cell system is accurately modeled by adopting a light ray tracing principle, and the system does not depend on traditional paraxial approximation. The problems that in the prior optical design, due to the fact that equipment is large in size, carrying is inconvenient, and due to the fact that aberration is neglected due to paraxial approximation, large deviation is generated between a calculated value and an actual value are solved. In addition, the light spot distribution is automatically optimized through the genetic algorithm, and the design and debugging time of the optical system is shortened. According to the innovative design strategy, the utilization rate of the reflector is improved, space waste is avoided, the sensitivity and accuracy of a reflection system can be remarkably improved, and further development of the optical multi-pass cell technology is promoted.

The invention discloses a novel photoelectric coding measuring method for a multistage coarse high-precision translation rotating platform. The invention relates to the fields of engineering measurement technology, precision machining and the like, and solves the problem that the measurement precision of an existing photoelectric translation rotary encoder needs to be improved. The camera is fixed on the rotating or translating device, and an encoding device of the encoder is fixed on the immovable rack; an encoding device of the encoder consists of an encoding array and a fine measurement light spot which are uniformly distributed; in the rotation or translation process of the motion device, collecting an encoding array image of an encoder and a precise measurement light spot image through a camera; identifying a coarse precision absolute position measurement value of the rotation angle according to the coding array image; according to the number of displacement pixels in a precise measurement light spot image, a coarse-precision absolute position measurement value is subdivided to the measurement precision which is one of the total number of column pixels of a camera, a high-precision measurement value of a rotation angle or a translation amount is calculated according to a gravity center algorithm, and the photoelectric coding measurement precision can be remarkably improved.

The invention discloses a real-time adjustment camera focusing method and system, and aims to solve the problem of poor anti-interference capability of an existing focusing mode. The method comprises the following steps: off-line construction of an optimization lookup table and on-line real-time focusing: in an off-line stage, constructing a fixed-focus platform, generating an original lookup table through light spot anti-interference preprocessing and centroid calculation, and then constructing an efficient retrieval data structure to obtain the optimization lookup table; in the online stage, images are collected in real time, the center of mass is obtained through anti-interference processing, compensation is conducted through a preset prediction algorithm during shielding, target reference points are matched through an efficient retrieval data structure, and focusing is triggered according to deviation of the center of mass. The system comprises a hardware module and a software module which cooperatively realize the method. The method improves the anti-interference capability of light spot processing and the matching efficiency of the lookup table, adapts to the interference of illumination fluctuation, shielding and the like of an industrial environment, meets the real-time focusing requirements of high-speed production, is compatible with existing hardware, and is convenient to deploy.

The invention relates to the technical field of optical communication equipment testing, in particular to an integrated optical module multi-parameter testing system and method.The method comprises the steps that a multi-channel parallel testing unit synchronously collects light spot morphology, divergence angles, insertion loss and return loss space and transmission characteristic parameters through a transmission light path and a reflection light path; the parameter collaborative analysis module performs nonlinear correlation analysis and dynamic performance threshold evaluation based on a cross-dimension correlation model; the intelligent calibration engine dynamically adjusts the test benchmark and compensation parameters according to the environment temperature and the equipment aging attenuation model; the fault diagnosis and prediction unit identifies potential defect types of the collimator, constructs a performance degradation prediction model in combination with a working state and environmental stress, and predicts a performance evolution trend according to test data; and the test report generation module automatically generates a standardized and customized dual-mode test report, a quality grade label and a performance optimization suggestion according to the prediction result and the diagnosis conclusion. Therefore, the problems of poor test precision, low test efficiency and the like in the prior art are solved.

The invention discloses a method for measuring the thickness of a spectral confocal sensor when optical axes are uneven and a measured material is inclined, and relates to the technical field of displacement or thickness measurement. The method comprises the following steps: calibrating a confocal distance with a relative inclination angle of a standard material by using the standard material with known thickness, establishing a relationship between the thickness of the measured material with the relative inclination angle of the measured material and the thickness of the standard material with the relative inclination angle of the standard material, and establishing a relationship between the relative inclination angle of the standard material and the relative inclination angle of the measured material; and establishing a relationship between the light spot distance and the thickness of the measured material, and finally establishing a thickness measurement model under the conditions that the optical axes of the spectrum confocal sensors are inclined relative to the measured material and the optical axes of the two spectrum confocal sensors are not aligned at the same time. According to the measurement method, models under two conditions are considered at the same time, the measurement method is more suitable for the actual condition, and the measurement precision is improved.