66 results about "Laser imaging" patented technology

The application discloses a kind of underwater laser imaging optical systems of entry pupil preposition, whole system is ten lenses, a protective window, a variable diaphragm and a filter, from object side to image side, it is protective window, front group, rear group and filter in proper order;Wherein: protective window is used to isolate water;Front group includes front group first, second, third and fourth lens four lenses in proper order;Rear group includes rear group first, second, third, fourth, fifth and sixth lens six lenses in proper order;Variable diaphragm is located between rear group third and fourth lens, and variable F number is realized by adjusting diaphragm aperture size, and lens depth of field is promoted;Filter is narrowband filter;Object side imaging beam is imaged once after passing through protective window, front group lens, then pass through rear group lens and filter and be imaged on target surface.The application can realize variable F number by variable diaphragm, promote lens depth of field, and focusing is carried out by last three lenses of rear group, and underwater 3m to infinite distance imaging can be realized.

A method is provided for life cycle wear monitoring of a consumable refractory in an electric induction furnace used for heating and melting materials by accumulating laser imaging data of the refractory's inner surface periodically over the refractory's life cycle while the furnace is utilized in a foundry environment and processing the accumulated imaging data for comparative analysis with previous laser imaging data of the refractory's inner surface.

The invention discloses a laser imaging exposure machine, and belongs to the technical field of laser imaging exposure machines, the laser imaging exposure machine comprises a laser imaging exposure machine body, a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are respectively arranged at two ends of the laser imaging exposure machine body, the first fixing plate is provided with a loosening assembly, and the second fixing plate is provided with a clamping assembly. A winding assembly is mounted on the second fixing plate, and the flexible base material is loosened by the loosening assembly, exposed by the laser imaging exposure machine body and stored by the winding assembly; through the design of the arc-shaped plate and the adjusting plate, the tensioning wheel is matched, the curved surface of the flexible base material can be attached in a self-adaptive mode, the curved surface of the flexible base material is cleaned, when the tensioning wheel adjusts the tightness degree of the flexible base material, the adjusting plate can adjust the position so as to be matched with the adjusted curved surface of the flexible base material, and the cleaning effect is better provided.

Disclosed is a system and method for solid-state 2D optical phased arrays (OPAs), which are fabricated from InGaN / AlGaN multiple quantum wells (MQWs) and AlyGa1-yN / AlxGa1-xN (y<x) MQWs. The InGaN / AlGaN MQWs and AlyGa1-yN / AlxGa1-xN (y<x) MQWs include alternating p-type and n-type layers to form p-n-p-n MQW structures to allow the OPA to operate in the reversed biased configuration to further minimize the operating current and heat generation. The phase in each pixel within the OPA will be controlled independently via electro-optic effect in III-nitride MQWs by varying the voltage in each pixel by a Si CMOS array to achieve the manipulation of the distribution of optical power in the far field and steering of the main laser beam. The present disclosure is applicable to a wide range of applications, including the operation of LIDAR systems, laser weapons, laser illuminators, and laser imaging systems.

This invention relates to a real-time monitoring device for yarn vibration characteristics based on laser imaging, comprising: a laser for emitting laser light to form a laser beam; a first polarizing beam splitter for orthogonally decomposing the laser beam into a measurement beam and a reference beam according to the polarization state of the laser; a measurement imaging optical path for measuring the yarn under test using the measurement beam and reflecting the measurement beam passing through the area where the yarn under test is located through a reflector to form an echo beam carrying the characteristic information of the yarn under test; a reference illumination optical path for constructing a uniform and stable background illumination reference beam; a beam splitter for combining the echo beam and the background illumination reference beam to obtain a combined beam; an area array camera for acquiring the combined beam; and an image processing system connected to the area array camera for performing image processing on the acquired combined beam to obtain the vibration characteristics of the yarn. This invention can accurately capture and quantify the vertical vibration characteristics of the yarn.

The invention relates to the technical field of distortion correction, and discloses a laser imaging wavefront distortion correction system and method based on deep learning, and the system comprises a first module which collects three intensity images; the second module is used for estimating the Zernike coefficient and the amplitude of the target complex amplitude; the third module is used for constructing a loss function; a fourth module that calculates an actuator voltage; the fifth module is used for calculating the Stell ratio and the high-frequency lifting ratio in the modulation transfer function; and the sixth module is used for re-applying the voltage of the actuator when judging that the evaluation condition is not met. According to the method, a full-process correction mechanism is constructed by integrating deep learning and an optical physical rule, and initial correction is realized by stably solving the voltage of the actuator by utilizing Tagunov regularization, so that the high-frequency detail definition in imaging is improved, the correction accuracy, real-time performance and robustness are both considered, and the method is suitable for large-scale popularization and application. And the application suitability of the laser imaging technology in the high-precision field is greatly expanded.

The invention discloses a cleaning equipment driving surface covering identification method and device and cleaning equipment. The method comprises the steps that a line laser imaging picture collected by the cleaning equipment in the driving process is acquired; the line laser imaging picture is an image obtained by performing infrared imaging on a line laser projection area; the line laser projection area is an area where the cleaning equipment projects line laser; aiming at each line laser imaging picture, according to line laser infrared imaging information in the line laser imaging picture, carrying out covering object identification to obtain a covering object identification result of a line laser projection area corresponding to the line laser imaging picture; and determining the position of a covering on a driving surface on which the cleaning equipment runs according to the covering identification results corresponding to the plurality of line laser imaging pictures collected by the cleaning equipment. The computing power demand of covering identification can be reduced.

The invention discloses a cleaning equipment driving surface covering identification method and device and cleaning equipment. The method comprises the steps that a line laser imaging picture collected by the cleaning equipment in the driving process is acquired; the line laser imaging picture is an image obtained by performing infrared imaging on a line laser projection area; the line laser projection area is an area where the cleaning equipment projects line laser; aiming at each line laser imaging picture, according to line laser infrared imaging information in the line laser imaging picture, carrying out covering object identification to obtain a covering object identification result of a line laser projection area corresponding to the line laser imaging picture; and determining the position of a covering on a driving surface on which the cleaning equipment runs according to the covering identification results corresponding to the plurality of line laser imaging pictures collected by the cleaning equipment. The computing power demand of covering identification can be reduced.

The application discloses a kind of utilization perception technology obtains the turn-back type dumper unloading system and working method of open car parameter, work in parallel arrangement heavy car line A and empty car line B, the system includes: in heavy car line A according to the direction of car entering respectively arranged OCR system, laser imaging radar device, wheel clamp, heavy car shunting machine, dumper, heavy car line stopper and migration car platform, in empty car line B according to the direction of car, empty car shunting machine, empty car line stopper and empty car line anti-slip device, the system utilizes the perception technology of OCR technology and laser radar scanning imaging technology fusion, obtains the length, width and height etc. Parameters of open car to be turned over and unloaded in advance, to accurately control the operation of single machine equipment, ensure equipment operation stability, improve dumper system operation efficiency.

The invention discloses a regeneration defect detection device and a regeneration defect detection method. The regeneration defect detection device comprises a laser emitting unit, an imaging detection unit and a processing unit, the laser emitting unit is positioned on one side of the first surface of the to-be-detected sample and is used for emitting detection laser to the first surface; the imaging detection unit is positioned on one side of the second surface of the to-be-detected sample and is used for receiving scattered laser scattered by the detection laser based on the regeneration defect of the to-be-detected sample and imaging; the second surface intersects with the first surface; and the processing unit is electrically connected with the imaging detection unit and is used for determining the regeneration defect of the to-be-detected sample according to the laser scattering image of the regeneration defect. By adopting the technical scheme, the regeneration defect of the to-be-detected sample is analyzed through laser scattering imaging, so that the shallow surface regeneration defect of the to-be-detected sample is detected, and the defect depth is determined.

The application discloses a kind of high-speed moving particles and underwater cavity interaction test device in the field of fluid test device, comprising: cavity generation unit, including the cylinder filled with water;Ejection module, is located above cylinder, for making particle high-speed movement pass through the cavity generated by cavity generation unit, and the speed information of particle is realized acquisition;Laser imaging unit is located at the circumferential periphery of cylinder;Control unit, and cavity generation unit, laser imaging unit and ejection module are electrically connected;And a kind of test method;The beneficial effects of the application are: thus by setting cavity generation unit, ejection module, laser imaging unit and control unit, control unit is according to the existence time of cavity, the speed of particle, the accurate pulse control of laser imaging unit to the position of particle, the accurate capture of cavity and high-speed particle interaction image data is realized, and test result is more conducive to the research of abrasion problem.

The invention discloses an alignment device for tinned PCB laser imaging and a use method. The alignment device comprises a workbench, and first alignment plates which are symmetrically arranged are arranged at the positions, corresponding to the long edges, above the workbench; the second alignment plates which are symmetrically arranged are arranged at the positions, corresponding to the short edges, above the workbench. A moving plate is arranged below the second alignment plate, first sliding plates which are symmetrically arranged are connected to the position, corresponding to the moving plate, below the second alignment plate, and a supporting plate is connected to the position, away from the second alignment plate, of one side of the moving plate; the lead screw drives the adjusting plate to move on the outer side of the lead screw in the rotating process, the adjusting plate can drive the first sliding plate and the second alignment plate to move to be close to or away from the middle of the workbench in the moving process, and therefore the PCBs of different proportions can be aligned; consecutive operation can be achieved, and therefore efficiency can be improved.

Embodiments of the present application provide a scanning control method, a control system and related equipment of a laser direct writing device, which are used to improve the precision, efficiency and compatibility of the control program of laser imaging. The method of the embodiments of the present application comprises: acquiring image data of an original grid image, wherein the image data at least comprises position parameters of pixel exposure points in each pixel row; acquiring a scanning strategy selection instruction, wherein the scanning strategy selection instruction indicates a target scanning strategy selected from a plurality of scanning strategies, and each scanning strategy indicates a scanning order of each pixel row; reading the position parameters of the pixel exposure points in each pixel row according to the scanning order in the target scanning strategy, and controlling a laser array to scan a mapping area of each pixel row on a photosensitive coating according to the scanning order in the target scanning strategy, and exposing the positions of the pixel exposure points of each pixel row in the scanning process.

The invention discloses a drill rod joint outdoor positioning method for linear laser-assisted imaging, and belongs to the technical field of iron roughneck equipment on petroleum and geological drilling platforms. Comprising the following steps: acquiring a drill rod image through an imaging system, preprocessing the acquired image, performing template training based on the preprocessed image, extracting a feature template of a laser broken line at a drill rod joint, defining a similarity threshold value, performing feature matching on the image acquired in real time and the feature template, and if the similarity reaches the threshold value, identifying the drill rod joint. And calculating the height coordinate of the central point, and outputting the height coordinate to an iron roughneck control system to guide the clamp body to automatically position and clamp. According to the invention, through the linear laser-assisted imaging and narrow-band filtering technology, outdoor illumination fluctuation and complex background interference are overcome, high-precision automatic identification and positioning of the drill rod joint at a long distance are realized, the automation level, positioning efficiency and safety of iron roughneck operation are greatly improved, and the system has the advantages of low cost and easy integration.

The application discloses a kind of multispectral laser imaging radar systems based on APD array and supercontinuum laser, wavelength covering 450~2400nm supercontinuum laser is used as light source, the continuous laser output is collimated after being collimated by laser collimating system, multi-band fast selection is realized by acousto-optic tunable filter, and uniform emission is completed in combination with variable-focus laser emission optical system;Then, large field of view receiving optical system is constructed, and the echo signal is detected by APD array detector to realize multi-pixel parallel detection, the echo intensity data corresponding to different wavelengths are acquired, and the multispectral reflection information of target is formed.Finally, the laser emission time and APD array receiving time are accurately synchronized, based on time-of-flight ranging principle, the high-precision space-time information of target point cloud data and multispectral information is synchronously acquired.The application realizes the high spectral information acquisition accuracy while breaking through the efficiency and resolution limit of traditional single-point imaging mode.

This application relates to the field of construction machinery technology, and discloses a method for setting the working range of an excavator, a terminal device, and a computer-readable storage medium. The method includes: upon receiving an excavation task, acquiring a working image, dimensions, and boundaries corresponding to the working range of the excavation task; programming the working image, dimensions, and boundaries to generate pattern data corresponding to a programmable pattern card; acquiring the current position and vehicle posture data of the excavator, and controlling a laser imager located on the top of the excavator or pre-set in the working area to project onto the working surface according to the vehicle posture data and the pattern data, displaying the working range corresponding to the excavation task. This solves the problem of inaccuracy in defining the working range of an excavator, achieving the effect of improving the accuracy of delineating the working range of the excavator.

This invention provides a method and system for synthetic aperture three-dimensional laser imaging using a BPSK signal array detector. The method includes: illuminating a moving target with a BPSK laser emission signal to generate a laser echo signal; processing the laser echo signal using a Fourier lens to form a complex laser image signal, which is then acquired by a coherent array detector to generate multiple frames of low-resolution complex laser images; performing synthetic aperture laser imaging and pulse compression processing in the elevation-azimuth and range directions respectively to construct a three-dimensional laser imaging result; and enabling the imaging system to perform multiple repeated observations during target movement, combining spatial sampling signal sparsity reduction, compressed sensing algorithms, and complex dual apodization algorithms to achieve sidelobe suppression of the imaging result. This invention can perform three-dimensional laser imaging on multiple targets passing through the field of view of the imaging system, and has application value in space debris observation and early warning.

This invention discloses an underwater range-gated dynamic imaging method based on metaheuristic attitude estimation, belonging to the field of underwater imaging technology. The method includes: constructing an underwater range-gated laser imaging system; acquiring a continuous, spatiotemporally matched sequence of original scanned images by synchronously controlling laser emission, scanning, and gated exposure; selecting reference frames from the original scanned image sequence and determining the effective imaging region; modeling inter-frame rigid body motion using six-degree-of-freedom pose parameters; constructing a global optimization objective function based on gray-level mean square error; and designing an adaptive weighted pixel loss function, assigning weights to pixels by normalizing gray-level and gradient information to suppress the influence of bright areas. This invention applies metaheuristic optimization ideas to the 6D pose estimation problem of underwater range-gated laser imaging, constructing a 6D pose optimization framework suitable for highly sparse and highly constrained scenarios based on PSO, overcoming the fundamental challenges of feature point scarcity and insufficient datasets.

The invention provides a single-time multi-frame ultrafast laser imaging device and method based on super-continuum spectrum discretization. Laser pulses generated by a laser device are divided into pump light and probe light through a beam splitter; the detection light passes through the sample after being subjected to time broadening through the continuum spectrum generation module to form super-continuum spectrum pulses carrying dynamic processes of the sample at different moments; the super-continuum spectrum pulse enters a continuum spectrum discretization module and is discretized into a plurality of spatially separated and independent spectrum channels; the CCD imaging module simultaneously collects light intensity information of all spatially separated spectrum channels through single exposure to realize ultrafast continuous imaging; therefore, according to the method, the super-continuum spectrum discretization technology is adopted, the time information is coded in the spectrum dimension, the image is directly obtained through optical discretization, the complex calculation and reconstruction process of technologies such as compressed sensing is avoided, artifacts introduced by an algorithm do not exist, the image fidelity is high, and the time resolution can reach the femtosecond magnitude.

The embodiment of the invention discloses a graph printing method and device, computer equipment and a storage medium. Relates to the technical field of batteries. The method is applied to computer equipment and comprises the steps that a target image obtained by conducting laser imaging on a solar cell through a laser detection module is obtained, and the solar cell comprises all datum points; identifying the target image, and acquiring position information of each datum point included in the solar cell; according to the position information of all the datum points, the position of a printing screen is controlled to correspond to the positions of all the datum points, and the printing screen is used for printing a to-be-printed graph; and printing a to-be-printed pattern through the printing screen. According to the scheme, the optical positioning precision based on laser imaging can reach the micron order, the influence of environmental factors is not likely to happen while precise positioning is met, the position of the printing screen is rapidly adjusted to correspond to the position of each datum point, printing is conducted, and the efficiency of conducting pattern printing on the solar cell is improved.

This invention discloses a laser three-dimensional imaging system and method for non-cooperative targets, belonging to the field of laser imaging. The system includes an asynchronous sampling dual-comb ranging subsystem and a scanning subsystem. The asynchronous sampling dual-comb ranging subsystem includes a parallel-arranged measurement optical frequency comb and a sampling optical frequency comb, and a first beam splitter and a reference arm arranged sequentially along the propagation direction of the measurement optical frequency comb, and a second beam splitter and an asynchronous sampling circuit arranged sequentially along the propagation direction of the sampling optical frequency comb. The scanning subsystem includes an electrically connected scanning mechanism, a mechanism controller, and a control circuit. The scanning mechanism is located in the transmission optical path of the first beam splitter, and the control circuit is electrically connected to the asynchronous sampling circuit. This invention enables high-precision three-dimensional imaging scanning.

The application relates to a mounting structure and a precise mounting method of a long-distance laser target tracking and ranging optical path, which are used for high-precision mounting of the laser emission direction of a space target tracking and ranging optical path, the optical path comprising three reflecting mirrors, and the deviation between the laser emission direction reflected by the three reflecting mirrors and the rotation angle of a rotating table during the oscillation of an azimuth axis and a pitch axis is required to be minimized. First, a collimator is used to lead the azimuth axis and the pitch axis to a plane mirror; second, the second reflecting mirror and the first reflecting mirror are mounted and adjusted through the mounting mode of a spacer and a fastening screw, the grinding amount of the spacer is calculated according to the image movement track of the collimator or the laser imaging point movement track in a measuring camera, and the spacer is ground based on the grinding amount, so that the purpose of high-precision mounting is achieved; third, the mounting system of the third reflecting mirror is built through visible light camera zero-point calibration and the measuring camera and an angle reflector, so that the mounting of the third reflecting mirror is realized; and finally, the spacer and the fastening screw are reinforced through epoxy glue, so that the mechanical performance of the optical path is ensured.

A photoacoustic temperature imaging method based on a delay signal dispersion weighting factor belongs to the technical field of photoacoustic / ultrasonic imaging, and comprises the following steps: S1, constructing a dual-bandwidth photoacoustic imaging system based on photoacoustic and ultrasonic dual modes; s2, a pulse laser of the imaging system emits laser, and a central computer of the imaging system preprocesses the ultrasonic modal signals; s3, calculation and linearization processing of an SDDP factor are carried out; s4, weighting of SDDP factors and temperature reconstruction are carried out; and S5, system verification and application. According to the method, by introducing the SDDP weighting factor, weighting calculation is provided for the reconstructed image, and the phenomena of high artifacts and multiple side lobes existing in a traditional image reconstruction algorithm are effectively inhibited. The invention provides a new method for reconstructing a photoacoustic temperature image, which obviously improves the non-intrusive temperature imaging resolution ratio based on the photoacoustic effect and improves the temperature measurement precision. Compared with other non-linear weighting factors, the SDDP factor provided by the invention can reconstruct photoacoustic temperature image information better in real time through linear processing.

This invention belongs to the field of molding technology for laser imaging office equipment components, specifically a method for manufacturing a scraper. The scraper manufacturing method provided by this invention includes the following steps: S1 film molding; S2 removing the film, cleaning it to remove impurities and release agent from the film surface, obtaining a clean film; S3 preparing a coating according to the formula requirements; S4 uniformly applying the coating prepared in step S3 to the working position of the clean film obtained in step S2, obtaining a coated product; S5 drying the coated product obtained in step S4 to obtain a cured product, and cutting or slitting the cured product; S6 pasting the cut or slitting cured product from step S5 onto a metal bracket. The scraper manufacturing method provided by this invention, by coating a functional coating onto the PU film after molding, produces products with high qualification rates, strong versatility, reduced R&D costs, and increased product functionality.

The application provides an ultrasonic imaging system, comprising a probe, an excitation ultrasonic device, a detection ultrasonic device and an imaging device, wherein the probe comprises a transmitting optical fiber and a receiving optical fiber. The excitation ultrasonic device is used for sending first laser to the transmitting optical fiber, the first laser comprises a plurality of pulsed laser beams with different wavelengths; the transmitting optical fiber comprises a grating attached with photoacoustic conversion material, and is used for converting the incident first laser into ultrasonic waves through the photoacoustic conversion material, so as to send ultrasonic wave arrays with different focusing ranges to an object to be detected based on the first laser; the receiving optical fiber is used for receiving ultrasonic echoes obtained after the ultrasonic waves reflected by the object to be detected; the detection ultrasonic device is used for sending second laser to the receiving optical fiber, so that the second laser is reflected into detection laser under the action of the ultrasonic echoes; and the imaging device is connected with the detection ultrasonic device, and is used for processing and imaging the detection laser. The ultrasonic imaging system provided by the application can realize ultrasonic imaging with higher sensitivity and a large angle.

The application discloses a linear array laser imaging target recognition method based on a simulation point cloud dataset, an interactive model of a virtual scanning system and a simulation scene is established, a virtual scanning system motion track is created, a light ray tracing algorithm is used to generate scanning point coordinate data, a virtual scanning system parameter noise model is further established, and noised point cloud data is synthesized; meanwhile, each point in the simulation point cloud data is accurately labeled through the method of establishing a model name-label index table, and finally a simulation point cloud dataset with rich data and accurate labeling is synthesized. Finally, the simulation point cloud dataset is used as training data of a deep learning target recognition algorithm, offline training and online recognition of the algorithm are completed, and accurate laser imaging point cloud target recognition is realized.

The application discloses a kind of laser imaging exposure machine's alignment method, exposure machine includes: exposure platform, front camera and back camera, back camera is installed to exposure platform, exposure platform is suitable for placing substrate, front camera and back camera are located at the opposite sides of substrate respectively, method includes: establishing the mapping relationship between back camera, front camera and exposure platform coordinate system;Substrate is placed in first exposure position and is exposed to first side, and back camera is exposed to the texture image of second side of substrate in exposure position;Substrate is placed in second side exposure position, and the texture image of second side of substrate is collected by front camera;Establish the mapping relationship of the coordinates of second side texture image of substrate collected by back camera and front camera;Second side exposure position is obtained according to the mapping relationship of the coordinates of texture image collected by back camera and texture image collected by front camera.The laser imaging exposure machine's alignment method according to the embodiment of the application has the advantages of accurate alignment, high reliability etc.

To provide a mark emitting device and a moving body capable of measuring a position or an attitude without installing a physical marker.SOLUTION: The measurement system 1 includes a mark emission unit 20 that emits a plurality of laser beams, an imaging unit 30 that images a plurality of marks 101 formed by the laser beams emitted by the mark emission unit 20 and applied to a measurement object, and a calculation unit 50 that calculates a relative positional relationship between the imaging unit 30 and the marks 101 by using images of the imaged plurality of marks 101.SELECTED DRAWING: Figure 1

Disclosed herein is a method and apparatus for rapid depth-scanning in laser imaging. The method comprises masking selected regions of a laser beam incident on a Bessel-beam-forming optical system to generate line foci with controllable depths and lengths. The use of a digital micromirror device (DMD) as the masking device enables rapid (multi kHz rate) modification of the input mask, and thereby rapidly varying the length and axial location of a subsection of typical Bessel beam region in a sample.

A deposition apparatus is described. A deposition apparatus has a substrate support and a laser imaging system disposed to image a portion of a substrate located on the substrate support. The laser imaging system includes a laser source and an imaging unit, and the laser imaging system is coupled to a deposition assembly disposed across a substrate support.