492 results about "Optical scanning" patented technology

The invention relates to the technical field of 3D printing error compensation and precision control, and particularly discloses a printing comprehensive precision measurement method for 3D printing equipment, which comprises the following steps: designing a standard test piece containing various typical geometrical characteristics, and combining non-contact three-dimensional optical scanning and contact probe measurement means to measure the printing comprehensive precision of the 3D printing equipment. Spatial distribution data of printing errors are obtained in a controlled environment, a three-dimensional error field model with direction and amplitude information is constructed through point cloud registration and feature comparison, and based on error distribution features, the local resolution is dynamically adjusted by adopting a multi-level self-adaptive grid division strategy, so that a three-dimensional error field model with direction and amplitude information is constructed. A local error compensation model is established by combining tightly-supported radial basis function interpolation and a linear fitting method, a boundary consistency matching algorithm is introduced to realize multi-level model fusion, a unified global error compensation field is formed, an error offset vector field is embedded into a slicing process, point-by-point dynamic correction of a nozzle path is realized by using a trilinear interpolation algorithm, and the nozzle path is dynamically corrected. And the forming precision and the surface quality of the key structure are improved.

The invention relates to the technical field of modern precision machining and optical scanning, and discloses a motion control method and system of a laser galvanometer. The method comprises the steps that a real-time position signal is collected and preprocessed, and a filtered position signal is obtained; the deviation between the trajectory model and a preset trajectory model is calculated, when the deviation exceeds a threshold value, the trajectory model is identified as a complex trajectory segment, offset vector data is generated, and an offset compensation demand signal is generated accordingly; driving an instruction device in combination with historical data to obtain compensation parameters; when the deviation is lower than an updating threshold value, updating the trajectory model; a stable control signal is generated based on the optimization model and filtering signal prediction, and the environmental interference is calibrated and the signal smoothness is enhanced through the stable control signal; and finally, comparing the enhanced signal with the optimization model, and repeating the compensation process when the deviation exceeds the standard to obtain a final stable control signal. According to the method, through multi-level deviation processing and iterative optimization, the control precision and the anti-interference performance of the laser galvanometer in complex track movement are improved.

The invention relates to the technical field of oral implantation monitoring, and discloses a monitoring method for analyzing oral implantation health based on using images. The method comprises the following steps: acquiring an optical image data sequence of an oral implanting region by adopting optical scanning equipment, constructing a three-dimensional oral tissue model containing gingival contour features and an implant position, and identifying actual position distribution information of an implant in gingival tissue; and extracting an implant health index set comprising an implant marginal definition value, a surrounding gingival red and swollen area proportion and a gingival atrophy degree value. When any index exceeds a preset health threshold interval, abnormal early warning information is generated, scanning parameters are dynamically adjusted, and images are collected again for iterative monitoring. According to the method, dynamic and accurate monitoring of oral implant health can be realized, health abnormity of the implant can be found in time, and support is provided for long-term health maintenance of the implant.

The invention discloses a frame manufacturing method and a frame, relates to the technical field of frame production, and aims to solve the problem that a welding seam at the splicing position of an existing motorcycle frame is obvious. According to the technical scheme, the method is characterized by comprising the following steps that S1, a metal plate is provided as a raw material, and a frame blank is formed through cutting; s2, the frame blank is placed in a stretching die on a hydraulic machine to be subjected to pressure forming, deformation of the frame blank is controlled through a cavity of the stretching die, and a continuous streamline curved surface is formed on a frame body; and S3, laser cutting is carried out on the frame body based on artificial intelligence. The method comprises the following sub-steps that S3.1, actual three-dimensional point cloud data of the surface of the stretched and formed frame body are obtained through an optical scanning system. According to the method, dense welding seams of traditional multi-section splicing are thoroughly eliminated through the integrated streamline forming technology, intelligent prediction and self-adaptive correction are conducted on material springback and thermal deformation in combination with the AI dynamic compensation cutting technology, and precise adaptation of the frame contour and the motor interface is achieved.

The invention discloses a mining chain wheel repaired based on an intelligent optical tracking technology and a technology. The repairing technology comprises the following steps that S1, an optical scanning device is used for scanning a worn chain wheel, surface point cloud data of the chain wheel are obtained, and an actual three-dimensional model of the chain wheel to be repaired is generated according to the point cloud data; s2, Boolean operation is carried out on the actual three-dimensional model generated in the step S1 and a preset chain wheel standard digital model, so that a relative wear model only representing a chain nest wear area is extracted; s3, based on the relative wear model, automatically generating a robot welding path for filling a wear area, and generating a repair program; and S4, the welding robot is controlled to execute the repairing program generated in the step S3, and self-adaptive surfacing repairing is conducted on the abrasion area of the chain nest. According to the method, through a digital closed loop of accurate scanning, model comparison, automatic programming and robot repairing, accurate repairing of irregular abrasion of each chain nest is achieved, the repairing quality is improved, and the maintenance period is shortened.

The invention discloses an all-optical three-dimensional scanning confocal fluorescent microscopic imaging device and an implementation method thereof. According to the invention, through a deep learning driven adaptive regulation and control method, CNN is adopted to process spatial distribution data and dynamically regulate and control a phase hologram and the light intensity and phase compensation of a laser, so that the focal point of exciting light is subjected to aberration-free axial displacement, a bidirectional parallel optical scanning track of a two-dimensional scanning system is optimized, and all-optical three-dimensional scanning is realized; lSTM and TCN are combined to obtain a time sequence dependency relationship, a laser light source, an adjustable diaphragm, an electric focus-adjustable lens and a photoelectric detector are integrally controlled, efficient synchronization and automatic operation and high-speed axial focusing adjustment are realized, errors and time sequence mismatch are eliminated, optical characteristics of different samples and environmental interference are automatically adapted, and high-quality imaging is kept. The robustness and the applicable scene range of the system are improved; the method is used for model biological embryo real-time tracking, intracellular signal molecule dynamic visualization, cell membrane protein migration and aggregation observation and intracellular organelle interaction tracking.

A three-dimensional optical scanning system for scanning a three-dimensional dental object, the system including a first scanning station configured to receive a first three-dimensional dental object, and further configured to rotate around a first axis during the scanning; and an imaging unit including at least one camera and configured to rotate around an imaging unit axis during the scanning, wherein the optical scanning system is configured such that the imaging unit acquires a plurality of two-dimensional images of the first three-dimensional dental object corresponding to a set of predefined static relative positions between the imaging unit and the first scanning station for generating a first three-dimensional digital representation of the first three-dimensional dental object.

The invention provides an MEMS (Micro Electro Mechanical System) micromirror array chip, a module and optical scanning equipment. The MEMS micromirror array chip comprises a plurality of micromirror structures, a substrate, a vertical lead structure and a capacitance angle sensing structure, according to the micro-mirror array chip integrated with the capacitive sensor, array-level real-time angle detection, feedback control and high-precision scanning angle detection are realized, and the micro-mirror array chip is fast in driving and resistant to interference; meanwhile, the wiring density is reduced by frequency division multiplexing isolation signals; in addition, the application of a monolithic integrated capacitance angle sensor in a high-density micro-mirror array chip is realized by a thick substrate with a silicon through hole; and finally, the micromirror array chip of the monolithic integrated capacitance angle sensor is used for precision optical scanning equipment, a photoelectric angle detector is omitted, optical scanning high-precision real-time angle detection and feedback control, high-precision angle detection and high-speed scanning are realized, the use design is convenient, and the cost is low.

Embodiments of the disclosure include methods and systems for nucleic acid sequencing that may include an objective coupled to an actuator, wherein the actuator is configured to move the objective over a surface of a substrate. In some embodiments, a droplet may be disposed on the surface of the substrate, and the droplet may be moved along with the objective. The distal end of the objective may include a material that provides a higher friction against the droplet than a material of the surface of the substrate. In some embodiments, the distal end of the objective may be immersed in a fluid as it is moved over the surface of the substrate. The substrate may include vertical walls within a region to retain the fluid.

The invention discloses a precise mold micropore size feature measurement method, which comprises the following steps: S1, parameter initialization: reading a mold RFID tag to obtain a nominal hole depth H and a curvature radius R, and calculating an initial interlayer spacing dz0 = 0.1 H; s2, dynamic optical scanning: irradiating the surface of the micropore with a radial polarization annular light source, and detecting polarization angle deviation in real time through a polarization sensor; s3, layered image reconstruction: performing wavelet packet denoising on the image output in S2; s4, three-dimensional measurement: mapping the virtual edge coordinates output in S3 to a three-dimensional space; s5, diameter calculation and verification: calculating a horizontal diameter and a vertical diameter line by line in effective lines in the step S4; and S6, outputting a result. The laser incident angle is regulated and controlled in real time through polarization feedback, closed-loop compensation is performed on reflection distortion in combination with a mold curvature radius parameter, the measurement error of the diameter of a curved surface micropore is reduced from + / -8 microns to + / -1.5 microns, and curved surface self-adaptive accurate detection is achieved.

The invention discloses a PCD laser processing device for temperature and depth detection and a self-adaptive control method thereof, and relates to the technical field of PCD laser processing. The method comprises the following steps: clamping a PCD material workpiece on a processing platform, driving a laser lens to calibrate a focus to the surface of the PCD material workpiece, and starting an optical scanning depth detection device. The spraying head sprays mixed fluid to a laser machining point, the negative pressure air suction device conducts negative pressure absorption and conveys the mixed fluid to the fluid circulation device, and the mixed fluid is conveyed back to the spraying head after being filtered. The laser source outputs laser energy to the PCD material workpiece for machining, meanwhile, the temperature measuring device monitors the temperature of a machining area in real time, and the optical scanning depth detecting device is used for monitoring the depth of a machining trace. And the control center adjusts the fluid jet parameters of the spray head and the output parameters of the laser source according to the received temperature. And the control center adjusts the focus height of the laser lens according to the received depth, so that the laser focus sinks along with the machining point all the time and is kept in a zero focus state.

The invention provides a fire extinguisher tank coating process parameter collaborative optimization control method and system. The method comprises the following steps: acquiring infrared radiation data on the surface of a paint film of a fire extinguisher tank in a curing oven, and generating a temperature distribution matrix through thermal gradient analysis; quantifying temperature difference characteristics of different positions of the surface by using the matrix; a multispectral infrared thermal imager is annularly arranged in the curing oven, the optical scanning path of the multispectral infrared thermal imager is dynamically adjusted based on temperature difference characteristics, temperature abnormal points are marked, and a three-dimensional thermal field distortion atlas is constructed; analyzing temperature abnormal point distribution in the atlas, and generating a local cooling compensation vector; and converting the compensation vector into a heating unit power adjustment instruction by applying a sliding mode control mechanism, and adjusting output power to inhibit paint film deformation. Dynamic balance of the curing temperature of the paint film and temperature range compression are realized, and the deformation defect of the paint film is eliminated.

The invention discloses a light scanning method, which comprises the following steps of: controlling a plurality of deflection partitions in a light deflection module to receive a plurality of incident light beams with different first deflection angles; the deflection angle of each deflection subarea on the incident light beam can be independently adjusted; controlling the currently scanned deflection subarea to deflect a second deflection angle required by the incident light beam; and controlling at least one deflection partition which is not scanned currently to adjust the deflection angle of the deflection partition to the light beam, so that the deflection angle of the deflection partition to the light beam is adjusted after the deflection partition is scanned by the incident light beam in the current deflection period and before the deflection partition is scanned by the incident light beam in the next deflection period. And adjusting the deflection angle of the incident light beam to be a second deflection angle required by the next deflection period. By adjusting the deflection partitions in the non-scanning state in the light deflection module, the waiting time of angle switching adjustment is reduced, and the scanning frame rate is improved.

The invention relates to the technical field of visual inspection, in particular to an LED display screen surface flaw online detection system and method, and the method comprises the steps: carrying out the optical scanning of the surface of a display screen, and capturing an original optical radiation data flow; converting the original optical radiation data stream into a standardized optical data stream based on the acquired ambient light parameter and the target brightness parameter; converting the optical characteristics of each region in the standardized optical data stream into feature vectors; calculating the difference degree between the feature vector and a flawless standard vector, constructing a defect probability graph, and positioning a flaw candidate region; extracting the multispectral optical feature vector and the calibration data vector of the photometric physical property, and fusing to generate a composite feature vector; analyzing the composite feature vectors, determining flaw types and severity levels, and generating a comprehensive flaw analysis report and a control signal for controlling automatic operation of the production line. By analyzing optical signals on the surface of the display screen, high-efficiency, high-precision and high-robustness online detection of surface flaws is realized.

The invention discloses a light scanning method, which comprises the following steps that: a first light deflection device deflects an incident light beam by a plurality of first deflection angles, and projects the deflected light beam to a polarization expanding device; the polarization expanding device amplifies the deflection angle of the deflected light beam in the corresponding deflection direction by a preset multiple, and projects the expanded light beam to the corresponding position of the second light deflection device; and the second light deflection device deflects the expanded light beam at a preset second deflection angle so as to project a scanning light beam. The light deflection angle can be continuously and finely adjusted within a larger angle range, and the structure of the light deflection device is miniaturized.

The invention relates to the technical field of optical scanning, and discloses an afocal optical system for scanning. Comprising an X-direction scanning galvanometer, a front lens group, a rear lens group and a Y-direction scanning galvanometer, the front lens group and the rear lens group are symmetrically arranged about a light convergence surface, the front lens group is located on the light emitting side of the X-direction scanning galvanometer, the rear lens group is located on the light emitting side of the front lens group, and the Y-direction scanning galvanometer is located on the light emitting side of the rear lens group; the front lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along the light propagation direction; the rear lens group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are sequentially arranged along the light propagation direction; wherein the focal length value of the afocal optical system is very large, that is, the focal power approaches to 0, so that after incident circular collimated light passes through the X-direction scanning galvanometer, the front lens group, the rear lens group and the Y-direction scanning galvanometer, the emergent light is still circular collimated light.

The invention relates to the technical field of laser radar wind measurement, and discloses a lightweight coherent wind measurement laser radar system, which comprises a telescope system, a rotary loading main body shell, a scanning servo system, a laser emission module, a signal processing module, an environment monitoring module and a multi-mode communication module. Polarization control strategies are set according to different scanning directions, and the consistency standard of laser echo signal quality is guaranteed; meanwhile, whether the optical transmission distortion phenomenon exists in the scanning process or not can be recognized in real time by monitoring the spectral characteristics of the light source and the offset state of the preset reference in real time, the accuracy of Doppler frequency shift calculation is guaranteed, and the system error of wind field inversion is further reduced; whether an optical scanning axis deviates from a theoretical pointing reference or not is judged in real time by resolving a spatial deviation value of a radar body rotation attitude and a standard scanning track; therefore, the system can avoid the detection omission of the key atmospheric structure.

A mirror device includes a mirror portion, a pair of first support portions, a pair of movable frames, a pair of second support portions, a drive portion having a plurality of piezoelectric actuators, a fixed frame, a pair of connecting portions connecting the drive portion and the fixed frame, and a piezoelectric sensor that generates a signal corresponding to swing of the mirror portion around the first axis or the second axis. The piezoelectric sensor is electrically isolated from the plurality of piezoelectric actuators. The plurality of piezoelectric actuators and the piezoelectric sensor are each formed of an upper electrode, a piezoelectric film, and a lower electrode. The upper electrodes of the plurality of piezoelectric actuators are connected in common via a first metal wire. The lower electrode of the piezoelectric sensor is connected to a second metal wire that is electrically isolated from the first metal wire.

A fundus imaging device has a fixation optical system, an OCT optical system, an imaging optical system, and a controller. The controller is configured to acquire a focus evaluation value based on a slit image formed by slit-shaped illumination light on a two-dimensional imaging element of the imaging optical system in a case where an optical scanner of the imaging optical system deflects in a predetermined direction. The controller is configured to perform diopter correction control of the OCT optical system by driving a first focus adjustment unit of the OCT optical system based on the focus evaluation value.

The invention discloses an optical scanning radiometer in-orbit dark background long time series data extraction method and system, and the method comprises the steps: obtaining cold air observation data and solar zenith angle data from an optical scanning radiometer, and generating a channel-level cold air observation data set and a channel-level solar zenith angle data set. According to the channel-level cold air observation data set and the channel-level solar zenith angle data set, various screening methods are adopted to generate to-be-selected schemes and screening data sets of the to-be-selected schemes. For each to-be-selected scheme, calculating a statistical mean value and data volatility based on a screening data set of the to-be-selected scheme, calculating a dark background representative value of the to-be-selected scheme, and determining a mean value sorting sequence number and a volatility sorting sequence number; and determining an optimal dark background value scheme by adopting a weighted assignment method according to the mean sorting sequence number and the volatility sorting sequence number. Therefore, according to the in-orbit dark background long-time-sequence data extraction method of the optical scanning radiometer, long-time-sequence stable extraction is achieved, and the remote sensing data radiometric calibration precision is remarkably improved.

The modified Bessel beam generating device that achieves design flexibility is provided. The present invention provides a Bessel beam generating device that splits a laser beam emitted from a single light source and causes diverging light in a donut shape from optical fibers arranged on the same circle to be emitted toward the inside, thereby emitting a disk illumination beam that is focused in the vicinity of the center. This makes it possible to generate a disk illumination beam without blocking the high-intensity central portion and without reducing the light intensity.

An ophthalmic apparatus includes an objective lens, an illumination optical system, an optical scanner, a light receiving optical system, and a pupil division member. The illumination optical system includes an illumination diaphragm with one or more openings formed at positions eccentric to an optical axis, and is configured to irradiate slit-shaped illumination light. The optical scanner is configured to deflect the illumination light to guide the deflected illumination light to the eye to be examined via the objective lens. The light receiving optical system is configured to guide returning light, that passes through the objective lens, of the illumination light from the eye to be examined to an image sensor. The pupil division member includes a photographic diaphragm with one or more openings formed at positions eccentric to an optical axis, and is configured to spatially separate optical paths of the illumination optical system and the light receiving optical system.

The invention relates to the technical field of optical detection, in particular to optical detection equipment applied to fastener production and processing, which comprises a gate-type main frame, electric control type turnover frames are hinged to two sides of the inner bottom surface of the gate-type main frame, and electric control type material conveying belts are mounted in the electric control type turnover frames; and optical detection modules are fixedly mounted at the upper ends of the two sides of the gate-type main frame through cross beams. According to the optical detection equipment applied to fastener production and processing, electric control type overturning frames are hinged to the two sides of the inner bottom face of a door type main frame, electric control type conveying belts are installed in the electric control type overturning frames, and optical detection modules are fixedly installed at the upper ends of the two sides of the door type main frame through cross beams; therefore, optical scanning is carried out on the fasteners in the lower conveying process from multiple angles, and the scanning range of the fasteners is widened. And a plurality of built-in cross beams are arranged in the top assembly frame, and the upper ends of the built-in cross beams are provided with electric control type material turning plates, so that the fasteners on the surface can be turned over and adjusted, and the detection range is wider.

To detect malfunctions in optical deflectors with greater precision. [Solution] A device for driving an optical polarizer equipped with a mirror, comprising: a controller for controlling the operation of the mirror; a driver that outputs a first drive signal to the optical polarizer for resonantly driving the mirror on the first axis and a second drive signal for non-resonantly driving the mirror on the second axis based on data output from the controller; and a sensor processing unit for acquiring a sensor signal output from the mirror, wherein the controller determines the phase difference between the first drive signal and the sensor signal, determines that the operation of the optical polarizer is normal if the phase difference with respect to the phase of the second drive signal at the time the phase difference is determined to be within a predetermined range, and determines that the operation of the optical polarizer is abnormal if the phase difference is not within the predetermined range.

Method for imaging at least one beam (1) of electromagnetic radiation onto an object (2), wherein the beam (1) is deflected via its beam path (3) by an optical arrangement (4) by means of an optical scanner system (5) of the optical arrangement (4), comprising at least two optical scanners (6), at least twice with a predetermined and / or predefinable variable angle, each time changing the beam path (3) of the beam (1), and the beam (1) is not subject to refraction between each deflection, the beam (1) is also imaged onto the object (2) by means of an imaging optic (7) after its deflection, and a focus area (8) of the beam (1) is placed on and / or into the object (2) by means of the imaging optic (7).by means of the scanner system (5) at least one pivoting movement of a beam segment (9) of the beam (1) exiting the scanner system (5) is generated and the pivoting movement and / or at least a rotational movement (15) about the pivot point (10) causes a movement of the focus area (8) in at least one spatial direction (X, Y) perpendicular to the optical axis of the imaging optics (7), characterized in that during the pivoting movement the pivot point (10) of the beam segment (9) lies in the beam path (3) in the imaging optics (7) and beam shaping is imposed on the beam (1) via its beam path (3) by means of a beam shaping optic (16) by the optical arrangement (4), so that a focus area (8) extended in the direction of the beam path (3) is imaged on and / or in the object (2), which extends over at least a part of the dimension of the object (2) formed in the direction of the beam path (3).

Embodiments of the present disclosure relate to an optical scanning system, a laser radar and a vehicle. The optical scanning system includes a polarization converter, a polarization beam splitter, a phase delay element, and a scanning element. The polarization converter is configured to receive a first light having a first polarization state and a second light having a second polarization state and emit a third light having the second polarization state. The polarization beam splitter is configured to reflect the third light. The phase delay element is configured to receive the third light and emit a fourth light. The scanning element is configured to receive the fourth light and emit a fifth light. The phase delay element is further configured to convert the fifth light into a scanning light having the first polarization state, and the polarization beam splitter is further configured to transmit the scanning light.

The invention belongs to the field of aero-engine tests, and particularly relates to an aero-engine turbine rear baffle optical scanning measurement tool and a use method. A rotary table fixing plate is arranged on an optical scanning measurement platform; the supporting seat comprises an upper supporting seat and a lower supporting seat, and the upper supporting seat or the lower supporting seat is fixedly mounted on the rotary table fixing plate; the middle supporting plate is circular and is located between the upper supporting seat and the lower supporting seat, and the upper supporting seat, the middle supporting plate and the lower supporting seat are fixedly connected through bolts; a turbine rear baffle to be tested sleeves the outer side of the middle support plate; the multiple clamping rods are evenly arranged in the circumferential direction of the middle supporting plate, each clamping rod comprises a positioning part, an upper clamping part and a lower clamping part, the positioning parts are fixedly connected with the middle supporting plate, the upper clamping parts are fixedly connected with the upper surface of the turbine rear baffle to be detected through upper set screws, and the lower clamping parts are fixedly connected with the lower surface of the turbine rear baffle to be detected through lower set screws. And the lower clamping part is fixedly connected with the lower surface of the turbine rear baffle to be tested through a lower set screw. According to the invention, measurement errors can be reduced, and the measurement efficiency can be improved.

To provide an optical scanning device that can accurately adjust lens distortion with a simple configuration. [Solution] The optical scanning device comprises an fθ lens for focusing light onto an object to be irradiated, a housing section having an opening for housing the fθ lens, a cover section that closes the opening of the housing section and allows light emitted from the fθ lens to pass through, and an adjustment section that adjusts the amount of rotation of the fθ lens around a pivot axis extending along the thickness direction of the fθ lens. The adjustment section includes a head protruding outward from the side wall of the housing section and a screw section extending from the head along a first direction toward the fθ lens through the side wall, and has a male screw member that rotates the fθ lens by moving the tip of the screw section along the first direction in response to the rotation of the head. The cover section protrudes so as to abut against the outer circumference of the head and has an arm section that generates a click sensation in the head in response to the rotation of the head.

The invention provides a high-flux large-volume optical tomography system and method, and the system comprises a spatial light modulator which is used for carrying out the wavefront modulation of an incident laser beam, and generating an illumination light beam; a scanning device for generating an illumination light sheet based on the illumination beam; the sCMOS camera is used for detecting signals; the sample table is used for bearing and driving a sample to move; the synchronous control module is configured to control the spatial light modulator to dynamically load a composite phase pattern, and the composite phase pattern is formed by superposition of a depth-of-field phase component used for generating an extended depth-of-field light beam, a blazed grating phase component used for concentrating energy to first-level light and a lens phase component used for controlling a light beam focus to perform axial scanning; the synchronous control module is further configured to synchronously control the refreshing of the composite phase pattern and the deflection angle of the scanning device so as to acquire a three-dimensional image view field block through pure optical scanning during the stationary period of the sample stage. According to the invention, the imaging flux is greatly improved.