121 results about "Optical calibration" patented technology

The invention relates to the technical field of map data acquisition, in particular to a surveying and mapping geographic information map data acquisition method and system, and the method comprises the steps: building a space-time reference network: generating an underground-earth surface space-time reference network for connecting the underground with the earth surface through acousto-optic joint calibration; generating a multi-source correction parameter: fusing the underground inertial navigation data, the surface atmospheric refraction parameter and the equipment temperature drift coefficient, and calculating a multi-source correction parameter set for coordinate system conversion and error compensation; space-time evolution element collection: calibrating a mobile collection device in real time by using the multi-source correction parameter set, synchronously obtaining underground pipeline point cloud, an earth surface building image and a construction machinery track, and generating a space-time evolution element body with a space-time version label; and dynamic topology evolution modeling: analyzing an element change sequence in the spatio-temporal evolution element body, and constructing a dynamic evolution topology model. According to the method, differential analysis and a conflict backtracking strategy are combined, so that the adaptive updating and decision support capability of the map data in a construction disturbance scene is improved.

The invention belongs to the related technical field of bridge hoisting, and discloses a monocular vision-based bridge hoisting pose real-time measurement method and system, and the method comprises the steps: calibrating the relative position between an optical calibration plate and the upper surface of a prefabricated bridge before hoisting operation: shooting a plurality of calibration images of the upper surface of the prefabricated bridge; obtaining a calibration plate coordinate system and an image coordinate system projection transformation matrix of any image; calculating projection coordinates of the vertex of the upper surface of the prefabricated bridge in the calibration plate coordinate system; on the basis of the multiple calibration images, shape features of the upper surface of the prefabricated bridge are obtained, and the relative position relation is calculated; and measurement in the hoisting process: obtaining the pose of the prefabricated bridge according to the real-time image and the relative position relation obtained through calibration. According to the method, the relative position mapping relation between the optical calibration plate and the prefabricated bridge is accurately established by utilizing multi-view image analysis and geometric constraint calibration before hoisting operation, so that the pose of the prefabricated bridge is accurately measured in real time on the basis of monocular vision.

The invention relates to the technical field of semiconductor material photoelectric detection, and discloses a whole-course calibration method of a microwave photoconductive attenuation tester, which comprises the following steps: steady-state optical calibration: establishing reference mapping from light intensity to absolute carrier concentration; performing sweep frequency perturbation measurement at each concentration working point to obtain multiple groups of complex response data; separating an instrument transfer function from sample differential response sensitivity by adopting a system identification algorithm; an integral differential sensitivity reconstruction curve is converted into an absolute calibration model by using an anchor point; starting closed-loop feedback control to lock a specific phase, and verifying the model; and outputting an absolute calibration model and an instrument transfer function as a static reference and a dynamic operator. According to the invention, the absolute concentration anchor point is established through steady-state optical calibration, integral reconstruction is carried out on the differential response sensitivity decoupled by dynamic frequency sweep measurement, and finally, the anchor point is utilized to determine the integral constant, so that the accuracy and reliability of carrier concentration quantitative analysis are improved.

The utility model discloses hybrid bonding equipment based on visual alignment, which belongs to the field of bonding processing equipment and comprises a bonding assembly, a first displacement mechanism, a second displacement mechanism, a first visual assembly, an optical calibration assembly, a second visual assembly and a bearing table. According to the technical scheme of the utility model, the position coordinates of the calibration point, the chip to be bonded and the mark point on the target chip can be accurately obtained through the corresponding arrangement of the optical calibration assembly, so that the compensation position information between the two chips can be accurately obtained, and the visual alignment of the two chips before hybrid bonding can be realized. The hybrid bonding equipment provided by the utility model is compact in structure, convenient to use, and capable of accurately completing bonding of a to-be-bonded chip and a target chip on a wafer and accurately realizing visual alignment between the to-be-bonded chip and the target chip before hybrid bonding, so that the alignment precision during hybrid bonding of the chips is effectively ensured, errors in the bonding process are reduced, and the production efficiency is improved. And the quality of a chip product is improved.

A navigation system includes: a control circuit configured to: a control circuit configured to: capture a sensor data stream provided by optical sensors, extract lane lines from the sensor data stream, optimize an extrinsic parameter and an intrinsic parameter based on the extract of the lane lines, and compile optimized parameters including the extrinsic parameter and the intrinsic parameter; and a communication circuit, coupled to the control circuit, configured to receive an optical sensor alert for displaying on a device.

The invention discloses an orchard unmanned aerial vehicle multispectral image noise restoration method based on a generative adversarial network, and relates to the technical field of multispectral image noise restoration, and the method comprises the steps: synthesizing a noisy sample containing stripes, photon particles, thermal noise, Rayleigh, shielding, compression artifacts, overexposure and waveband crosstalk on a noise-free reference image through a conditional generative adversarial network; a crosstalk matrix T obtained through optical calibration is introduced; based on the canopy / soil / sky semantic partition, main-cooperation-subdivision level superposition is implemented; generating hierarchical labels by taking energy conservation consistency and thermal noise correlation as thresholds; a branch and region self-adaptive repair module corresponding to classification is arranged in the image-to-image generative adversarial network, and joint loss training containing T regularization is adopted; and outputting the repaired image subjected to physical consistency checking. The method gives consideration to visual quality and spectral fidelity, inhibits cross-band pollution, improves the stability of indexes such as NDVI and NDRE, and is suitable for precision agricultural monitoring.

The utility model relates to the field of needle tube assembling equipment, and discloses a needle alignment mechanism which can detect the position deviation of a needle inserting head and a photographing assembly and improve the machining precision. The device comprises a rack, the bracket is arranged on the rack; the first photographing assembly is arranged on the bracket; the transferring assembly is used for driving the support to move in the up-down, left-right and front-back directions; the pin head is arranged on the bracket; the second photographing assembly is arranged on the rack; and the optical calibration plate is arranged right above the second photographing assembly and located below the first photographing assembly, the upper side and the lower side of the optical calibration plate are each provided with a plurality of positioning marks, and the multiple positioning marks are symmetrically arranged up and down.

The invention discloses a horizontal adjusting device compatible with adsorption of wafers of various specifications. The horizontal adjusting device comprises a mounting bottom plate and three three-point leveling assemblies arranged on the mounting bottom plate. A leveling bottom plate is mounted at the top of the three-point leveling assembly, a wafer vacuum loading disc is fixedly mounted above the leveling bottom plate, and the three-point leveling assembly is used for adjusting the levelness of the leveling bottom plate and the wafer vacuum loading disc; a plurality of microporous ceramics with different sizes are concentrically arranged at the top of the wafer vacuum carrying disc; a plurality of frame wafer supporting columns are arranged at the bottom of the wafer vacuum carrying disc; a side pushing assembly is arranged on the other side of the bottom of the wafer vacuum carrying disc and comprises a plurality of frame wafer pushing columns; a driving plate with a rotatable angle is horizontally arranged between the wafer vacuum carrying plate and the leveling bottom plate, a jacking air cylinder is hinged to the center position of the bottom of the driving plate, and the jacking air cylinder controls the driving plate to move in the vertical direction; optical calibration assemblies are symmetrically arranged on the two sides of the wafer vacuum carrying disc. And the platform can be adjusted to a proper plane angle more accurately, and the adjusting precision is high.

Optical calibration structures for optical probes, optical probe systems that include the optical calibration structures, and methods of calibrating a plurality of optical probes. The optical calibration structures include a reflector, an obstructive structure, and an optical detector. The optical probe systems include the optical calibration structure, a chuck, an optical assembly, and a signal generation and analysis assembly. The methods include methods of operating the optical probe systems and / or methods of utilizing the optical calibration structures.

The application discloses a display screen brightness and chrominance joint compensation mapping generation method, and belongs to the technical field of Micro-LED display correction and optical calibration. The method solves the problem that brightness reproduction and cross-gray-scale chrominance drift are difficult to be considered in existing white field gray-scale correction, and comprises the following steps: acquiring red, green and blue single-channel full-gray-scale first optical measurement data and equivalent white field full-gray-scale second optical measurement data; for a target gray scale, equivalent RGB initial code values are determined according to the second optical measurement data, a limited RGB candidate driving domain is constructed in combination with a preset single-channel search radius and a maximum deviation amount between channels; candidate combined three-stimulus value outputs are estimated based on single-channel three-stimulus value increments and corresponding gray-scale three-stimulus value superposition; a joint target function is constructed by taking the target brightness and a preset reference chrominance as a reference and adding adjacent gray-scale driving code continuity constraints, and an optimal solution is solved as a compensation RGB driving code value; and a gray scale to compensation code lookup table is generated by traversing all the gray scales. The method is used in the field of information display.

The invention discloses a modularized automobile intelligent light-emitting sealing strip system and a control and manufacturing method thereof. The system comprises: a base module having a built-in channel; the optical engine module is integrated in the built-in channel in a pluggable mode and comprises a partition light source unit, a gradient light guide body and a light sensor; and a light-transmitting outer cover module. According to the intelligent dodging control method, brightness distribution is sensed in real time through a sensor network, light source output is adjusted based on dynamic feedback and a partition cascade compensation algorithm, and self-adaptive optical compensation is achieved. According to the integrated manufacturing method, high-efficiency and high-consistency production is realized through optical engine prefabrication, matrix co-extrusion molding, modular integration and an online optical calibration process. According to the invention, the inherent contradiction between the light emitting function and the sealing function is solved, and high-reliability, high-uniformity and intelligent dynamic illumination and interaction for the vehicle are realized.

The application relates to a high-precision optical alignment assembly method of a scanning mirror, and belongs to the technical field of laser radar manufacturing equipment, and solves the technical problems of insufficient precision, no compensation for glue shrinkage, low efficiency and high cost of special equipment in the existing scanning mirror assembly. Based on the light reflection principle, the method characterizes the included angle between the scanning mirror and the motor shaft through light path amplification offset, constructs an optical alignment system by using point laser, mirror group and scale receiving plate, completes coarse adjustment and fine adjustment by cooperating with the scanning mirror adjustment jig, makes the positions of the laser spots on the scale receiving plate coincide after the motor rotates 180 degrees, and then completes UV glue curing through the light curing device, and realizes high-precision assembly by combining the glue shrinkage compensation mechanism and the quantitative verification standard. Through the optical alignment method of light path amplification offset, the quantitative adjustment, the verification standard and the glue shrinkage compensation mechanism are combined, high-precision assembly of the scanning mirror and the motor shaft is realized, the glue shrinkage preset offset compensation scheme is established, and the angle offset problem of UV glue curing shrinkage is avoided.

The invention relates to the technical field of computer vision, and discloses a self-adaptive CCD visual analysis system for special-shaped hardware, and the system comprises a dynamic optical calibration module, an edge detection module, a dynamic region of interest segmentation module, a self-adaptive parameter analysis module, a coordinate construction mapping module and a global grabbing pose determination module. Collecting an initial image of the hardware and performing optical calibration; performing edge detection on the calibrated image to obtain a complete contour of the hardware; performing region segmentation on the complete contour to obtain a dynamic region of interest; performing adaptive parameter analysis on the dynamic region of interest to obtain accurate characteristic parameters; constructing a workpiece coordinate system, and mapping the accurate feature parameters to the workpiece coordinate system to obtain an associated feature data set; global grabbing pose information is determined based on the grabbing point definition rule and the associated feature data set, and the problem that the positioning precision is poor due to the fact that a visual analysis system is difficult to adapt to workpiece reflection changes and complex structures can be solved.

The present invention provides a debugging method and an optical detection system for an optical system. First, the present invention builds an optical calibration system so that an interferometer can receive a field light signal and a wavefront light signal. Second, the present invention can quickly locate the position of a calibration objective lens and a second reflector by utilizing a calibration through-hole. Third, the present invention replaces the calibration through-hole with a calibration slit, which can greatly improve the positional accuracy when the focus of the objective lens coincides with the second reflector. Third, the present invention replaces the calibration objective lens with a detection objective lens. Under the premise that the position of the spherical center of the second reflector is determined, the present invention can coincide the focus of the detection objective lens with the spherical center of the second reflector. Finally, the present invention sets a certain field angle for the detection objective lens when replacing the calibration objective lens, so that wavefront information generated by a high-NA objective lens under the full field of view can be obtained. The present invention has the advantages of simple structure and convenient operation.

The invention relates to an optical axis calibration method and system, a ghost image measurement method and computer equipment. The method is applied to an optical axis calibration system comprising an image acquisition device which is subjected to pose adjustment by a first adjustment mechanism and an adjustment jig which is subjected to pose adjustment by a second adjustment mechanism and is provided with a display module to be tested, and comprises the following steps: controlling the first adjustment mechanism and / or the second adjustment mechanism to perform rotation adjustment, aligning a cross calibration image displayed by the display module to be tested with an image reference cross of the image acquisition equipment; a second adjusting mechanism is controlled to perform translation adjustment, so that multi-order ghost images formed by the ghost image calibration image displayed by the display module to be tested in the picture of the image acquisition equipment are regularly distributed; and the first adjusting mechanism is controlled again to perform rotation adjustment, so that the cross calibration image displayed by the display module to be tested is aligned with the image reference cross of the image acquisition equipment. By adopting the method, ghost image interference can be reduced, the optical calibration accuracy is optimized, and the ghost image measurement accuracy is improved.

The invention discloses an online closed-loop calibration method and a dynamic compensation system for additive manufacturing optical precision. By deploying a light spot position sensor network (including but not limited to a PSD, a CCD, a CMOS and the like), light spot position data of a galvanometer system on an incident light path and / or a processing plane are captured in real time, and a dynamic mapping relation between light spot offset and galvanometer control parameters is established. A time-sharing detection strategy is adopted, optical calibration is automatically executed between printing layers or within a specified period, a galvanometer control instruction is corrected in real time through a reverse compensation algorithm, and submicron-level optical precision closed-loop control is achieved. The method solves the problem of misalignment of the light spot position caused by thermal drift and mechanical vibration in processes such as SLM / SLS in a breakthrough manner, does not depend on a specific hardware architecture, and is suitable for a single galvanometer, multi-galvanometer splicing and dynamic focusing system.

The embodiment of the utility model provides a graphite electrode surface detection system which comprises a detection table used for supporting the whole detection system; the guide rail sliding mechanism is arranged on the detection table, the guide rail sliding mechanism comprises a ball lubricating groove, the guide rail sliding mechanism is provided with a reinforcing rib plate, and the guide rail sliding mechanism is provided with a damping elastic gasket; the movable bracket is mounted above the guide rail sliding mechanism; the detection probe fixing seat is connected with the movable bracket; the optical calibration module is arranged at one end of the detection table; wherein an automatic lubricating oil supplementing device is arranged in the ball lubricating groove; the cross section of the reinforcing rib plate is I-shaped; the lower end of the optical calibration module is in bolted connection with a leveling base which is used for finely adjusting the height of the optical calibration module. Through the scheme of the embodiment of the invention, the vibration influence in high-speed detection can be reduced.

The invention relates to the technical field of optics, in particular to an optical calibration system calibration method, an optical simulation unit and an optical calibration system.The method comprises the steps that the optical simulation unit is transferred to a preset fixing station; determining a first relative pose relation of the vision measurement module relative to the calibration piece and determining a second relative pose relation of the optical measurement module relative to the calibration piece; and determining a system calibration relationship between the vision measurement module and the optical measurement module based on the first relative pose relationship and the second relative pose relationship. The invention mainly aims to provide a calibration method of an optical calibration system, which is used for calibrating the position of an optical device in the optical calibration system.

The application discloses an optical calibration device and a method for calibrating a coordinate system in which an optical platform is located. The optical calibration device can calibrate the positions of the optical platform and an analyzer in the optical path of the optical platform, so as to ensure the accuracy and stability of optical testing. Compared with the level and high-precision mechanical processing used in the prior art, the optical calibration device can effectively improve the optical measurement accuracy. In addition, the optical calibration device can calibrate the X-axis, Y-axis and Z-axis of the optical platform, and has the characteristics of simplicity and convenience.

This invention relates to the field of semiconductor manufacturing technology, and particularly to a method and structure for SnBi ultrasonic low-temperature hot-press bonding based on a porous metal framework. The method includes the following steps: S1: Preparing a porous metal buffer layer with interconnected micropores on the bonding surface of a first connector; S2: Mounting the first connector and a second connector, and placing Sn-Bi low-temperature solder between the bonding surfaces of the porous metal buffer layer and the second connector, aligning the solder and the porous metal buffer layer using optical calibration during mounting; S3: Performing ultrasonic-assisted variable pressure hot-press bonding on the mounted components, including a sequential ultrasonic-assisted wetting and activation stage and a hydrostatic forced infiltration and filling stage; S4: Rapidly cooling under pressure until the solder solidifies and forms a dense composite interconnect structure. This invention can significantly improve the mechanical toughness and electrical and thermal conductivity of the solder joints during low-temperature hot-press bonding with Sn-Bi-based low-temperature solder.

The invention discloses an optical axis registration system and method for a large-scale optical system with limited installation and adjustment space. The system comprises a front optical machine system of which emergent light is parallel light and a rear optical machine system of which incident light is parallel light, the front optical machine system comprises a front optical machine system optical axis marking mirror, and the rear optical machine system comprises an electric control reflex mirror and a rear optical machine system optical axis marking mirror; an auxiliary optical calibration component is placed in a butt joint optical path of the front optical machine system and the rear optical machine system, and an autocollimator is further arranged, wherein the optical axis of a test light beam emitted by the autocollimator is perpendicular to the butt joint optical path of the front optical machine system and the rear optical machine system; the auxiliary light correction component comprises a first parallel plate, a first 45-degree reflector, a second 45-degree reflector and a second parallel plate. A first 45-degree reflecting mirror and a second 45-degree reflecting mirror which form an included angle of 90 degrees are arranged between the first parallel flat plate and the second parallel flat plate which are arranged in parallel. According to the invention, high-precision registration of the optical axes of two large-size and large-mass large optical systems can be realized under the condition that the installation and adjustment space is limited.

The invention relates to an optical calibration system (30), comprising: - a support (32), - an imaging device (34) mounted on the support (32), the imaging device (34) comprising: • a camera comprising an image generation unit and an objective, • a collimation unit suitable to emit a collimated beam convoying an image of a so-called collimation object, the imaging device (34) being selectively switchable between two modes of operation among: • an autocollimation mode in which both the image generation unit and the collimation unit are activated, and • an imagery mode in which only the image generation unit is activated.

This invention discloses a horizontal adjustment device compatible with adsorbing wafers of various specifications, comprising a mounting base plate and three three-point leveling components mounted on the mounting base plate; a leveling base plate is mounted on top of each three-point leveling component, and a wafer vacuum carrier is fixedly mounted above the leveling base plate. The three-point leveling components are used to adjust the levelness between the leveling base plate and the wafer vacuum carrier; multiple microporous ceramics of different sizes are concentrically arranged on the top of the wafer vacuum carrier; multiple frame wafer support pillars are arranged at the bottom of the wafer vacuum carrier; a side-pushing component is arranged on the other side of the bottom of the wafer vacuum carrier, and the side-pushing component includes multiple frame wafer push pillars; a rotatable dial is horizontally arranged between the wafer vacuum carrier and the leveling base plate, and a lifting cylinder is hinged at the center of the bottom of the dial, which controls the dial to move vertically; optical calibration components are symmetrically arranged on both sides of the wafer vacuum carrier; the device can more accurately adjust the platform to a suitable plane angle with high adjustment precision.

A visual guidance system for use in a surgical procedure include a calibration operation of a tip of a surgical drill. In particular, the system includes capturing images of a drill tip and generating a reconstruction volume shape of the drill tip to enable tracking of the drill tip. The system captures images of the drill tip in tilting motion to determine cutting edge contour data of the drill tip. The system further captures images of the drill tip in rotation and identifies point cloud data of the drill tip. The system further includes generating a three-dimensional surface data of the drill tip, a cutting plane, and a cutting edge contour of the drill tip. Given the three dimensional surface data and plane data, the system further generates guidance data for providing a navigation on surgical procedure using three-dimensional graphical representation of the surgical drill.

The invention discloses a triple-band optical auto-calibration fundus imaging apparatus and method for robotic ophthalmic OCT imaging, comprising: a central optical path including a fundus lens, short-pass dichroic mirror, intermediate optical calibration module I, long-pass dichroic mirror, intermediate optical calibration module II, and infrared camera; two lateral infrared cameras disposed at specific angles relative to the central optical path; an annular light ring surrounding the fundus lens; a visual induction display positioned below the long-pass dichroic mirror; an OCT sample arm with electric lift control; and an OCT optical path beneath the short-pass dichroic mirror. The apparatus captures facial, ocular, and gaze direction data, directing OCT beams through the pupil, eliminating the need for head fixation during robotic ophthalmic OCT imaging. Visual guidance reduces gaze-induced artifacts and automatically adjusts the OCT optical path to accommodate different visual acuities, enhancing robotic ophthalmic imaging efficiency and quality.

The invention discloses a VR display parameter adaptive setting method based on ambient light perception, and particularly relates to the technical field of virtual reality display control, electrical and optical calibration of an ambient light sensor is completed under a unified time base and a fixed step length, and physical quantities such as illumination intensity and related color temperature after unit conversion and noise suppression are obtained; environment and content features are synchronously extracted in the sliding window, time sequence alignment is carried out, and an environment / content double-baseline and hardware reachable domain model is established; executing priority arbitration according to a threshold value and a shortest residence criterion, linking brightness, white points, gamma and black bits in a reachable domain, and planning smooth transition of an asymmetric rate; a closed loop set in a display pipeline is grounded through binocular consistency control and read-back check of frame synchronization, and user preference superposition and evidence filing are supported.

The utility model relates to the technical field of optical calibration, and discloses auxiliary calibration equipment for an optical instrument. The auxiliary calibration equipment for the optical instrument comprises an equipment base, an equipment adjusting and detecting mechanism is mounted above the equipment base, an equipment calibration mounting mechanism is mounted above the equipment adjusting and detecting mechanism, and the equipment adjusting and detecting mechanism comprises a calibration device mounted above the equipment base. The calibration device is arranged above the equipment base, the displayer is arranged above the calibration device, the displayer can display the direction degree of the calibration device, the calibration device is fixedly connected with the main rod through the installation block and the lantern ring, and the calibration device is located under the optical instrument. The calibration device and the optical instrument rotate synchronously, and when the optical instrument needs to be debugged at a specified angle, direct observation can be performed through the calibration device, so that the calibration and debugging operation of equipment is simple.

The application discloses a positioning method and system combining optical positioning and mechanical positioning, and belongs to the technical field of surgical navigation. The method comprises the following steps: before surgery, high-precision calibration of the system is performed by using an optical calibration method; and during surgery, a pose of a target object is measured by using a non-shielding mechanical positioning method. The non-shielding mechanical positioning method comprises the following steps: according to angles read by encoders at each joint in real time and a kinematic model obtained by using the optical calibration method before surgery, a transfer matrix of the object relative to a reference system is obtained, so that the relative position and attitude of the measured object are calculated. By using the processing scheme, the flexibility of the optical calibration and the accuracy of the mechanical positioning are combined, so that the cost is reduced, and the high absolute positioning precision of the surgery in a narrow space is ensured.

The embodiment of the invention provides a light source position correction system for laser direct writing equipment and related equipment, which are used for saving the production cost and improving the production efficiency of the laser direct writing equipment. The correction system in the embodiment of the invention comprises an optical calibration plate, wherein the optical calibration plate comprises a phase change layer and an interference enhancement dielectric layer; the phase change layer is made of a chalcogenide phase change film material, and the mounting position of the optical calibration plate is relatively fixed with the working space of the laser direct writing equipment; the optical read-write module can emit a first characteristic pulse and a second characteristic pulse; wherein the first characteristic pulse is used for exciting a laser irradiation area of the phase change layer to generate phase change, and a preset mark in an amorphous state is generated; the second characteristic pulse is reflected in the sensor camera to form an observation image with a preset mark after the interference is weakened by the interference enhancement dielectric layer; the calculation module is used for calculating the position deviation of the light source according to the deviation between the preset mark and the observation image.

Automated calibration of a machine vision system employs a calibration target assembly mountable to a robotic transfer assembly. An inventory management system includes a robotic transfer apparatus, a calibration target assembly, and a stereo vision assembly. The robotic transfer apparatus includes a support assembly and a transfer assembly. The support assembly is configured for repositioning the transfer assembly relative to the support assembly. The transfer assembly is rotatable relative to the support assembly. The calibration target assembly mountable to the transfer assembly and includes optical calibration targets. The stereo vision assembly is configured for imaging the optical calibration targets to generate calibration image data that is processed to generate calibration data for the machine vision system.