34 results about "Optical axis deviation" patented technology

The invention belongs to the technical field of optical system aberration analysis, and discloses an experimental device for measuring and correcting image distortion of an optical imaging system, which comprises an optical axis testing device and an optical distortion testing platform, and the optical distortion test platform is used for testing optical distortion of the optical imaging system to be tested and integrating optical distortion data with optical axis deviation to obtain an image distortion fitting coefficient and a distortion correction model of the optical imaging system. According to the invention, the image distortion of the optical imaging device can be measured, the image distortion can be corrected, the imaging device can correct the deviation between the optical axis and the center of the target surface when the system is installed and adjusted, the optical distortion of the whole optical system can be corrected, and the method has guiding significance for the application of detecting and identifying the accurate position of a target by using the optical system.

The invention relates to the technical field of optical cross connection device calibration, and discloses an FAU array self-calibration collimation and low-crosstalk coupling system for an OCS. According to the system, optical axis deviation, light spot parameters and inter-unit crosstalk data of each unit are acquired in real time through a distributed optical sensing array. And the light path state mapping module constructs a dynamic topological mapping graph according to the data, and globally represents the array coupling state. The self-adaptive calibration module calculates calibration requirements and generates an original instruction, and the crosstalk suppression coordination module analyzes the estimated influence of instruction adjustment on crosstalk of adjacent units, restrains the instruction which may deteriorate the crosstalk, and generates an optimized calibration instruction. And the collaborative execution module drives the micro actuator to complete submicron-level pose adjustment according to the final instruction. According to the system, active collaborative optimization of alignment precision and crosstalk suppression in the calibration process is realized, and the overall performance and stability of the system are improved.

To provide an optical axis deviation detecting method capable of easily detecting the inclination of an optical axis with a relatively simple configuration, an optical axis adjusting method for correcting the inclination when the optical axis is inclined, an optical axis deviation evaluating means, and a mounting device using the same.SOLUTION: Imaging a mark pair a plurality of times and associating the mark pair with an angle of rotation while rotating a transparent plate with a normal direction in a plane as a rotation axis direction in a state in which the mark pair is within a field of view, the mark pair including a pair of marks provided on both surfaces of the transparent plate which is disposed parallel to the plane and of which a thickness and an optical refractive index are known; To provide an optical axis deviation detection method for specifying an inclination angle from a positional relationship between an imaging means and a pair of marks provided on a transparent plate when an apparent inter-mark distance becomes maximum or minimum, an optical axis adjustment method for correcting an inclination when there is an optical axis inclination, an optical axis deviation evaluation means, and a mounting device using the same.SELECTED DRAWING: Figure 1

The invention is suitable for the field of multi-optical-axis off-axis amount measurement, provides an automatic optical-axis off-axis amount measurement method and device, and realizes accurate and automatic measurement of multi-optical-axis off-axis amount by adopting a design that a wide-spectrum detector and a collimator are separated and combining high-precision displacement feedback. Through the front pyramid, emission and receiving light path auto-collimation is realized, and the problem of optical axis deviation introduced by the test equipment due to separation design is solved. The system adopts an integrated design, the same light tube light path is adopted for transmitting and receiving, visible light and infrared light sources are subjected to fusion design, and the overall size of equipment is reduced. According to the invention, the problem that the existing multi-optical-axis calibration equipment can only calibrate the axis and cannot accurately and automatically measure the multi-optical-axis deviation value is solved, and a technical approach is provided for high-precision multi-optical-axis calibration and off-axis data acquisition.

The invention particularly relates to an electronic axis calibration method of a ground irradiation guiding system, which comprises the following steps of: carrying out field optical axis calibration on a television imaging channel based on a cooperative positioning relationship between a laser component and the television imaging channel; and performing optical axis calibration on the infrared imaging channel by using the calibrated spatial registration relationship between the television imaging channel and the infrared imaging channel. Any target serves as a reference system, the cross optical axis position of any view field of infrared and television images is adjusted through interface pictures, the problem that the optical axis deviation of television, infrared and laser sensors in a ground irradiation guiding system is difficult to adjust is solved, rapid compensation of multi-optical-axis deviation is achieved, the sensors do not need to be disassembled, assembled and adjusted, operation is easy, and cost is low. A user can adjust at any time according to needs, and the product maintainability is remarkably improved.

A spectrometer including a laser for generating a laser beam, a lens for directing the laser beam to a location of a sample, and a component for directing the laser beam to the lens so as to be co-axial with the lens' optical axis, the spectrometer including a beam splitter for directing the part of the laser beam towards a sensor arranged such that part of the laser beam can be used for monitoring alignment of the laser beam with the lens' optical axis, and wherein the spectrometer comprises a laser beam path correction element. Optionally the spectrometer includes an element for directing the part of the laser beam towards a sensor.

The invention discloses line laser lens mounting equipment which comprises a rack, a control system, an industrial computer, a bearing motion module, a visual alignment module and an execution tool module, wherein the industrial computer is generally integrated with a motion control unit and an image processing unit. The imaging feedback of the sensor to be assembled is acquired through the image acquisition device, and the XY platform is driven by the control system to drive the whole assembly to perform closed-loop fine adjustment, so that sub-pixel-level automatic alignment is realized, personal errors are thoroughly eliminated, the most core optical axis deviation problem influencing the performance of the linear laser sensor is solved, and the precision of the linear laser sensor is improved. By means of the technical scheme, mass production of high-precision modules becomes possible, three key processes of visual alignment, dispensing and curing are seamlessly integrated into one device, and through control of a preset program, the device automatically completes the whole process from PCB feeding, gluing, lens picking and pre-placing, visual guidance precision alignment to final curing. And the production efficiency and the product consistency are greatly improved, and the large-scale production requirement is met.

This utility model discloses a binoculars optical axis calibration device, relating to the field of optical fixture technology. It includes a worktable, with a collimator fixedly connected to its top end, an adjustment device fixedly connected to its top end, a placement platform mounted on the moving end of the adjustment device, a placement component fixedly connected to its top end, and a binoculars front lens fixedly connected to its top end. This utility model, through the coordinated action of the moving device, the worm gear transmission mechanism, and the limiting device, synchronously adjusts the angle and position of the binoculars, avoiding the cumbersome steps of separately adjusting the positions of the placement component and the binoculars front lens and verifying their fit. Utilizing the deceleration characteristics of the worm gear transmission, it achieves high-precision fine-tuning, ensuring the accuracy of optical axis deviation measurement. The flexibility of lateral and angular adjustment makes it adaptable to different specifications and models of binoculars, ensuring the practicality of the device.

The invention provides a total station accurate measurement method based on intelligent image analysis and a total station system, which are applied to the technical field of measurement and intelligent perception, and the method comprises the following steps: determining the final pixel coordinate and image residual error of the center of a target based on a front view image; establishing a mapping relation between the final pixel coordinates and the direction angle of the distance measuring shaft of the total station to obtain the direction angle and the pitch angle of the target; calculating an optical axis deviation angle and driving a total station servo system to align; calculating a depth initial value based on the parallax of the main and auxiliary view images, and calculating a distance measurement error by combining the measured distance of the total station; and constructing a joint optimization function including the image residual error, the distance measurement error and the optical axis deviation angle, and realizing system optimization by minimizing the joint optimization function. Through deep coupling of the image recognition module, the distance measurement module, the attitude sensing module and a control feedback algorithm, optical axis self-calibration, distortion self-calibration and image stabilization compensation of the total station in a complex environment are realized, and the automation degree and the measurement precision are remarkably improved.

A spectrometer comprising a laser for generating a laser beam, a lens for directing the laser beam to a location of a sample, and a component for directing the laser beam to the lens so as to be co-axial with the lens' optical axis, the spectrometer comprising a beam splitter for directing the part of the laser beam towards a sensor arranged such that part of the laser beam can be used for monitoring alignment of the laser beam with the lens' optical axis, and wherein the spectrometer comprises a laser beam path correction element. Optionally the spectrometer comprises an element for directing the part of the laser beam towards a sensor.

The application provides a wind measurement radar telescope, which comprises a shell and an adjusting device, the adjusting device comprises a telescopic sleeve, an adjusting sleeve and a threaded sleeve, the telescopic sleeve is connected with the inner wall of the shell, and the telescopic sleeve is provided with double-stage sealing rings; the telescopic sleeve is connected with the adjusting sleeve through the threaded sleeve. The telescopic sleeve is provided with double-stage sealing rings, when the telescopic sleeve is deflected by external force, the space vector restoring force is generated by the differential deformation of the double-stage sealing rings, the optical fiber axis and the objective lens optical axis deviation is less than or equal to 15 microns, the asymmetric deformation vector synthesis effect is formed, the optical fiber coupling efficiency is effectively ensured, the double-stage sealing ring structure has the buffering and damping effect on vibration and impact, the differential elastic body can respectively cope with high-frequency vibration and low-frequency impact, and the stability of the telescope in the working and transportation process is ensured. The threaded sleeve is moved forward and backward by rotating the adjusting sleeve, and finally the telescopic sleeve is driven to move.

According to the automatic coupling and packaging system of the single-fiber wavelength division multiplexing optical engine, the first moving mechanism drives the first mounting mechanism and the second mounting mechanism to move, so that the vertical height and the mounting angle of the Lens module can be accurately adjusted, and the optical axis alignment precision of the Lens module and the HDMI board is greatly improved; the problem of large optical axis deviation during manual installation is effectively solved, the wavelength division multiplexing optical signal loss is reduced, and the transmission efficiency and the bandwidth performance of the single-fiber wavelength division multiplexing optical engine are improved. According to the invention, the automation of the docking process is realized, the subjectivity and uncertainty of manual operation are avoided, the key parameters such as the assembly precision and the dispensing amount of each batch of products are kept consistent, the performance consistency of the products is greatly improved, and the requirements of large-scale production are met.

The application provides a space laser communication optical axis control device and method, which utilizes a photoelectric detector and a fast mirror 1 in a first-stage fine tracking loop, utilizes a nutation assembly and a fast mirror 2 in a second-stage fine tracking loop, and corrects the tracking zero of the first-stage fine tracking loop according to the bias of the second-stage fast mirror. The application is applied to space laser communication, and the cooperation of the two-stage fine tracking loops makes the beam control system have the advantages of being capable of inhibiting beam jitter caused by high frequency and strong vibration, and being capable of compensating the deviation between the communication optical axis and the tracking optical axis in real time.

A kind of fire area fast estimation method based on passive location.The present application relates to the field of image processing technology, in particular to a kind of method for calibrating laser optical axis deviation by target positioning in the air.The present application loads the digital map and digital elevation model file of target area actual measurement image, combines the pose data corresponding to single frame image to carry out orthographic transformation to image, and completes the work of foreground extraction and fire area estimation on this basis.The method comprises the following steps: preparing digital elevation model data set of the region to be measured;Taking the actual measurement image of the region to be measured;Solving the field center position;According to the field center position, find out the digital elevation model file corresponding to the actual measurement image;Orthographic transformation is carried out to obtain the image of the straight-down view angle;According to the image of the straight-down view angle, based on the digital elevation model file, the area of the region to be measured is solved;Extracting image foreground estimates the fire area.

To provide an optical axis misalignment evaluation means and an optical axis adjustment means, or an optical axis misalignment evaluation method and an optical axis adjustment method, that can evaluate and adjust the optical axis misalignment of a field recognition means with high precision. [Solution] The device comprises a first subject having a minute through-hole, a laser irradiation means for irradiating laser light in a direction perpendicular to the second surface through the minute through-hole, a second subject that responds to the wavelength of the laser light and emits a wavelength different from that of the laser light, and a control unit having the function of analyzing the image acquired by the two-field recognition means, wherein the oscillation wavelength of the laser light is outside the sensitivity range of the two-field recognition means, the two-field recognition means recognizes the minute through-hole in the first subject and also recognizes an emission point of a wavelength different from that of the laser light emitted by the second subject, and the calculation unit evaluates the optical axis deviation from the relative position information of the image of the minute through-hole and the emission point.

The utility model discloses an optical fiber coupler, which comprises a coupler main body, a lens seat arranged in the coupler main body, a focusing nut screwed at the rear end of the coupler main body, a spring sleeved at the front end of the lens seat, a strip-shaped clamping groove opened on the side surface of the lens seat, a jackscrew screwed at the side surface of the coupler main body, and a lower end of the jackscrew inserted in the strip-shaped clamping groove in a sliding manner. Relates to the technical field of optical fiber couplers, and is simple in structure, simple to process, low in cost and high in stability, and adopts a structure that a lens seat is separated from a focusing nut, so that a lens is always kept in a fixed direction in a focusing process, optical axis deviation is avoided, coupling stability is improved, and precise matching between a side jackscrew and a long-strip clamping groove is designed. The rotation freedom degree of the lens holder is effectively limited, it is ensured that the lens always moves in the axial direction in the focusing process, and the alignment precision and the system stability are further improved.

The invention provides a laparoscopic instrument space positioning and hyper-visual field display method combining laser radar and motion sensing, and belongs to the technical field of laparoscopic instrument space positioning. Comprising the steps of S1, arranging a plurality of laser radars in an operating room, and collecting three-dimensional point cloud data of the operating room in real time, S2, collecting motion data of a laparoscopic instrument in an operation, S3, constructing an ith instrument space deviation coefficient and an instrument posture stability coefficient according to an instrument motion data set, S4, constructing an ith instrument comprehensive position stability coefficient, and S5, calculating the ith instrument comprehensive position stability coefficient according to the ith instrument comprehensive position stability coefficient. And S5, realizing frame-by-frame space alignment between the rendered image and a real image acquired by the laparoscope. By collecting vibration deviation, rod body stress shifting quantity, an optical axis deviation angle, rod body micro-deformation quantity and handle disturbance acceleration in real time and calculating a space deviation coefficient and an attitude stability coefficient of the ith instrument, a space correction instruction and an attitude correction instruction can be actively generated, and the instrument can be accurately positioned.

An optical connection structure (10) according to the present invention comprises a first waveguide core (111), a second waveguide core (121), a first tapered waveguide core (131), and a second tapered waveguide core (132), and: the first and second tapered waveguide cores are configured from a photo-cured photocurable resin; an end surface of the first waveguide core is disposed facing an end surface of the second waveguide core; the base ends of the first and second tapered waveguide cores are respectively connected to the end surfaces of the first and second waveguide cores; the tip end of the first tapered waveguide core and the tip end of the second tapered waveguide core are connected; and the respective core diameters of the first and second tapered waveguide cores increase from the base ends to the tip ends thereof.　The present invention thereby provides an optical connection structure that can reduce optical loss and improve optical axis deviation tolerance.

The invention provides an automatic calibration method and system suitable for mass production of laser radars, especially quantum laser radars. Comprising the steps of collecting an optical axis deviation angle and a mechanical positioning error of a to-be-calibrated radar, and establishing an initial correlation characteristic set by using a support vector machine; extracting peak delay and amplitude fluctuation characteristics of the electronic response signal, and calculating a photoelectric coupling coefficient through clustering analysis; and generating a radar difference vector in combination with the offset vector, calculating a calibration parameter based on the mode length, and driving an execution mechanism to finely adjust the optical module or write firmware compensation to complete closed-loop calibration. According to the invention, quantitative modeling and soft-hard cooperative compensation of multi-physics field coupling errors are realized, the calibration precision is improved to a millimeter level, the distance measurement deviation of the quantum laser radar caused by temperature drift is effectively solved, and the production efficiency and consistency are both considered.

An optical axis deviation angle correction device includes: a camera that has a lens and captures an image including a target whose position is known; and a controller that draws a mark indicating a position of an optical axis of the lens on a captured image of the camera, calculates a deviation angle of an optical axis of the lens with respect to an imaging direction of the camera based on a positional relationship between the mark and the target in the captured image, and corrects a position of the mark in a manner that the mark in the captured image overlaps with the target based on the deviation angle of the optical axis.

The application provides a laser system multi-optical-axis in-field coaxiality detection device, method, equipment and medium, and comprises a target simulation module (5) for generating a parallel light beam simulating an infinite target; a reference calibration module (3) comprising a driving mechanism for driving a reference reflection element (301) to move into or out of a light path, in a working state, the reference reflection element (301) receives the parallel light beam from the target simulation module (5) and returns along the original path to establish an absolute zero position reference independent of a measured device (1); a light beam transformation module (2) for receiving detection laser emitted by the measured device (1) and performing light beam aperture transformation; a photoelectric detection module (7) for receiving light beams and performing spot imaging; and a data processing and control module (8) for controlling the cooperation of various components, collecting images and solving optical axis deviation, so as to solve the problems that the existing high-energy laser system optical axis in-field detection means has incomplete shaft system coverage, the detection precision cannot be quantified, and the detection reference consistency is difficult to guarantee.

The invention discloses a laser communication load optical crankshaft deviation online compensation device and method based on temperature gradient monitoring, and belongs to the technical field of laser communication. The technical problems that an existing active thermal control technology is limited by the number of sensors and heaters on a satellite, response to rapid temperature changes is lagged, and residual thermally-induced deformation still affects an optical axis and wavefront are solved. A double-parameter optical fiber sensing structure capable of monitoring temperature and stress at the same time and heating sheets are arranged on a load, data are collected in real time, and the heating sheets at corresponding positions are directly started and stopped aiming at abnormal temperature and abnormal point positions; and meanwhile, a temperature field model is constructed, the model is simulated to obtain the coaxiality variation and direction of the temperature difference and the receiving and transmitting light path deviation, and reverse equal angle correction is performed through a fast reflecting mirror to directly counteract optical axis deviation and wavefront influence caused by residual thermally-induced deformation. The method is mainly used for online compensation of the deviation of the laser communication load optical crankshaft.

The invention belongs to the technical field of sighting telescope, and particularly relates to a thermal imaging sighting telescope and firearm, the thermal imaging sighting telescope comprises an objective lens assembly and a machine body assembly, the machine body assembly comprises a shell and a machine core arranged in the shell, the objective lens assembly comprises an objective lens barrel and an infrared lens arranged in the objective lens barrel, the objective lens barrel is arranged in the shell, and the infrared lens is arranged in the shell. One end of the objective lens barrel is rigidly connected with the movement, and the other end of the objective lens barrel is connected with the shell through an elastic damping device. One end of the objective lens barrel is rigidly connected with the movement to ensure that the objective lens barrel and the movement do not move relatively, so that the integrity of an optical system and the imaging stability are ensured, and image blurring caused by optical axis deviation is avoided; the other end of the objective lens barrel is connected with the shell through the elastic damping device, elastic deformation can occur and energy can be dissipated when impact loads generated by falling or recoil force and the like are borne, and therefore loads transmitted to a machine core and an infrared lens are greatly attenuated, and the impact resistance reliability of a product is improved.

The invention relates to the technical field of auxiliary intelligent driving, in particular to a vehicle-mounted camera image stabilization integrated device and system and a control method, and aims to effectively compensate optical axis deviation caused by vehicle movement and vibration by adjusting an optical path in real time by using a fast reflecting mirror during imaging exposure, realize active image stabilization of an optical layer and improve the imaging quality. The image definition is obviously improved, and the motion blur is inhibited. According to the scheme, the imaging quality is guaranteed from the source, the delay problem caused by a traditional image post-processing algorithm is avoided, and the perception delay of the auxiliary driving system is greatly reduced. Therefore, the system can obtain the environment information more quickly and accurately, the response speed and decision reliability of the ADAS under the scenes of target recognition, lane keeping, automatic emergency braking and the like are improved, and the driving safety is enhanced. Meanwhile, the integrated design is compact in structure and high in response frequency, has good engineering applicability and environmental adaptability, and provides a high-quality and low-delay visual perception basis for intelligent driving.

The utility model discloses a photoelectric tracker automatic axis calibration device and a photoelectric tracker, the photoelectric tracker automatic axis calibration device comprises a fast control reflector arranged in a load box, the load box is rotatably connected with a rotary table, a Kuder mirror group is arranged in the rotary table, and the fast control reflector is located on an emergent light path of the Kuder mirror group. A spectroscope is arranged on a reflection light path of the rapid control reflector, a reflection surface of the spectroscope is opposite to a reflection surface of the rapid control reflector, and an optical axis detection mechanism is arranged on a transmission light path of the spectroscope and connected with the rapid control reflector. The optical axis detection mechanism is used for detecting a laser optical axis angle and outputting an optical axis detection signal. The laser reflected by the spectroscope enters the emission optical system. According to the utility model, the optical axis detection mechanism detects the optical axis direction of the laser after being turned by the Kuder optical path, and when the optical axis deviates, the rapid control reflector is controlled to adjust the angle, so that the optical axis can be rapidly corrected, and the parallelism of the laser optical axis and the detection optical axis is ensured.

The application relates to a centering mechanism and a scanning electron microscope provided with the same, which is used for centering and calibrating an electron beam in the scanning electron microscope, and comprises an electron gun cavity and a mounting cavity. A first through hole is formed in the electron gun cavity, a first boss is arranged on the side of the electron gun cavity facing the mounting cavity, and the first boss is annular. A mounting groove is formed in the side of the mounting cavity facing the electron gun cavity, a distance is arranged between the outer side wall of the first boss and the inner side wall of the mounting groove, a mounting hole suitable for mounting a component aligned with the electron beam is formed in the groove bottom of the mounting groove, a first adjusting piece is movably arranged on the side wall of the mounting cavity where the mounting groove is formed, and the first adjusting piece penetrates the side wall of the mounting cavity. A plurality of first adjusting pieces are arranged in a spaced distribution along the circumference of the mounting groove. The centering and adjusting of the electron beam are realized, the scanning electron microscope reaches the best state, and the influence of the optical axis deviation on the resolution and the key parameter indexes of the machine table is reduced.

A gimbal camera azimuth angle recognition method and device, electronic equipment, and storage medium are disclosed. The method comprises: controlling a target gimbal camera to perform each reference adjustment operation, so that a reference mark on a reference device is within a preset area range of the center of an imaging picture of the target gimbal camera; determining reference angle information of the target gimbal camera after each reference adjustment operation, the reference angle information comprising an azimuth angle corresponding to an imaging picture optical axis and an azimuth angle corresponding to a relative north direction gimbal horizontal angle when each reference adjustment operation is completed; and based on the reference angle information of the target gimbal camera after each reference adjustment operation, determining reference offset information of the target gimbal camera, which is used to recognize the azimuth angle of the target gimbal camera. The scheme automatically recognizes the azimuth angle corresponding to the imaging picture optical axis, and can correct errors caused by optical axis deviation, greatly improving the target positioning accuracy when image shooting is performed.

In the present invention, a first optical element group (51) is displaced along an optical axis (J1) to thereby adjust a projection magnification of a projection optical system (45). A second optical element group (52) is displaced to thereby displace the optical axis (J1) in a direction perpendicular to the optical axis (J1). A storage unit stores correction information indicating a relationship between the projection magnification and the displacement of the second optical element group (52) required to cancel out an optical axis deviation. The optical axis deviation is the deviation of the optical axis (J1) from a reference optical axis, said deviation occurring in association with the displacement of the first optical element group (51) during adjustment of the projection magnification. A drawing control unit causes the second optical element group (52) to be displaced on the basis of the projection magnification of the projection optical system (45) and the correction information, canceling out the optical axis deviation occurring during adjustment of the projection magnification. As a result, it is possible to improve drawing accuracy by suppressing the optical axis deviation occurring in association with adjustment of the projection magnification of the projection optical system (45).

The present application belongs to the field of aviation remote sensing and intelligent control technology, and particularly relates to a kind of aviation imaging system attitude error compensation method, comprising: S1: real-time acquisition of the attitude measurement data of aviation imaging system;S2: attitude error is decomposed into linear error component and nonlinear error component;S3: construct nonlinear error prediction model based on NAR-LSTM network;S4: construct compensation parameter optimization model based on DDPG strategy, attitude error and nonlinear error prediction value are used as state input, and Actor network is used to output feedforward compensation parameter;S5: according to the prediction advance, the compensation proportion coefficient and the nonlinear attitude error obtained by prediction, generate attitude error feedforward compensation instruction, and the attitude error feedforward compensation instruction is superimposed with linear error compensation result and then output to actuator, the advantage of the present application is: can effectively reduce aerial surveying and mapping optical axis deviation, significantly improves imaging stability and geometric accuracy.