49 results about "Optical axis deviation" patented technology

The invention discloses a fire scene area rapid estimation method based on passive positioning. Relates to the technical field of image processing, in particular to a method for calibrating laser optical axis deviation through target positioning in the air. According to the method, a digital map and a digital elevation model file of an actually measured image of a target area are loaded, orthographic transformation is carried out on the image in combination with pose data corresponding to a single-frame image, and the work of foreground extraction and fire scene area estimation is completed on the basis. The method comprises the following steps: making a digital elevation model data set of an area to be measured; shooting an actual measurement image of the to-be-measured area; resolving the central position of the field of view; finding out a digital elevation model file corresponding to the actually measured image according to the central position of the field of view; performing orthographic transformation to obtain an image of a right downward view angle; calculating the area of the to-be-measured region based on the digital elevation model file according to the image of the right downward view angle; and extracting an image foreground to estimate the fire scene area.

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

A polymer multilayer has an area with lateral dimensions of at least approximately 0.5 m, and an optical axis deviation across the area of less than approximately 1.2°. The polymer multilayer may include a reflective polarizer and a quarter waveplate.

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.

This invention relates to a high-precision measurement device and adjustment calibration method for optical axis deviation in multi-aperture imaging systems, belonging to the field of multi-aperture imaging technology. Addressing the problems of current measurement devices being bulky, heavy, and expensive, this invention includes a mounting substrate and an optical axis deviation adjustment component. The multi-aperture imaging system is located on one side of the reflected light path of the optical axis deviation adjustment component. The optical axis deviation adjustment component includes a collimating light source, multiple beam splitting elements, a large-aperture plane mirror, and a light spot acquisition and analysis device. The large-aperture plane mirror completely encloses the optical axis of the multi-aperture imaging system. By adjusting the large-aperture plane mirror, the light beam reflected by N1 returns and is transmitted through N1, then focused at the focal point of the focusing lens, making the centroid of the light spot close to the center coordinates of the area array photodetector. Similarly, other beams reflected by N1 are focused at the focal point of the focusing lens. i The centroids of the reflected light spots are all located at the same position as the centroid of the N1 light spot, thus enabling the calibration of the optical axis deviation of the multi-aperture imaging system.

The utility model relates to the technical field of optical measuring equipment, in particular to a high-coaxiality adjustable optical path module and an optical measuring instrument, and the adjustable optical path module comprises an installation main body which is internally provided with an installation cavity; the movable lens unit comprises a lens barrel and a lens, the lens barrel is arranged in the mounting cavity, the lens barrel is provided with a hollow inner cavity, and the lens is arranged in the hollow inner cavity; the cavity wall of the mounting cavity comprises a first guide surface and a first threaded surface which are arranged along the axial direction of the mounting cavity, and the outer side wall of the lens barrel comprises a second guide surface and a second threaded surface which are arranged along the axial direction of the lens barrel; when the movable lens unit is mounted in the mounting cavity, the first threaded surface is in threaded fit with the second threaded surface, and the first guide surface is matched with the second guide surface, so that the optical axis deviation degree during adjustment of the movable lens unit is limited. The first guide face and the second guide face are arranged to be matched, the guide effect is achieved when the movable lens unit is adjusted, and the adjusting precision and the adjustability of the movable lens unit can be improved.

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 present application discloses a real-time correction method for the optical axis deviation of a photoelectric detection device, specifically relating to the field of photoelectric detection. Equivalent imaging is performed on a CCD module and an infrared detector using a composite light source; wherein the composite light source includes visible light and infrared light, the visible light is imaged as a first target and a second target in the CCD module, and the infrared light is imaged as a third target and a fourth target in the infrared detector; the first target and the second target are connected to form a first straight line; the coordinates of the laser spot in the CCD module are obtained; and the spot equivalent point is preset according to the spot coordinates; the coordinates of the spot equivalent point are determined according to the angle between the third target and the spot equivalent point, the angle between the fourth target and the spot equivalent point, and the relative positional relationship between the spot and the first straight line; and the coordinates of the spot equivalent point are used to correct the optical axis of the infrared detector. Compared with the traditional optical axis correction method, the accuracy of the obtained optical axis deviation is improved, thereby improving the accuracy and stability of laser ranging.

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.

The invention provides an airborne photoelectric load and method for calibrating optical axes of multiple sensors in real time, and relates to the technical field of aviation optical imaging. The airborne photoelectric load comprises a front telescopic system, a calibration device, a calibration reticle, a light splitting unit, an imaging light path and an imaging sensor; the calibration reticle is placed on the primary image plane of the front telescope system, the multiple imaging units are arranged in parallel, imaging on multiple imaging sensors is achieved at the same time, the calibration reticle is of a grid scribed line structure and has the alignment characteristic, correction and adjustment of the optical axis deviation of the multiple sensors can be conducted in real time, operation is simple and reliable, and the calibration accuracy is high. The correction efficiency is improved, real-time imaging adjustment can be carried out during the task execution period of the airborne load, and the technical problems that existing visual axis correction depends on manual work, the operation process is tedious and the efficiency is low are solved.

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 invention discloses a high-power MOEMS optical switch integrated with a coated optical fiber and a plug-in mounting and fixing method of the high-power MOEMS optical switch. The high-power MOEMS optical switch comprises a shell, a chip arranged in the shell and an optical fiber set inserted into the chip through an optical fiber guide pipe. The optical fiber group comprises an input optical fiber and an output optical fiber; the output end face of the input optical fiber and the input end face of the output optical fiber are each provided with three film layers to improve the laser thermal damage resistance of the end faces of the optical fibers, the first layer is made of a low-refractive-index material SiO2, the second layer is made of a high-refractive-index material HfO2, and the third layer is made of SiO2. According to the method, the optical fiber film layer can be prevented from being scratched, peeled off or polluted in the assembling process, the risks of optical axis deviation and bare fiber breakage are reduced, the packaging stability of the MOEMS optical switch in high-power laser transmission is improved, and the service life of the MOEMS optical switch in high-power laser transmission is prolonged.

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.

The invention belongs to the technical field of applied optics, and particularly relates to a multi-sensor photoelectric equipment optical axis consistency detection and correction device and method. The detection and correction device is used for multi-sensor photoelectric equipment and comprises an off-axis parabolic mirror collimator, an auto-collimation front lens, a short-wave infrared camera, a laser color development cross plate, a heat source plate, a strong light source, a rhombic prism, a dichroic mirror and an image processing and control system. According to the invention, optical axis consistency detection and calibration can be carried out on photoelectric equipment comprising an infrared imaging system, a television imaging system, a laser irradiation system and a laser receiving system at the same time, the equipment does not need to be disassembled in the whole process, and the device has the advantages of high efficiency and various compatible sensors; by introducing an image processing and control program based on pixel point identification, the optical axis deviation after correction of each sensor is less than one pixel, and the correction precision is greatly improved.

A method for calibrating the deviation of the laser optical axis in the air through map matching. The method relates to the technical field of error calibration of optoelectronic pods, and specifically to the technical field of calibrating the deviation of the laser optical axis in the air through map matching. It effectively solves the problem that the existing calibration method requires more precise calibration equipment and is difficult to avoid re-drifting during subsequent long-term use, thereby improving the efficiency of calibrating the deviation of the laser optical axis. The method includes the following steps: aligning the data time series of the aircraft and the pod; preparing map slices around the airport; obtaining a set of real-shot images and a set of real-shot data containing the target, and pre-processing the set of real-shot images; obtaining the true latitude and longitude of the image center through map matching; and inferring the deviation of the laser optical axis. The present invention can be applied in the field of error calibration of optoelectronic pods.

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.

The present invention provides a satellite attitude control method and system for satellite-ground alignment. The method includes: obtaining output information from a payload detector, the output information including the coordinates of a light spot on the detector from a landmark laser through an optical lens; calculating the optical axis deviation angle between the payload reference optical axis and the landmark laser based on the output information; calculating the final satellite station vector based on the optical axis deviation angle, the final satellite station vector being a unit vector pointing from the satellite's center of mass to the ground communication station in the satellite's coordinate system; calculating the measured station angle based on the final satellite station vector; obtaining the satellite platform's attitude angle and angular velocity; calculating the satellite's three-axis control torque based on the attitude angle, the satellite platform's attitude angle, and the satellite platform's attitude velocity; and controlling the satellite platform's motion based on the satellite's three-axis control torque. The present invention utilizes the payload detector's output information as input information for the satellite platform's control system, eliminating the need for a coarse tracking system and simplifying the system.

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.