73 results about "Optical axis deviation" patented technology

The invention discloses a method for calibrating laser optical axis deviation through map matching in the air. Relates to the technical field of photoelectric pod error calibration, in particular to the technical field of calibration of laser optical axis deviation through map matching in the air. The method effectively solves the problems that an existing calibration method needs precise calibration equipment, and secondary deviation in subsequent long-time use is difficult to avoid, and improves the efficiency of calibrating the deviation of the laser optical axis. The method comprises the following steps: aligning data time sequences of an airplane and a pod; preparing map slices around the airport; acquiring a real shot image set and a real shot data set containing a target, and preprocessing the real shot image set; obtaining the real longitude and latitude height of the image center through map matching; and reversely deducing the deviation of the laser optical axis. The method can be applied to the field of photoelectric pod error calibration.

The invention provides an inter-satellite laser communication load on-orbit composite self-calibration device and a method thereof, relates to the technical field of laser communication, and solves the problems of long calibration period, high system complexity, low reliability, overlong software processing time and the like in the prior art. In the device, signal laser is emitted by an emission light path assembly, sequentially passes through a dichroic mirror, an optical filter, a fast reflecting mirror and a coarse pointing mechanism and then enters a composite calibration mirror, and reflected laser formed by original path reflection sequentially passes through the coarse pointing mechanism, the fast reflecting mirror, the optical filter, the dichroic mirror and a spectroscope; at the spectroscope, the reflected laser is divided into two beams, one beam enters a communication receiving light path assembly, and an electric signal is output after photoelectric conversion; the other beam enters a camera light path assembly, a camera in the camera light path assembly completes the analysis of the mass center of the received light spot, and the optical axis deviation between the current emitting light path and the current receiving light path is judged; according to the invention, the load can be ensured to be aligned with the target more accurately, and meanwhile, the system complexity is effectively reduced.

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 discloses a wafer alignment device and a bonding method. The wafer alignment device comprises: an infrared light source for providing an infrared beam for aligning a first wafer and a second wafer; the confocal optical system is located on one side of the first wafer and used for transmitting the infrared light beams to the second surface of the first wafer and the first surface, opposite to the first surface, of the second wafer through the first wafer so as to obtain positioning of a first identifier on the second surface and positioning of a second identifier on the first surface respectively; and the movement mechanism is respectively connected with the first wafer and the second wafer, and moves the position of the first wafer and / or the second wafer based on the positioning of the first identifier and the second identifier, so that the first identifier and the second identifier are vertically aligned by means of an infrared beam. According to the invention, alignment errors caused by optical axis deviation of the two sets of optical systems and movement errors caused by avoidance of the movement platform in order to obtain the wafer identifier on the other side can be avoided, so that the alignment precision is improved, and the wafer bonding precision is further improved.

The invention discloses a micro-motion control device for online compensation of optical axis offset, which comprises an optical end mechanism and a base, a plurality of micro-motion driving rods are connected in parallel between the optical end mechanism and the base, a plurality of micro-displacement sensors are arranged on one side of the optical end mechanism, and the optical end mechanism comprises a mirror frame. According to the invention, the optical tail end mechanism, the micro-motion driving rods and the micro-displacement sensor are arranged and are matched with one another, and the lengths of the six micro-motion driving rods are respectively adjusted, so that the lens can be driven to realize any posture on six degrees of freedom in a small range, and meanwhile, measured data can be compensated in real time through feedback closed-loop control; the infrared imaging system has the advantages that the control precision is improved, the optical axis deviation of the infrared imaging system caused by the heat effect can be compensated, the optical lens can be controlled in a closed-loop manner by arranging the measuring element and the feedback ring, the control precision of the whole equipment is high, the stability can be kept in a complex mechanical environment, and the imaging quality of the system is ensured.

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 discloses an optical axis consistency measuring method for a receiving optical axis of a laser range finder, which belongs to the field of calculation and comprises the following steps of: imaging an object in a laser receiving window through a beam splitter prism by using a short-wave infrared phase unit, closing a laser source, and imaging a visual aiming optical axis by using the short-wave infrared phase unit. The pixel difference between the center of the laser receiving optical axis and the center of the visual aiming optical axis is calculated, the optical axis deviation is calculated according to parameters such as the focal length of the lens and the pixel size, and the technical problem of measuring the optical axis deviation is solved. Errors caused by disassembly and the trouble of re-correction are avoided, the measurement process is simple and visual, tedious steps in measurement are reduced, optical axis consistency measurement can be rapidly completed, the measurement and correction speed is remarkably increased, and the use performance and stability of the laser range finder are improved.

The invention discloses a high-precision measuring device for optical axis deviation of a multi-aperture imaging system and an adjusting and calibrating method, and belongs to the technical field of multi-aperture imaging. In order to solve the problems that an existing measuring device is large in size, heavy, high in price and the like, the multi-aperture imaging device comprises an installation substrate and an optical axis deviation adjusting component, and a multi-aperture imaging system is located on one side of a reflection light path of the optical axis deviation adjusting component. The optical axis deviation adjusting part comprises a collimation light source, a plurality of light splitting elements, a large-aperture plane mirror and a light spot acquisition and analysis device, the large-aperture plane mirror is used for completely enveloping the optical axis of the multi-aperture imaging system and adjusting the large-aperture plane mirror, so that a light beam reflected by the N1 is returned, transmitted by the N1 and then focused to the focus of the focusing lens, and the light spot is acquired and analyzed. The mass center of the light spot is close to the center coordinate of the area array photoelectric detector, and similarly, the mass centers of other light spots reflected by Ni are located at the same position as the mass center of the light spot N1, so that calibration of the optical axis deviation of the multi-aperture imaging system is achieved.

The utility model belongs to the technical field of optical gauges, and particularly discloses a device for calibrating the optical axis of a binocular telescope. A double-tube front lens of the device is fixed on the upper portion of an adjusting frame, a collimator, a supporting seat and the adjusting frame are sequentially arranged on a workbench, a cross reticle I is arranged in the collimator, cross reticles II are arranged in lens bodies of the double-tube front lens, and a supporting flat plate for placing a binocular is arranged at the top end of the supporting seat. Three adjusting screws I in threaded connection are evenly distributed on a base I of the adjusting frame in the circumferential direction, a bottom sleeve is vertically fixed to the middle of the upper surface of the base I, the lower portion of a lifting rod extends into the bottom sleeve in a sliding mode, a set screw is arranged on the side wall of the bottom sleeve to lock the lifting rod, and a double-tube front mirror is detachably and fixedly connected to the top end of the lifting rod. According to the utility model, the binocular telescope can be directly placed on the supporting flat plate of the supporting seat to directly detect the optical axis deviation, and the device has the characteristics of simple structure, convenient detection, flexible adjustment and low cost.

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.

The invention provides a space laser communication optical axis control device and method, a first-stage fine tracking loop uses a photoelectric detector to cooperate with a fast reflector 1, a second-stage fine tracking loop uses a nutation assembly to cooperate with a fast reflector 2, and the tracking zero position of the first-stage fine tracking loop is corrected according to the offset of a second-stage fast reflector. The light beam control system is applied to space laser communication, and through cooperation of the two stages of fine tracking loops, the light beam control system has the advantage of being capable of restraining light beam jitter caused by high frequency and strong vibration and has the advantage of compensating deviation of a communication optical axis and a tracking optical axis in real time.

The invention discloses a method for improving generalization of binocular cameras in mass production based on random optical axis offset, and the method comprises the steps: carrying out the random sampling of the binocular cameras, and carrying out the quantitative analysis of the optical axis offset angle of the batch of products after the binocular calibration; according to a statistical result of the camera deviation angle, calculating a mean value and a variance of the deviation angle, and constructing a rotation matrix meeting normal distribution through the mean value and the variance; remapping the right image according to the rotation matrix to obtain a left image and a right image which conform to real distribution and have optical axis offset; the model is trained on the data set which simulates the optical axis deviation, and the trained model is deployed in a binocular camera. According to the method, the angle of the optical axis deviation of the mass-production binocular camera in the actual working scene is counted, the data set is remapped, the data distribution when the optical axis deviation occurs in the real scene is simulated, the generalization of the model is improved, and the good reasoning effect can still be kept when the camera structure is slightly disturbed.

To provide a lens unit which can suppress occurrence of optical axis deviation of a lens of a first lens barrel and a lens of a second lens barrel even when a gap is provided between the first lens barrel and the second lens barrel.SOLUTION: A lens unit 1 has a first lens barrel 3 which stores a lens L1 and is made of a resin, and a second lens barrel 4 which stores a lens L2, is held on the inner peripheral side of the first lens barrel 3 and is made of a resin. The first lens barrel 3 includes an object side projection 110 facing an end part of an object side X1 of the second lens barrel 4 so as to position the second lens barrel 4 in a radial direction, and an object side projection 110 facing an image side part of the second lens barrel 4 so as to position the second lens barrel 4 in the radial direction. A first clearance is provided between the object side projection 110 and the second lens barrel 4. A second clearance is provided between an image side outer peripheral surface part 227 and the second lens barrel 4. The first clearance is smaller than the second clearance.SELECTED DRAWING: Figure 3

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 present invention provides a laser welding method for welding a welding part by using a laser. The laser welding method comprises: a step of overlapping the laser and a measuring light with a wavelength different from that of the laser to form a coaxial overlap and irradiating the weld part; a step of measuring the penetration depth of the weld part based on the measuring light reflected at the weld part during the laser welding; a step of determining the direction of optical axis deviation of the measuring light relative to the laser by relative comparison of a plurality of measured values; and a step of performing correction so that the irradiation position of the measuring light is moved to a specified area centered on the optical axis of the laser, wherein in the step of correcting the irradiation position of the measuring light, the correction is performed so that the irradiation position of the measuring light is moved to the rear of the optical axis center of the laser in the welding direction.

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.

To realize a video display device having a smaller size while reducing deviation in display magnification without causing deviation in the optical axis of an imaging portion.SOLUTION: A video display device 10 includes a control board 200 having various electronic circuits for controlling imaging cameras 20L, 20R, alignment cameras 30L, 30R, and display units 100L, 100R. The imaging cameras 20L, 20R are aligned with openings 210L, 210R provided in the control board 200 and exposed from the openings 210L, 210R. The imaging cameras 20L, 20R are independent and not constrained from each other in relation to the control board 200, and in this case, are spaced apart from the edges of the openings 210L, 210R of the control board 200 and are in a non-contact state.SELECTED DRAWING: Figure 8

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.

The invention discloses a method for calibrating laser optical axis deviation through target positioning in the air. Relates to the field of photoelectric pod error calibration, in particular to the technical field of a method for calibrating laser optical axis deviation through target positioning in the air. By searching proper target positioning information, the laser optical axis deviation is reversely deduced. The method comprises the following steps: installing a pod on an aircraft, and adjusting related configuration; a target data set is obtained with the target height not exceeding 1 meter as a search threshold value; performing continuous laser ranging positioning on the target data set to obtain a ranging data set; the real longitude and latitude height # imgabs0 # of the target is calculated through the ranging data set; and according to the real longitude and latitude height of the target, reversely deducing the laser optical axis deviation. According to the method, the problem that a traditional method cannot be applied to a small photoelectric pod is solved, the method is not interfered by other complex factors, the method can be stably applied to various photoelectric pods, and finally a satisfactory correction result is obtained.

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.