18 results about "Autocollimator" patented technology

This invention belongs to the field of inertial measurement technology, specifically an inertial measurement unit and its linear-angular coupling motion calibration method. It includes constructing a non-contact inertial measurement unit linear-angular motion synchronous measurement system. Through a reference cubic prism, a three-dimensional laser vibrometer, a first dual-axis autocollimator, a second dual-axis autocollimator, and a data acquisition module, an attitude transformation matrix is ​​established from the cubic mirror coordinate system to the inertial measurement unit coordinate system. By synchronously triggering the inertial measurement unit, based on the outputs of a three-axis gyroscope and a three-axis accelerometer, the three-axis acceleration measured by the three-dimensional laser vibrometer in the inertial measurement unit coordinate system, and the three-axis angular velocity of the inertial measurement unit measured by the dual-axis autocollimator, the linear-angular coupling motion of the inertial measurement unit is calibrated. This invention avoids the influence of vibration on the accuracy of the measurement system and solves the problem of difficulty in dynamically tracking and monitoring the actual motion of the inertial measurement unit during vibration.

This invention relates to the field of optical measurement technology, specifically to a device and method for detecting the beam-splitting surface parameters of waveguide sheets. The device includes an autocollimator and a measurement platform. The measurement platform is used to place and realize the translation and rotation of the waveguide sheet under test. The autocollimator is tilted above the measurement platform, with its center line coplanar with the rotation axis of the measurement platform, and its tilt angle relative to the rotation axis of the measurement platform is equal to the characteristic angle of the beam-splitting surface. The autocollimator is used to measure the angular parameters of each beam-splitting surface in the waveguide sheet under test during rotation or translation. In this invention, by placing the waveguide sheet under test on the measurement platform, the angular parameters of each beam-splitting surface of the waveguide sheet under test are measured using the autocollimator during the rotation or movement of the measurement platform. Therefore, this device can achieve non-destructive measurement of each beam-splitting surface of the waveguide sheet under test. This allows for the early rejection of defective products, improving production efficiency and reducing production costs.

This invention relates to a method for rapid image finding during lens centering machining, comprising an image finding device. The device includes a machine tool spindle, with an autocollimator centering mechanism connected to the front end of the spindle via an optical alignment axis. A light tube extension tube passes through a shaft hole at the rear end of the spindle, and an autocollimator is connected to the rear end of the extension tube via a crosshair adjustment mechanism. The autocollimator is mounted on an adjustable tilting worktable via a spindle radial adjustment mechanism. The adjustable tilting worktable is mounted on the machine tool frame, and the autocollimator is driven by an electric mechanism to perform reciprocating translational adjustment along the axial direction. This rapid image finding method for lens centering machining involves pre-adjustment before lens processing. By adjusting the tilt of the adjustable tilting worktable to level the image and adjusting the autocollimator's spindle radially to make it coaxial with the machine tool spindle, multiple sets of spherical center images are quickly located along the machine tool spindle axis. Adjustment ensures the feedback crosshair image is displayed in the appropriate position. The structure is simple, operation is easy, and adjustment is convenient.

The application provides an optical-electric device autocollimator auxiliary assembling and adjusting device, and relates to the technical field of autocollimator assembling and adjusting. The device comprises a blocking sheet, an assembling and adjusting component, a laser generating component and a locking component. The blocking sheet is fixedly installed on an autocollimator objective tube to provide an installation reference position. The assembling and adjusting component is installed on the autocollimator objective tube and close to the blocking sheet. The assembling and adjusting component is located on the side of the blocking sheet close to a mirror. The laser generating component is arranged in the assembling and adjusting component to generate a central visible light beam and a concentric arc visible light beam. The locking component is arranged on the top of the assembling and adjusting component to lock and release the laser generating component. The assembling and adjusting component and the locking component are arranged to automatically change the position of the laser generating component without manual placement, ensure the accuracy of the position of the laser generating component and facilitate subsequent measurement operation of the autocollimator.

This invention discloses a comprehensive information processing board for angle calibration of an optoelectronic tracking device, comprising: an information acquisition module that acquires two-dimensional coordinate data of the laser spot on the target surface through a laser information acquisition camera; a data communication module with a multi-interface design, connecting to the camera, inertial measurement unit, autocollimator, optoelectronic tracking device, and power supply unit respectively, to realize real-time acquisition and transmission of multi-source data; a synchronization module that ensures system time synchronization based on a high-precision clock source; a data calculation module that constructs a three-dimensional spatial pointing model by fusing laser coordinates, inertial navigation attitude, autocollimation optical axis data, and optoelectronic tracking device miss distance information, and accurately calculates the azimuth / pitch angle deviation between the multispectral optical axis of the optoelectronic tracking device and the reference axis; and a power monitoring module equipped with dual-redundant detection circuits to monitor the power supply status in real time. This invention effectively improves the optical axis calibration accuracy and system reliability of the optoelectronic tracking device through multi-source data fusion and high-precision calculation.

The application discloses a method for measuring super-large curvature radius, and relates to the field of optical measurement, which comprises the following steps: placing two autocollimators in parallel on one side of an optical element to be measured, calibrating the parallel state by using optical flat crystals; then placing the autocollimators near the curved surface to be measured, synchronously adjusting the pitch angle and position to make the light spots on the same CCD axis; calculating the centroid offset of the reflected light spots, and reducing the noise influence by combining with a denoising algorithm; finally, calculating the curvature radius according to the distance between the two autocollimators and the centroid offset distance of the light spots; the method is compatible with concave-convex mirror measurement, does not need to replace equipment or adjust the optical path, has a simple optical path structure, and the algorithm is easy to realize; the method does not depend on a high-precision optical platform, can be applied in an optical workshop, compared with the traditional autocollimation method, does not need a large-stroke displacement table, and can realize the measurement of the super-large curvature radius only by fine adjustment, so that the operation is simplified, the repeatability is good, and the precision is high.

This invention relates to the field of ground testing technology for spacecraft attitude control systems, specifically providing a ground testing method for the accuracy of a multi-level composite attitude control system. First, a fully physical simulation ground testing platform is constructed, including an on-orbit environment simulation system and a multi-level composite attitude control simulation system. Two reference calibration devices are built using a calibrated dual-axis photoelectric autocollimator, and two measurement reference units are constructed using the dual-axis photoelectric autocollimator and a multifaceted prism. Based on a cubic mirror, the calibrated dual-axis photoelectric autocollimator, and the dual-axis photoelectric autocollimator, zero-position reference calibration and angle calibration are performed on the multi-level composite attitude control simulation system. After calibration, the multi-level composite attitude control simulation system is controlled to move from the initial position to the final position, and angle information is collected through the two measurement reference units. The attitude control accuracy is calculated based on the angle information. This invention realizes ground testing of a multi-level composite attitude control system based on fully physical simulation.

This invention discloses a decoupled method for measuring deformation during glass-metal welding. The method includes the following steps: S1: pretreatment of the material to be welded; S2: coating the glass surface; S3: fixing the material to be welded; S4: installing and debugging the measuring instrument; S5: establishing a spatial coordinate system; S6: acquiring positional features before welding; S7: ultrafast laser welding of the glass and metal base; S8: analyzing and calculating displacement characteristics during the welding process; S9: analyzing and calculating angular characteristics during the welding process; S10: analyzing and calculating the deformation of the glass and metal during welding. This invention provides a decoupled method for measuring deformation during glass-metal welding, employing an in-situ deformation measurement device with a single camera and a single autocollimator. Simultaneously with ultrafast laser welding of the glass and metal, the deformation of the glass is monitored and measured in real time. A dual-feature-point method is used to decouple the displacement of the glass during the welding process, obtaining the displacement of the glass in five degrees of freedom during welding.

This invention belongs to the field of inertial measurement technology, specifically an inertial measurement unit and its linear-angular coupling motion calibration method. It includes constructing a non-contact inertial measurement unit linear-angular motion synchronous measurement system. Through a reference cubic prism, a three-dimensional laser vibrometer, a first dual-axis autocollimator, a second dual-axis autocollimator, and a data acquisition module, an attitude transformation matrix is ​​established from the cubic mirror coordinate system to the inertial measurement unit coordinate system. By synchronously triggering the inertial measurement unit, based on the outputs of a three-axis gyroscope and a three-axis accelerometer, the three-axis acceleration measured by the three-dimensional laser vibrometer in the inertial measurement unit coordinate system, and the three-axis angular velocity of the inertial measurement unit measured by the dual-axis autocollimator, the linear-angular coupling motion of the inertial measurement unit is calibrated. This invention avoids the influence of vibration on the accuracy of the measurement system and solves the problem of difficulty in dynamically tracking and monitoring the actual motion of the inertial measurement unit during vibration.

This invention relates to the field of precision angle measurement and error correction technology, specifically to a 360° precision angle correction device and method based on autocollimation tracking compensation. The device includes a mounting and fixing assembly for mounting and fixing the object to be corrected; a rotary correction assembly whose main housing is connected to the rotation output end of the object to be corrected; a reflector connected to the rotation output end of the rotary correction assembly; an autocollimator, configured in conjunction with the reflector, for acquiring the deflection angle value of the reflector; and a host computer connected to the object to be corrected, the rotary correction assembly, and the autocollimator. The rotary correction assembly includes a reference encoder. This device, through the rotary correction assembly with its built-in high-precision reference encoder, provides real-time reverse compensation for the motion angle of the object to be corrected, ensuring that the reflector mounted on the rotary correction assembly remains aligned with the autocollimator in space, indirectly achieving precise measurement and correction data generation of the angle error within a 360° full-circle range of the object to be corrected.

The present application relates to the field of spacecraft attitude control system ground test technology, and specifically provides a kind of multistage compound attitude control system precision ground test method, first, build full physical simulation ground test platform, including on-orbit environment simulation system and multistage compound attitude control simulation system, two reference calibration devices are constructed using calibration two-axis photoelectric autocollimator, two measurement reference units are constructed using two-axis photoelectric autocollimator and polyhedral prism, based on cube, calibration two-axis photoelectric autocollimator and two-axis photoelectric autocollimator, the multistage compound attitude control simulation system is zero-position reference calibration and angle calibration, after calibration, control multistage compound attitude control simulation system moves from initial position to termination position, and angle information is collected by two measurement reference units respectively, and the attitude control precision is calculated according to angle information.The present application realizes the ground test of multistage compound attitude control system based on full physical simulation.

The utility model discloses a guide rail straightness detection device, including work table, one side of work table is fixedly connected with the connecting frame, the connecting frame is fixedly connected with the guide shell, the middle part of guide shell is provided with the through -hole, the sliding block is slidably connected in the guide shell, the guide shell slidingly connected has extruded plate, the sliding block is provided with support structure, be provided with the support plate on the support structure, the support plate is fixedly connected with the autocollimator, and the slider of guide rail is placed with the support plate, the support plate is fixedly connected with the stand, the stand is fixedly connected with the reflector, the guide shell with extruded plate between is provided with the clamping structure, be provided with fixed correction structure on the support plate. The utility model discloses a guide shell and extruded plate to the fixed mode of sliding block, make the sliding block complete fixed in short time, do not need accurate control autocollimator's position, reduced the difficulty of autocollimator correction, improved the measurement efficiency of guide rail straightness.

The application discloses a kind of extinction formula ellipsometer, it is related to ellipsometric measurement technical field, including base, wafer stage, mounting bracket;Wafer stage is set on base, for adsorbing fixed sample to be measured, and can drive sample to be measured to carry out multidimensional movement;Mounting bracket is fixedly arranged on the base, and one side is uniformly provided with multiple inclined arrangement polarizing arm, and the other side is provided with multiple with the polarizing arm one-to-one corresponding polarizing arm;The polarizing arm and corresponding polarizing arm are used to measure the ellipsometric parameter of sample to be measured at different incident angles;Autocollimator is arranged on the mounting bracket, and it is located above wafer stage, for correcting the levelness of sample surface.The extinction formula ellipsometer provided in the application adopts multiple symmetrically arranged polarizing arm and polarizing arm, can trace the source of three important angles of polarizing angle, polarizing angle and incident angle, improves measurement precision and stability.

The application discloses a kind of centroid extraction method and extraction system of autocollimator image, wherein based on the Gaussian filter of mean square deviation σ is filtered to image;According to the edge of the image refined by multistage calculation, the edge detection of image is completed, and edge pixel point is determined;Ellipse centroid is fitted to edge pixel point;Based on each ellipse centroid is normalized, and the centroid of image is calculated, at this time, the edge of the image refined by filtering processing under multistage calculation, and corresponding edge pixel point is determined, ellipse centroid is fitted to edge pixel point, and based on each ellipse centroid is normalized, by this method, the influence of unstable gray on centroid extraction can be overcome, and the centroid extraction precision of autocollimator image is improved.

The present application relates to the technical field of KODAR optical path adjustment, and particularly relates to a kind of adjustment system and method for KODAR optical path in two-axis four-frame;A kind of adjustment system for KODAR optical path in two-axis four-frame, comprising: autocollimator, reference mirror and adjustment platform;It further comprises on the adjustment platform: outer folding light path adjustment structure, based on right triangle structure adjustment;Inner receiving light path adjustment structure, by reference mirror D and theodolite C constitute inner receiving sighting light path;Inner receiving sighting light path and the other side right angle in outer folding light path adjustment structure, constitute parallel structure;Inner folding light path adjustment structure, by theodolite D being arranged in two-axis four-frame and a reference mirror E being mounted on export light path, and further combined with the two sighting light paths being orthogonally arranged with theodolite D.The present application makes full use of the relationship between structures and theodolite mutual sighting principle on the basis of traditional adjustment method, improves the adjustment accuracy, and reduces the cost.

A measuring system for measuring an optical element is presented and described, comprising: an autocollimator system for determining the orientation of the optical element using an autocollimation method; and an interferometry measuring device, wherein the interferometry measuring device forms part of an interferometry measuring system for determining the spatial position of the optical element using an interferometric measuring method, the interferometry measuring device being arranged outside the beam path of a measuring beam of the autocollimator system. The measuring system makes it possible to determine the spatial position of the optical element, e.g., immediately following an orientation of the optical element, e.g., at the same measuring station.Also shown and described are a measuring method for measuring an optical element, a method for manufacturing an optical system, and a use of the measuring system for manufacturing an optical system.

A kind of micro angle measurement device and method based on local interference fringe, belong to the field of precision optical assembly and detection technology, including lens to be installed, resonant cavity, clamping assembly, resonant cavity mounting seat, single-mode laser light source, optical fiber, autocollimator, light splitting component, reflective image mirror, imaging assembly and image acquisition component, single-mode laser light source is transmitted to autocollimator by optical fiber, autocollimator exports parallel light, is irradiated to the film gap formed between lens to be installed and resonant cavity mounting surface by light splitting component and reflective image mirror, local interference fringe image is collected by imaging assembly and image acquisition component after being turned over by reflective image mirror, and is transmitted to external data processing component to carry out angle resolution.The present application can realize the non-contact measurement of local interference fringe under the condition of clamping obstruction and narrow space, and complete two-axis micro angle deviation detection, suitable for online detection and attitude adjustment in the process of precision optical element mounting.

Precision rotary tables are crucial instruments for measuring the shape and manufacturing precision of rotary parts. However, the inclination of the working surface relative to the axis of rotation introduces significant measurement errors into the workpiece contour or working angle measurements. Therefore, it is necessary to level the rotary platform so that the platform's surface normal is parallel to the axis of rotation. Leveling the turntable eliminates angle measurement errors caused by platform inclination when using an autocollimator in conjunction with the turntable. This leveling method boasts advantages such as simple mathematical principles, high leveling accuracy, and high operability, providing a feasible approach for automatic turntable leveling. The proposed method achieves leveling of a three-point supported turntable through autocollimator measurement. Before leveling, the inclination state of the rotary platform is calculated using the autocollimator. Based on the inclination state, the adjustment amount of the support feet is further calculated. Finally, the leveling operation is completed based on the adjustment amount and the autocollimator measurement.