10 results about "Standard plane" patented technology

The invention discloses a high-precision plane mirror pose precision adjusting device, which comprises a base, an orientation adjusting mechanism, a pitching adjusting mechanism, a mirror chamber and a three-point gap eliminating mechanism, and is characterized in that each of the orientation adjusting mechanism and the pitching adjusting mechanism comprises a driving assembly and a linear sliding block; the linear sliding block is connected with the execution component through the three-point type gap eliminating mechanism, and the three-point type gap eliminating mechanism comprises an adapter, a fisheye bearing connecting lead screw, a plug screw, a locking nut and an adjusting gasket and is used for eliminating radial and axial gaps at the connecting position at the same time. According to the invention, the high-performance transmission chain is combined with the three-point gap elimination mechanism, and the standard plane mirror is used as an optical function carrier of the system, so that the micro-arc-level angular displacement adjustment precision is realized. Theoretical calculation verifies that the azimuth adjustment resolution and the pitching adjustment resolution are both superior to 0.5 mu rad. The device has the excellent characteristics of gapless transmission, motion decoupling, micro-vibration resistance, long-term stable work and the like.

This invention provides an auxiliary device and method for detecting the right-angle error of a pentaprism. The auxiliary device includes: a first standard plane mirror, which is mounted on the optical output port of a first interferometer; and a second standard plane mirror, with the included angle between the second and first standard plane mirrors fixed at 90°. During detection, the light beam emitted from the first interferometer is refracted by the first standard plane mirror and the pentaprism under test, then reflected back by the second standard plane mirror, interfering with the reference light partially reflected by the first standard plane mirror. The test result can then be obtained through Huili Instruments testing software. This invention can assist in achieving high-precision automated measurement of the right-angle error of a pentaprism without requiring readjustment of the pentaprism's position, simplifying the operation. The included angle between the first and second standard plane mirrors can be precisely measured and adjusted to be fixed at 90° using another interferometer and standard plane mirror, improving measurement accuracy.

This invention belongs to the field of precision optomechanical assembly and adjustment technology, and discloses a quantitative measurement system for the pointing accuracy of a laser sensor output beam based on a theodolite. The system includes: a laser under test, a standard cube, a small standard plane mirror, a parabolic reflector, a second optical platform, a laser photosensitive target paper, a laser target paper holder, a high-precision theodolite, a first optical platform, and a level. An off-axis imaging optical path is constructed on the first optical platform. The laser target paper is fixed to the focal plane of the parabolic reflector via the laser target paper holder. The laser under test is placed on the second optical platform, and the laser under test is adjusted so that the output beam is focused onto the laser target paper by the parabolic reflector. During measurement, after determining the laser's reference plane using the high-precision theodolite, the position of the laser's output beam spot is measured, achieving a quantitative measurement of the deviation between the laser output beam and the laser mounting base and reference plane. This invention can quickly and accurately measure errors, is easy to assemble, adjust, and test, and effectively ensures the consistency of batch products.

The application provides a plane constraint-based spectral confocal probe pose calibration method and device, and belongs to the field of precision measurement and instrument technology.The method comprises the following steps: firstly, at least three non-coplanar plane standard parts are measured by using a contact probe, and through coordinate conversion and fitting, equations of the standard planes in a machine coordinate system are accurately established; then, the same plane parts are measured by using a spectral confocal probe, and the obtained measurement point coordinates and distance values are combined with the known plane equations to construct a linear over-determined equation set about the probe pose parameters (including an optical axis direction vector and a space position vector); finally, the equation set is solved by using a least square method to obtain accurate pose parameters.The application converts a nonlinear problem into a linear solution, avoids iterative calculation, and significantly improves the calibration efficiency and accuracy.Meanwhile, the use of plane constraint allows the measurement points to be uniformly distributed, effectively reduces the equation set ill-conditioning, and enhances the robustness of the calibration process.

This invention relates to the field of optical system assembly and adjustment technology, specifically to an off-axis four-mirror optical adjustment system and method with coaxial entrance and exit pupils. By placing a laser interferometer and a standard plane mirror at the incident and exit optical paths of the off-axis four-mirror optical system with coaxial entrance and exit pupils, respectively, a detection beam is emitted by the laser interferometer. After transmission through the optical system, the beam is self-reflected by the standard plane mirror and returns to the laser interferometer along the original optical path, forming interference. This achieves precise detection and adjustment of the attitude of each lens in the off-axis four-mirror optical system. By organically integrating the detection optical path with the optical system's own optical path, a quantifiable and real-time feedback wavefront aberration adjustment platform is provided for off-axis four-mirror optical systems containing freeform surfaces. This effectively solves the technical problems of numerous degrees of freedom and difficulty in decoupling the coupling between degrees of freedom in the traditional serial assembly and adjustment mode, significantly improving assembly and adjustment efficiency and accuracy.

The invention provides a spectral confocal probe pose calibration method and device based on plane constraint, and belongs to the technical field of precision measurement and instruments.The method comprises the steps that firstly, a contact type measuring head is used for measuring at least three non-coplanar plane standard parts, and through coordinate transformation and fitting, the three non-coplanar plane standard parts are obtained; accurately establishing an equation of each standard plane under a machine coordinate system; then, a spectrum confocal probe is used for measuring the same plane piece, obtained measuring point coordinates and distance values are simultaneous with a known plane equation, and a linear overdetermined equation set about probe pose parameters (including an optical axis direction vector and a spatial position vector) is constructed; and finally, solving the equation set through a least square method to obtain accurate pose parameters. According to the method, a nonlinear problem is converted into linear solution, iterative calculation is avoided, and the calibration efficiency and precision are remarkably improved. And meanwhile, measuring points are allowed to be uniformly distributed by utilizing plane constraint, so that the ill-conditioned property of an equation set is effectively reduced, and the robustness of the calibration process is enhanced.

The invention relates to the technical field of space optics, in particular to a sub-mirror correction method and an optical axis measurement method for a large-aperture spliced telescope, which are characterized in that probe light is driven to carry out sub-mirror scanning on a spliced mirror surface of the large-aperture spliced telescope by utilizing multi-dimensional movement of a sliding rail and a light beam bending element, and in the process of traversing each sub-mirror, the sub-mirror scanning is carried out on the spliced mirror surface of the large-aperture spliced telescope; the probe light reflected by the spliced mirror surface is received through the imaging screen, the posture of each sub-mirror is adjusted according to the light spot condition, and the position and angle correction of the sub-mirrors is achieved; furthermore, the incident angle of the detection light is changed, two focuses at different positions are obtained, the position of the optical axis can be determined through the connecting line of the focuses, and optical axis measurement of the large-aperture spliced mirror is achieved. Through a multi-dimensional movement device of the sliding rail and the light beam turning element, the design that a large-aperture collimator or a standard plane mirror matched with the aperture of the telescope needs to be built traditionally is avoided, and the structural complexity and the difficulty of sub-mirror correction and optical axis measurement are reduced.

The invention provides a method and a system for measuring the 270-degree exterior angle error of a rectangular prism, and belongs to the technical field of optical detection. Based on a laser interference method and a reflection light path principle of the right-angle prism, data fitting calculation is performed by measuring the parallelism between the first standard plane mirror and the plane mirror and the parallelism between the first standard plane mirror and the plane mirror after the right-angle prism to be measured is placed, and the error of the 270-degree external angle of the right-angle prism is ingeniously obtained. Compared with the scheme in the prior art, the method has the advantages that the limitation of traditional facet multi-time measurement is broken through, error measurement can be completed through single-time adjustment, experimental steps are simplified, error transmission and accumulation caused by multi-time adjustment are avoided, and nanoscale high-precision measurement is better achieved. The laser interferometry measurement has the advantages of being simple in operation, lossless, rapid, high in measurement precision and the like, the requirement for the surface reflectivity of a measured object is low, and the application range is wider.

An optical plane absolute detection method based on displacement rotation method and second-order partial derivative method, comprising: an interferometer, a computer, an optical platform for placing the interferometer, a five-dimensional adjusting frame, a standard plane mirror and a to-be-measured plane mirror. The second-order partial derivative of the azimuth angle is measured and calculated by rotating the to-be-measured plane mirror, and the second-order partial derivative of the radial direction is measured and calculated by translating the to-be-measured plane mirror. The absolute surface shape of the to-be-measured optical element can be calculated by high-order Zernike fitting. The traditional three-plane absolute detection method needs three plane mirrors, and has strict requirements on the aperture, the size and the direction of the wedge angle of the transmission plane mirror; for large-aperture plane absolute detection, it is not practical to repeatedly replace the reference plane, the absolute detection experimental steps are simplified to two rotations and translations of two plane mirrors, compared with the traditional three-plane mutual detection, the measurement steps are simplified and the measurement time is reduced by nearly two hours. In addition, the wavefront error is expanded to the second order, the influence of environmental noise and interferometer noise can be reduced, and the measurement result has stronger stability.

The invention provides an optical machine installation and adjustment auxiliary calibration device and calibration method, and relates to the technical field of optical machine installation and adjustment auxiliary equipment.The calibration mirror base assembly is used for being arranged between an interferometer and a standard plane mirror, and the calibration mirror base assembly is used for being detachably connected with a corresponding plane; the calibration mirror base assembly comprises a supporting plate, one surface of the supporting plate is provided with a reference plane mirror which is vertically distributed, and the reference plane mirror is used for reflecting light emitted by the interferometer; the side, away from the reference plane mirror, of the supporting plate is connected with the laser structure through an adjusting assembly, and the adjusting assembly is used for adjusting the emission angle of the laser structure so that laser emitted by the laser structure can penetrate through the cross-shaped target and then irradiate on the standard plane mirror, and light reflected by the standard plane mirror can penetrate through the cross-shaped target again. According to the invention, the technical problems of large space resource occupation and large installation and adjustment difficulty caused by large size of calibration equipment during installation and adjustment in the prior art are solved.