4 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.

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.