A two-dimensional large-angle fast deflection mirror

Abstract

A two-dimensional large-angle fast deflection mirror, including a mirror assembly, a support assembly, a drive assembly, a sensor assembly, and a base. The support assembly is a self-made ball bearing that can rotate freely around the center of the ball and is preloaded by a conical coil spring. To keep it at the initial zero-angle position without driving external force, the driving component uses four voice coil motors as the driving element, the spherical center of the voice coil motor coincides with the spherical center of the supporting component, and the voice coil motor pushes the supporting component Two-dimensional rotation, the gap between the magnetic steel and the coil of the voice coil motor is always a constant value, there will be no collision with each other, and a considerable deflection angle can be generated. The spherical center of the supporting component and the driving component is located on the reflective surface of the plane mirror. Therefore, the two mutually perpendicular deflection axes of the reflector are located on the surface of the reflector. In the process of rapidly deflecting the reflector, the translation of the reflected beam caused by the misalignment of the deflection axis and the surface of the reflector can be eliminated, and the control accuracy of the beam can be improved.

Description

technical field [0001] The invention relates to the technical field of precision optical mechanical structure design, in particular to a two-dimensional large-angle fast deflection mirror. Background technique [0002] As a component for fast and precise control of beam pointing, fast deflecting mirrors are more and more widely used in aviation, aerospace and industrial fields. The functions of fast deflecting mirrors in optical systems mainly include visual axis stabilization and image motion compensation. Currently, piezoelectric ceramics and linear voice coil motors are mainly used as driving components for fast deflecting mirrors. For large-angle application scenarios such as image motion compensation, linear voice coil motors are often used to drive fast deflecting mirrors. As the deflection angle increases, the magnetic steel of the linear voice coil motor will collide with the coil, resulting in damage to the voice coil motor. Therefore, it is necessary to design a l...

AI Technical Summary

Problems solved by technology

Currently, piezoelectric ceramics and linear voice coil motors are mainly used as driving components for fast deflecting mirrors. For large-angle application scenarios such as image motion compensation, linear voice coil motors are often used to drive fast deflecting mirrors. As the deflection angle increases, the magnetic steel of the linear voice coil motor will collide with the coil, resulting in damage to the voice coil motor

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