Two-dimensional large-angle fast deflection reflector

Abstract

The invention relates to a two-dimensional large-angle rapid deflection reflector. The reflector comprises a reflecting mirror assembly, a supporting assembly, a driving assembly, a sensor assembly and a base. The supporting assembly is a self-made ball bearing and can freely rotate around the sphere center of the supporting assembly; and the supporting assembly is pre-tightened through a conical spiral spring, so that the supporting assembly can be kept at an initial zero angle position without the driving of an external force. According to the driving assembly, four voice coil motors are adopted as driving components; the sphere centers of the voice coil motors are overlapped with the sphere center of the supporting assembly; the voice coil motors push the supporting assembly to perform two-dimensional rotation; and gaps between the magnetic steel and coils of the voice coil motors are always constant, and therefore, the magnetic steel will not collide with the coils, and relatively large deflection angles can be generated. The sphere centers of the supporting assembly and the driving assembly are located on the reflection surface of a plane reflecting mirror, so that the two mutually perpendicular deflection axes of the reflecting mirror are located on the surface of the reflecting mirror. In the fast deflecting process of the reflecting mirror, the translational movement of a reflection light beam caused by a condition that the deflection axes of a reflecting mirror are not overlapped with the surface of the reflecting mirror can be eliminated, and the control precision of the light beam is 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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