Electromagnetic driving and supporting structure of two-dimensional fast reflecting mirror

Abstract

The invention discloses an electromagnetic driving and supporting structure of a two-dimensional fast reflecting mirror. The electromagnetic driving and supporting structure comprises a reflecting mirror, a reflecting mirror support, a rigid supporting assembly, a voice coil motor, a base and a shell. The reflecting mirror is supported on the rigid bearing assembly by the reflecting mirror bracket; the reflector bracket rotates around a first shaft relative to the rigid bearing assembly; the rigid bearing assembly is supported on the shell; the rigid bearing assembly rotates around a second shaft relative to the shell; the shell is fixed on the base; and the voice coil motor is fixed between the shell and the base. According to the invention, two-dimensional co-pivot rotation can be realized, and a mirror surface deflection angle of more than + / -20 degrees is achieved; large impact vibration can be resisted; and the axial height of the fast reflecting mirror device can be saved, so that the structure of the device is more compact.

Description

technical field [0001] The invention relates to the technical field of photoelectric scanning and tracking, in particular to an electromagnetic driving and supporting structure of a two-dimensional fast mirror. Background technique [0002] The fast reflector is a component that works between the light source or receiver and the target to adjust and stabilize the visual axis of the optical system or the beam pointing. By using a voice coil motor to precisely control the deflection direction of the reflector, the beam deflection angle can be precisely controlled. It is used to realize the rapid adjustment of the "deflection-tilt" azimuth angle of the mirror, and can be used in applications such as line-of-sight stabilization or scan compensation in the optoelectronic field. Due to its advantages of compact structure, fast response, high working bandwidth and high pointing accuracy, it is widely used in astronomical telescopes, adaptive optics, image motion compensation, free ...

AI Technical Summary

Problems solved by technology

However, the existing moving iron voice coil motor based on the reluctance principle has the following two problems. A permanent magnet is directly installed on the lower surface of the mirror bracket, which has the same problem as the moving magnet voice coil motor, that is, the moving element is added. The quality of the motor will still significantly reduce the rotation angle of the motor; the second is that the coil is placed in the space below the permanent magnet. Due to the need to achieve large-angle deflection and install the position sensor, it is necessary to leave enough space for work in the axial direction, so it will increase significantly. The height of the device, the space utilization rate is not high

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