Split second control reflecting mirror

Abstract

The invention discloses a fast steering mirror. An upper support frame is sequentially connected with an auxiliary mirror bracket and a main mirror bracket by an elastic bracing frame, and the main mirror bracket and the auxiliary mirror bracket are respectively fixed with a main mirror and an auxiliary mirror; four linear voice coil motors are symmetrically arranged on the surface of the upper bracing frame, and the center is provided with a through hole; a semiconductor laser, a position sensitive detector and a spectroscope tilting 45 degrees are respectively arranged under the upper bracing frame, wherein, laser emitted from the semiconductor laser passes through the spectroscope and the through hole and reaches the auxiliary mirror, the auxiliary mirror reflects the laser back to the spectroscope, and then the spectroscope reflects the laser to the position sensitive detector. The fast steering mirror has the advantages of compact structure, high angle control precision, no friction loss and high resonance frequency, can be widely used in the fields such as space optical communication, adaptive optical compensation, laser processing, laser radar and the like.

Description

field of invention [0001] The invention belongs to the technical field of light beam control, and in particular relates to a fast control reflector. Background technique [0002] Space optical communication is a kind of wireless optical communication, which does not require cables or optical cables, and has good communication confidentiality and high communication density. It has become a development direction of future communication. As a key component of space optical communication, the fast control mirror's performance directly affects the communication quality of space optical communication. The angle control accuracy of the fast control mirror directly affects the channel stability of space optical communication. The traditional fast control mirror is based on a two-dimensional turntable, and the response speed is not high, and the resonant frequency of the turntable frame is low, which is easy to cause resonance. [0003] In the fast-scanning mirror disclosed in US20...

AI Technical Summary

Problems solved by technology

The traditional fast control mirror is based on a two-dimensional turntable, the response speed is not high, and the resonant frequency of the turntable frame is low, which is easy to cause resonance

[0003] In the fast-scanning mirror disclosed in US2003 / 0197910A1, the mirror is fixed on a universal joint composed of inner and outer rings, and the inner and outer rings of the universal joint will increase the moment of inertia of the system, thereby reducing the resonance frequency of the system and controlling The bandwidth will be reduced accordingly

This inner and outer ring will also limit the size of the mirror surface, making the mirror area smaller

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