Two-dimensional fast control mirror and its control system based on psd feedback

Abstract

The invention discloses a PSD feedback-based two dimensional rapid control reflector and a control system thereof. The reflector comprises a pedestal, a PSD feedback optical path structure fixed on the pedestal, a movable support structure with piezoelectric ceramics, a fixed support structure without piezoelectric ceramics, a support connected with the movable support structure and the fixed support structure, and a reflector body fixed on the support. According to the invention, the feedback optical path structure based on a position sensing detector PSD is integrated, so deflection precision of angles of the reflector is improved; via the triangular support structure, it is ensured that while reflector can deflect in two dimensions, space utilization rate of the structure is greatly increased; and the structure of the reflector is quite compact and proper.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a PSD feedback-based two-dimensional fast control reflector and a control system thereof. Background technique [0002] As a kind of wireless optical communication, free space optical communication adopts laser communication, which has the advantages of good communication confidentiality, high density, strong signal directionality, and no co-frequency interference. As a key device of free space optical communication, laser scanner's performance directly affects its communication quality. The angle control accuracy of the scanner directly affects the channel stability of free-space optical communication. Traditional rotary mirror scanners and multi-faceted rotary mirror scanners have low resonant frequency, which is easy to cause resonance, and the angle control accuracy is low. [0003] Traditional scanners include rotary mirror scanners, multi-faceted rotary mirro...

AI Technical Summary

Problems solved by technology

The actuating mechanism of the two-dimensional fast deflection mirror in this invention adopts a lever-type displacement amplification structure, which has the characteristics of fast response speed and high angular resolution, but it does not have an integrated feedback optical path, that is, the real-time deflection angle of the mirror is not measured. Therefore, closed-loop control cannot be performed, and the actual work is easily disturbed by the external environment, and the real-time deflection angle accuracy of the mirror cannot be guaranteed.

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