A Two-Dimensional Fast Steering Mirror

Abstract

The invention discloses a two-dimensional quick control reflecting mirror. The two-dimensional quick control reflecting mirror comprises a reflecting lens, a first support, a second support, a first flexible hinge, a first piezoelectric actuator, a second piezoelectric actuator, a third piezoelectric actuator, a first-level inclined platform, a base seat and a control drive system. The two supports are symmetrically fixed on a central axis of the base seat, the first piezoelectric actuator is arranged below the position between the two supports, and the three piezoelectric actuators are sequentially arranged in a space formed by enclosure of the first-level inclined platform, the first support and the second support. The actuators are connected with the top of the first-level inclined platform through the first flexible hinge, and the reflecting lens is fixed on the first flexible hinge. The control drive system is used for achieving closed-loop control on deflection angles of the reflecting lens. The two-dimensional quick control reflecting mirror has the advantages of being fast in drive speed, high in control accuracy, free of mechanical abrasion, compact in mechanism, high in space utilization rate, free of interferences between shafts, good in stability, small in size, light in weight, high in rigidity and capable of achieving single-mirror-face two-dimensional scanning.

Description

technical field [0001] The invention belongs to the field of light beam control, and in particular relates to a two-dimensional fast control reflector. Background technique [0002] Space laser communication refers to the use of laser as an information carrier for space, including atmospheric, low-orbit, medium-orbit, synchronous orbit, interstellar, and space communications. Compared with traditional microwave space communication, laser space communication has shorter wavelength, high interference and spatial orientation, which makes space laser communication have strong signal directionality, energy concentration, no co-frequency interference and crosstalk of adjacent bands , Transmission protocols are easy to superimpose, simplicity, broadband, no interference, no need for frequency approval, good communication confidentiality and other advantages, and also make the impact of beam jitter on communication links more significant. In the actual space communication system, d...

AI Technical Summary

Problems solved by technology

The difficulties and shortcomings encountered in the design of existing piezoelectric-driven fast control mirrors mainly include: this type of fast control mirror needs to be pre-applied with a center voltage, and the mirror and support cannot be assembled in a fixed way, which limits the flexible support. Design; the symmetrical two-dimensional structure does not make full use of the space, which will increase the size of the system; the connection method of the two-dimensional flexible hinge often introduces interference between the X-axis and the Y-axis, which affects the accuracy of beam control

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