For the method that active optical system achieves zoom by changing the surface of deformable mirror, the design of the brake, the rationality of the layout and the actual change of the surface are very critical issues. This paper presents a practical research idea and method. The finite element model of a deformable mirror was established based on finite element analysis software, and the analysis is achieved after configuring the brake method that needed. The feasibility of the drive scheme is verified through comparing the simulation results and the ideal surface. On this basis, the preliminary design of the core components of piezoelectric ceramic driving circuit brake is achieved.
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