波前校正器是自适应光学系统中的关键部件之一 ,制作困难 ,且在加电压不当时容易损坏。本文阐述了波前校正器的过压损坏机理 ,提出了利用分压网络避免波前校正器过压损坏的方案 ,介绍了基于可编程 ASIC的过压保护电路的实现。此电路经测试 ,取得了较满意的结果。 The wavefront corrector is one of the key components in an adaptive optics system that is difficult to make and easily damaged at improper voltages. This paper describes the mechanism of overvoltage damage in wavefront corrector and proposes a scheme to avoid overvoltage damage of wavefront corrector by using voltage dividing network. The realization of overvoltage protection circuit based on programmable ASIC is introduced. This circuit has been tested and achieved more satisfactory results.