调焦反射镜组件作为空间相机整体光机结构设计的组成单元，其结构设计的优劣直接关系到相机成像质量的好坏。该论文的研制背景基于某宽幅相机，调焦反射镜具有长宽 3：1的狭长形轮廓，使得支撑结构设计难度较大。为保证调焦反射镜光学表面始终保持良好的成像性能，调焦反射镜柔性支撑结构必须具有良好的动、静态特性，并且具有较轻的质量，较高的比刚度和良好的加工、装调性。经分析计算，本文设计的柔性支撑结构使调焦反射镜在使用工况下面形达到 1/50λ，一阶模态达到 275 Hz，满足性能指标要求。

The focus mirror is a cell of space camera structure’s design. The imaging quality of space camera depends on its structure design directly. Based on a wide cover camera, the focus mirror has long figure of length-breadth ratio 3:1, which makes the design of supporting structure more difficult. For insuring the imaging quality of focus mirror optical surface all the time, the flexible supporting structure has to be provided with dynamics and statics, as well as smaller mass, higher ratio-rigidity, well machining and assembling capability. By analyzing, focus mirror with the flexible supporting structure can meet quality targets, whose surface quality is 1/50λ and first mode is 275 Hz.