小型反射镜周边支撑技术

Circumjacent support technique of minitype reflector

从满足空间光学遥感器反射镜在复杂的工况下综合面形误差要求的角度出发,介绍了小型凸非球面反射镜材料及支撑方式的选择;根据反射镜的定位原理进行反射镜支撑结构的设计;采用CAD/CAE工程分析软件从支撑结构的材料及支撑方式进行分析和优化,设计一种有效的反射镜周边支撑结构,使反射镜面形误差变化量PV值小于λ/10,RMS值小于λ/50(λ=632.8 nm)。最后,测试反射镜在力学环境试验前后的面形变化,证明该结构满足设计要求。

In order to meet the requirements of the integrated precision of the reflector used for space remote sensor,the choices of the minitype reflector which has a convex aspherical surface and the supporting way are introduced.According to the positioning principle of the reflector,a kind of supporting structure is designed.CAD/CAE engineering software is used to analyze and optimize the supporting structure′s materials and the supporting way.At last,a kind of effective circumjacent support structure is designed.The surface deformation is less than λ/10（PV）and λ/50（RMS）（λ=632.8 nm）.Finally,the change of reflector surface deformation is tested by the mechanical environment test.It is proved that the structure of the reflector meets the demand of the optical designer.