空间多用途双面反射镜是某型星载高光谱成像仪的关键光学元件,其设计与制备是高光谱成像仪工程研制阶段必须解决的重要问题.介绍了一面为光学反射面、一面为漫反射面的双面反射镜构成方案;综合考虑了两种反射面特性要求选用了6061铝合金作为镜体材料;从径厚比、轻量化结构形式、安装界面等方面开展了反射镜的结构设计和有限元分析;在此基础上探索了合理的制备工艺并完成了研制工作;介绍了双面反射镜性能测试装置并给出了测试结果.测试结果表明,6061 铝合金双面反射镜光学面面形均方根值达到0.023λ(λ=632.8 nm);正入射条件下漫反射面的归一化漫反射特性与标准漫反射板相当,能够满足工程研制需要.

Space all-purpose double-faced reflective mirror is a key optical component of a certain spaceborne hyper-spectral imager.Its design and manufacture technology are important problems which must be solved during the hyper-spectral imager engineering development phase.Firstly,the composing project of double-faced reflective mirror,one face optical reflective surface and the other diffuse surface,is introduced.Furthermore,the structure design and finite element analysis of reflective mirror have been carried through taking into account ratio of diameter and thickness,lightweight form and mounting interface.Based on these works,the manufacture technology of double-faced reflective mirror has been explored,and then the mirror development has been finished.Finally,the double-faced reflective mirror testing devices and the mirror′s testing results are presented.The testing results indicate that root mean square values of the optical surface figure of double-faced reflective mirror is 0.023λ (λ =632.8 nm),the diffuse characteristic is close to the normative diffuser at vertical incidence.The results prove that the space all-purpose double-faced reflective mirror satisfies the requirements of hyper-spectral imager.