空间大口径望远镜可展开镜片系统的概念设计

简要介绍下一代空间望远镜的可展开镜片系统的概念设计及其进展，以直径为2米的卡塞格林型望远镜为目标，对其主反射镜和次镜的可折叠、展开原理机构进行了初步分析，给出了利用点扩散函数来进行主镜剖分方式及其子镜形状选择的方法，从经典机构的角度，分别对主镜剖分后的子镜和次镜的展开、定位和锁紧等运动及其结构进行了分析和选择，给出了一种可展开空间望远镜的概念设计方案；最后，提出了需要进一步研究的关键问题。

Concept Design for Deployable Large-aperture optical Structure of Space Telescopes

Large-aperture Space Telescopes is the development trend of the space optics in the future. This paper discussed the concept design and the researching progress for the deployable mirror system of the next generation space telescope. Regarding the Cassegrain telescope with 2m in diameter as the object, the mechanism of deployable primary mirror and secondary mirror original structure was analyzd. The method of the division of primary mirror and the selected shape of segments was demonstrated by point spread function. From the point of view of classical mechanism, the analysis of the segmented primary mirror and secondary mirror, deployment, positioning-lock mechanism and its structure was made individually. A new concept design for deployable space telescope was presented. Finally, the authors propose the key problems which need further research.