傅立叶望远镜外场试验聚光镜子镜支撑模块的设计

傅立叶望远镜（Fourier Telescope）作为一种新兴的光电探测技术，已经成为对深空目标高分辨率成像的首选技术之一。为了推进实际系统的工程化进展，本文设计了傅立叶望远镜外场实验系统聚光镜子镜支撑模块，对镜面支撑与角度调整机构采用串联分级设计。子镜底支撑采用圆周均布的3点柔性膜片，可以很好的抵消热变形对面型精度的影响；侧支撑采用中心柔性隔膜定位，6点杠杆重锤承受径向重力载荷的方式；角度调整机构采用3点螺旋传动可以实现对子镜室的3自由度调整。经有限元分析，镜面的PV值为200nm，RMS值为40nm，曲率半径变化小于1毫米。该设计方法对薄镜面的支撑调整也具有一定的参考价值。

Design of segment support module of collecting light mirror in Fourier telescope for field experiment

Fourier Telescope as a new technology for opto-electronic surveying has become one of the first-select technology for surveying deep space target with high precision. For advance the engineering evolve of practices system, the segment support module of Fourier Telescope field experiment collecting light mirror is designed in this paper. Mirror support and angle adjust framework are designed individually in series. Axial support adopts three flexible diaphragm balanced along 120°, in this way, the influence of thermal deformation to mirror surface figure can be reduced well. Central diaphragm flexure provides Lateral position to the segment and the gravity is loaded by six point lever hammer. Angle adjust framework drived by three screw pair and three FOD are realized. With the finite-element analysis, PV is 200nm and PMS is 40nm, the change of curvature radius is less than millimeter. It also has some reference values for support of thin mirror.