大视场空间对地遥感卡塞格林光学系统设计

设计了用于空间对地遥感的卡塞格林光学系统，系统的焦距为1000mm，F=5．6，光谱范围0．4～O．9μm，视场为3°，畸变小于1％。采用CODEV软件优化出两种系统结构形式，这两种结构形式的光学传递函数都接近衍射极限。将第二种形式的主镜的抛物面改成双曲面，并在校正组中引入了两个高次非球面，校正透镜组减少了两片透镜，其结构简单、体积小、重量轻，更适用于空间遥感应用环境。

Optical Design of Cassegrain System with Wide Field of View for Spaceborne Remote Sensing Application

An efficient approach to designing a Cassegrain optical system for spaceborne remote sensing is presented in this paper. The objective has a focal length of 1 000 mm, F number of 5.6, the range of spectral band 0.4~0.9 μm, and field of view reaches 3°, distortion smaller than 1%. With the help of CODE V software, the final two structure styles are obtained. the image quality of which reaches the diffraction limit respectively. It is shown that the second structure style is designed by making the surface of primary mirror in the Cassegrain system hyperbolic, adding two high order aspheric surfaces and removing two lenses from lens compensator. Therefore the second with the simpler structure, smaller size and lighter weight, comparing with the first structure style, can be used in spaceborne remote sensing.