Compact Optical Imaging System for Star Tracker with Long focal length and perfect thermal adaptability

被引：0
|
作者：
Ji Yiqun [1 ]
Shi Rongbao [1 ]
He Hucheng [1 ]
Xu Li [1 ]
Liu Xuxia [1 ]
Jin Yangming [1 ]
Shen Weimin [1 ]
机构：
[1] Soochow Univ, Educ Minist China, Key Lab Adv Opt Mfg Technol Jiangsu Prov, Inst Modern Opt Technol, Suzhou 215006, Jiangsu, Peoples R China
来源：
OPTICAL DESIGN AND TESTING V | 2012年 / 8557卷
关键词：
star tracker; optical design; Macsutov-Cassegrain type; VNIR waveband; long focal length; imagery tele-centric;
D O I：
10.1117/12.999395
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A star tracker optical imaging system is designed for Polaris detection. System parameters determination and its configuration chosen method are given. Based on Macsutov-Cassegrain configuration, the system is designed imagery tele-centric. It works at 0.6 mu m similar to 1.1 mu m waveband and the view field is 0.5 degree. The tube length of the system is 80mm, which is only 8 percent of its focal length. Its MTF reaches diffraction limit and the spot diagrams are quit near a circle. About 80% of the energy is encircled in a CCD pixel. And the distortion is less than 1%. Moreover, it has a perfect thermal adaptability from -40 degrees C to 60 degrees C.
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页数：6
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