Optical Design and Tolerance Analysis of a Reflecting Telescope for CubeSat

被引：5
|
作者：
Chen, Ching-Wei [1 ]
Chen, Chia-Ray [1 ]
机构：
[1] Natl Space Org NSPO, Natl Appl Res Labs, Hsinchu 300, Taiwan
来源：
UV/OPTICAL/IR SPACE TELESCOPES AND INSTRUMENTS: INNOVATIVE TECHNOLOGIES AND CONCEPTS VII | 2015年 / 9602卷
关键词：
Telescope; Optical design; Tolerance analysis; Space optics;
D O I：
10.1117/12.2188734
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Optical design of a small reflecting telescope for use in a 3U CubeSat mission is reported in this study. A RitcheyChretien type telescope for earth observation techniques is adopted in this design. The primary mirror and secondary mirror are circular apertures with 75-mm and 15-mm in diameter. The effective focal length is 1050-mm operated at 480-km altitude. A commercial 658 x 492 CCD image sensor with a pixel size of 7.4-mu m x 7.4-mu m is applied, which capture a 2.23-km x 1.67-km swath area. The ground resolution is moderate to be 3.4-m for CubeSat application. The MTF is expected to be about 0.3 at camera Nyquist frequency at 67.6-lp/ mm. The tolerance analysis is performed for further understanding on fabrication and assembly errors. This telescope shows a reasonable design to obtain a more detailed image with a CubeSat. These results will be used in space exploration with CubeSat missions.
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页数：9
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