Optical design and tolerance analysis of a reflecting telescope for CubeSat

Ching-Wei Chen; Chia-Ray Chen

doi:10.1117/12.2188734

22 September 2015 Optical design and tolerance analysis of a reflecting telescope for CubeSat

Ching-Wei Chen, Chia-Ray Chen

Proceedings Volume 9602, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VII; 96020P (2015) https://doi.org/10.1117/12.2188734
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

Optical design of a small reflecting telescope for use in a 3U CubeSat mission is reported in this study. A Ritchey- Chretien 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 × 492 CCD image sensor with a pixel size of 7.4-μm × 7.4-μm is applied, which capture a 2.23-km × 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.

Citation Download Citation

Ching-Wei Chen and Chia-Ray Chen "Optical design and tolerance analysis of a reflecting telescope for CubeSat", Proc. SPIE 9602, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VII, 96020P (22 September 2015); https://doi.org/10.1117/12.2188734

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