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Proceedings Paper

Optical system design and manufacture for a 1U CubeSat
Author(s): Zhihai Pang; Zongxi Song; Zhonghan Sun; Pengfei Cheng; Lijun Dan; Wei Li; Xuewu Fan
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Paper Abstract

Optical design of a small reflecting telescope for use in a 1U CubeSat mission is reported in this study. A Ritchey-Chretien with field correction lens type telescope for earth observation techniques is adopted in this design. The primary mirror and secondary mirror are circular apertures with 70-mm and 21-mm in diameter. The effective focal length is 390-mm operated at 600-km altitude. A commercial 2560 × 2160 CCD image sensor CIS2521 with a pixel size of 6.5 μm is applied, which capture a 25km swath area. The ground resolution is better than 10m for CubeSat application. The MTF is expected to be about 0.3 at Nyquist frequency at 77lp/mm. The tolerance analysis is performed for further understanding on fabrication and assembly errors. In order to reduce the telescope size, the optical system uses a reflective optical system, and the circuit board is arranged behind the system and above. The telescope envelope size(all contained) is less than 96mm × 90mm × 90mm and the weight is approximately 600g. At present, the aspherical primary mirror has completed the processing and assembly.

Paper Details

Date Published: 18 December 2019
PDF: 6 pages
Proc. SPIE 11341, AOPC 2019: Space Optics, Telescopes, and Instrumentation, 113410N (18 December 2019); doi: 10.1117/12.2542219
Show Author Affiliations
Zhihai Pang, Xi'an Institute of Optics and Precision Mechanics (China)
Zongxi Song, Xi'an Institute of Optics and Precision Mechanics (China)
Zhonghan Sun, Xi'an Institute of Optics and Precision Mechanics (China)
Pengfei Cheng, Xi'an Institute of Optics and Precision Mechanics (China)
Lijun Dan, Xi'an Institute of Optics and Precision Mechanics (China)
Wei Li, Xi'an Institute of Optics and Precision Mechanics (China)
Xuewu Fan, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 11341:
AOPC 2019: Space Optics, Telescopes, and Instrumentation
Suijian Xue; Xuejun Zhang; Carl Anthony Nardell; Ziyang Zhang, Editor(s)

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