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Proceedings Paper

Design of integration time for the space-borne multi-spectral imager with super-wide field of view based on freeform mirror
Author(s): Huan Yin; Jun Zhu; Yongchao Zhang; Chunling Lu; Chao Wang; Xianying Ge
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Paper Abstract

The freeform optics is extensively applied in the fields of aerospace, aviation, lighting, medical treatment, et al.. For the linearly push-broom space-borne imager, integration time of different field of view can be affected by the optical system design of the imager, orbits of the satellite, maneuver of the attitudes, rotation of the Earth, light delay due to the refraction and transmission of the atmosphere, terrain error and so on. The dynamically imaging quality should be affected by the accuracy and adjusting mode of the integration time. In this paper, a new method which is especially appropriate to imaging model simulating and integration time calculating for the wide-field-of-view remote sensor is proposed. Then, the integration time of specified viewing direction for the imager with a single projection center and a super-wide field of view based on freeform mirror, which is mounted on a sun-synchronous orbit satellite, is calculated. And influence on imaging quality of adjusting integration time of different grouping modes for the focal plane assembly is analyzed. The results indicate that with the constraint condition of satellite roll angle and the modulation transfer function (MTF) influence factor no more than 20°and 2% respectively, integration time of all CCDs for the whole focal plane assembly divided into two groups with each adopting the uniform integration time, can fulfill the requirements of the imaging quality for the imager.

Paper Details

Date Published: 5 August 2015
PDF: 8 pages
Proc. SPIE 9618, 2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 96180N (5 August 2015); doi: 10.1117/12.2190719
Show Author Affiliations
Huan Yin, DFH Satellite Corp., Ltd. (China)
Jun Zhu, DFH Satellite Corp., Ltd. (China)
Yongchao Zhang, DFH Satellite Corp., Ltd. (China)
Chunling Lu, DFH Satellite Corp., Ltd. (China)
Chao Wang, DFH Satellite Corp., Ltd. (China)
Xianying Ge, DFH Satellite Corp., Ltd. (China)

Published in SPIE Proceedings Vol. 9618:
2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Xiaodi Tan; Kimio Tatsuno, Editor(s)

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