Estimating of the PSF of space camera based on in-orbit wavefront sensing

Fei Li*, Xinqi Hu, Qianqian Sun

*此作品的通讯作者

科研成果: 书/报告/会议事项章节会议稿件同行评审

1 引用 (Scopus)

摘要

An accurate estimation of the point spread function (PSF) is very useful in image restoration. This paper proposes a method of estimating the PSF of space camera based on in-orbit wavefront sensing. Three wavefront sensors are used to measure the wave-front errors of the space camera, with one sensor in the center field and the other two sensors in the two edge fields. The wavefront errors of other fields can be estimated by interpolation. Then, the PSFs of each field can be estimated using the wavefront errors. For monochromatic light, the PSF can be calculated by Fourier Transformation. For a white light imaging system, the PSF is a weighted integration of the monochromatic PSFs. The weighting coefficient is the product of the sun-light spectrum, spectral reflection factor of the object, spectral transmission factor of the optical system, and the spectral response of the image detector. Because different object has a different spectral reflection factor, to be practical and simple, we use an average spectral reflection factor of typical ground scenes instead. It will induce error in the PSF estimations by using the average reflection factor instead of the real one. This error is analyzed in the paper which shows that the error is acceptable.

源语言英语
主期刊名2015 International Conference on Optical Instruments and Technology
主期刊副标题Optoelectronic Measurement Technology and Systems, OIT 2015
编辑Kexin Xu, Hai Xiao, Jigui Zhu, Hwa-Yaw Tam, Sen Han
出版商SPIE
ISBN(电子版)9781628418040
DOI
出版状态已出版 - 2015
活动2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, OIT 2015 - Beijing, 中国
期限: 17 5月 201519 5月 2015

出版系列

姓名Proceedings of SPIE - The International Society for Optical Engineering
9623
ISSN(印刷版)0277-786X
ISSN(电子版)1996-756X

会议

会议2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, OIT 2015
国家/地区中国
Beijing
时期17/05/1519/05/15

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引用此

Li, F., Hu, X., & Sun, Q. (2015). Estimating of the PSF of space camera based on in-orbit wavefront sensing. 在 K. Xu, H. Xiao, J. Zhu, H.-Y. Tam, & S. Han (编辑), 2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, OIT 2015 文章 96230A (Proceedings of SPIE - The International Society for Optical Engineering; 卷 9623). SPIE. https://doi.org/10.1117/12.2197121