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Proceedings Paper

Polarization analysis and correction for space-borne grating spectrometers
Author(s): Fa-cai Zhao; Quan-she Sun; Shao-shui Wang; Xiang-liang Zheng; Zhong Han
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Paper Abstract

In the ultraviolet and visible part of the spectrum, measurements of space-borne grating spectrometers are in general sensitive to the state of polarization of the observed light. Light reflected from the Earth’s atmosphere is polarized because of scattering of unpolarized sunlight by air molecules and aerosols. One common method to overcome polarization bias in optical systems is the insertion of a depolarizer. The sources of linear polarization sensitivity of space-borne grating spectrometers were analyzed and a model was developed using the Mueller Matrices formulating to evaluate the polarization sensitivity. The experimental results verify the correctness of the theoretical model. The theory of the quartz depolarizer operation was also described. The polarization sensitivity of the system is within the specification of 1% with inserting the depolarizer, which meets the requirement of the high precision radiance measurement in space remote sensing.

Paper Details

Date Published: 7 November 2018
PDF: 8 pages
Proc. SPIE 10832, Fifth Conference on Frontiers in Optical Imaging Technology and Applications, 1083211 (7 November 2018); doi: 10.1117/12.2507907
Show Author Affiliations
Fa-cai Zhao, 41st Research Institute of CETC (China)
Quan-she Sun, 41st Research Institute of CETC (China)
Shao-shui Wang, 41st Research Institute of CETC (China)
Xiang-liang Zheng, 41st Research Institute of CETC (China)
Zhong Han, 41st Research Institute of CETC (China)

Published in SPIE Proceedings Vol. 10832:
Fifth Conference on Frontiers in Optical Imaging Technology and Applications
Junhao Chu; Wenqing Liu; Huilin Jiang, Editor(s)

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