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Proceedings Paper

Study on effect of polarization for improving signal noise ratio of stellar objects in daytime
Author(s): Rui-jin Zhang; Hao Xian; Kai Wei; Chang-hui Rao
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Paper Abstract

Sky background is one of the main noise sources in astronomy observation. Most of the telescopes work well in nighttime with low sky background, but do not work anymore in daytime with strong sky background. Polarization filtering is a critical method that can be used to suppress the sky background and improve the signal noise ratio (SNR) of object signal. Experimental device with polarization filtering technology was constructed in 1.8m adaptive optics (AO) telescope of Yunnan observatory, to identify the effect of polarization filtering technology. Experimental results indicate that the SNR (ratio of object energy to noise's mean square deviation) of stellar objects could be improved to 1 to 3 times at different observation conditions, which is significative to star detection in daytime. Experimental results also indicate that polarization filtering technology is effective and important in observing different kinds of stellar objects in daytime condition. Furthermore, it also makes it possible to apply our AO system in daytime in future.

Paper Details

Date Published: 8 September 2011
PDF: 6 pages
Proc. SPIE 8191, International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, 81911M (8 September 2011); doi: 10.1117/12.900754
Show Author Affiliations
Rui-jin Zhang, Institute of Optics and Electronics (China)
Graduate School of the Chinese Academy of Sciences (China)
Hao Xian, Institute of Optics and Electronics (China)
Kai Wei, Institute of Optics and Electronics (China)
Chang-hui Rao, Institute of Optics and Electronics (China)


Published in SPIE Proceedings Vol. 8191:
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies
Yuelin Wang; Huikai Xie; Yufeng Jin, Editor(s)

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