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Proceedings Paper

Influence of incident angle on the decoding in laser polarization encoding guidance
Author(s): Muchun Zhou; Yanru Chen; Qi Zhao; Yu Xin; Hongyuan Wen
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Paper Abstract

Dynamic detection of polarization states is very important for laser polarization coding guidance systems. In this paper, a set of dynamic polarization decoding and detection system used in laser polarization coding guidance was designed. Detection process of the normal incident polarized light is analyzed with Jones Matrix; the system can effectively detect changes in polarization. Influence of non-normal incident light on performance of polarization decoding and detection system is studied; analysis showed that changes in incident angle will have a negative impact on measure results, the non-normal incident influence is mainly caused by second-order birefringence and polarization sensitivity effect generated in the phase delay and beam splitter prism. Combined with Fresnel formula, decoding errors of linearly polarized light, elliptically polarized light and circularly polarized light with different incident angles into the detector are calculated respectively, the results show that the decoding errors increase with increase of incident angle. Decoding errors have relations with geometry parameters, material refractive index of wave plate, polarization beam splitting prism. Decoding error can be reduced by using thin low-order wave-plate. Simulation of detection of polarized light with different incident angle confirmed the corresponding conclusions.

Paper Details

Date Published: 28 August 2009
PDF: 8 pages
Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 738249 (28 August 2009); doi: 10.1117/12.835282
Show Author Affiliations
Muchun Zhou, Nanjing Univ. of Science and Technology (China)
Yanru Chen, Nanjing Univ. of Science and Technology (China)
Qi Zhao, Nanjing Univ. of Science and Technology (China)
Yu Xin, Nanjing Univ. of Science and Technology (China)
Hongyuan Wen, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7382:
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging
Farzin Amzajerdian; Chun-qing Gao; Tian-yu Xie, Editor(s)

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