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12 November 2019 Spectrum selection for imaging polarization sensor
Hao Zhang, Huijie Zhao, Xudong Li, Ying Zhang, Qi Guo
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Proceedings Volume 11197, SPIE Future Sensing Technologies; 1119719 (2019) https://doi.org/10.1117/12.2547096
Event: SPIE Future Sensing Technologies, 2019, Tokyo, Japan
Abstract
Polarization sensor is a device to perceive the polarization information of skylight in polarization navigation. And imaging polarization sensor is better than the multi-channel point sensor for the advantages of wide field, large data redundancy and strong robustness. But the polarization patterns of skylight in different spectrums are different, which would represent different symmetry and structural similarity to the Rayleigh model. Meanwhile, the detectors inside have different responses in different spectrums. Therefore, the spectrum selection in the process of designing an imaging polarization sensor is an important issue. In this paper, we quantitatively evaluate the spectrum for imaging polarization sensor under the different sky conditions by two indexes: structural similarity (SSIM) index and symmetry error index. The result shows that wavelength shorter than 514nm has both higher structural similarity and symmetry in the visible spectrum. In other words, the imaging polarization sensor works better in the short-band spectrum.
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Hao Zhang, Huijie Zhao, Xudong Li, Ying Zhang, and Qi Guo "Spectrum selection for imaging polarization sensor", Proc. SPIE 11197, SPIE Future Sensing Technologies, 1119719 (12 November 2019); https://doi.org/10.1117/12.2547096
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KEYWORDS
Polarization
Sensors
Image sensors
Optical sensors
Rayleigh scattering
Ultraviolet radiation
Visible radiation
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