15 November 2017 Calibration method for equivalent extinction ratio of polarized pixel in integrated micropolarizer array camera
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Proceedings Volume 10605, LIDAR Imaging Detection and Target Recognition 2017; 106051B (2017) https://doi.org/10.1117/12.2287591
Event: LIDAR Imaging Detection and Target Recognition 2017, 2017, Changchun, China
Abstract
Equivalent extinction ratio and polarization orientation are two significant parameters representing the performance of a polarized pixel in an integrated micropolarizer array camera. With manufacturing and integrating errors of the micropolarizer array, equivalent extinction ratios are nonuniform and polarization orientations of polarized pixels deviate from their nominal values. Measuring the equivalent extinction ratio and the polarization orientation of each polarized pixel by rotating a polarizer at a tiny step is extremely time-consuming and even inaccurate. Therefore, this paper proposes a calibration method for the equivalent extinction ratio and the polarization orientation of each polarized pixel. Its principle is derived by theorizing the relationship between an orientation of a linearly polarized incident light and its digital output of a polarized pixel. In experiment, this derived principle is applied to an integrated micropolarizer array camera. Experimental result proves that calibrated equivalent extinction ratios generally vary from 4.5 to 10, with a mean of 7.939 and a standard variation of 1.053.
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Bin Feng, Bin Feng, Zelin Shi, Zelin Shi, Haizheng Liu, Haizheng Liu, Yaohong Zhao, Yaohong Zhao, Jianting Liu, Jianting Liu, } "Calibration method for equivalent extinction ratio of polarized pixel in integrated micropolarizer array camera", Proc. SPIE 10605, LIDAR Imaging Detection and Target Recognition 2017, 106051B (15 November 2017); doi: 10.1117/12.2287591; https://doi.org/10.1117/12.2287591
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