Affiliation:
1. University of Chinese Academy of Science
2. Yusense Information Technology and Equipment (Qingdao) Inc.
3. Lanzhou Institute of Physics
Abstract
A channeled spectropolarimeter is a powerful tool for the simultaneous measurement of the intensity, spectral, and polarization information of a target. However, the fore-optics introduce additional polarization information, which leads to inaccurate reconstruction of the Stokes parameters. In this study, we propose a simple method for polarimetric calibration and Stokes parameters reconstruction for a fieldable channeled spectropolarimeter. The polarization effects of the fore-optics and phase factors of the high-order retarders at varying view angles are considered and calibrated independently using a single reference beam. Moreover, the misalignment of the retarders is also considered. Simulation results demonstrate that the polarization effects of fore-optics can be precisely determined, enhancing the measurement accuracy of the Stokes parameters by approximately an order of magnitude. The effectiveness of the proposed method is also verified experimentally.
Funder
National Natural Science Foundation of China
High-altitude large UAV airborne visible infrared spectral imager procurement project
HY-Multi-angle polarization spectral imaging remote sensing system
K. C. Wong Education Foundation
Shandong Province Key Agricultural Project for Application Technology Innovation
Supported by the Taishan Industrial Experts Program
Subject
Atomic and Molecular Physics, and Optics