Polarization Radiometric Calibration in Laboratory for a Channeled Spectropolarimeter

Wenhe Xing, Xueping Ju, Jian Bo, Changxiang Yan, Bin Yang, Shuyan Xu, Junqiang Zhang
2020 Applied Sciences  
The process of radiometric calibration would be coupled with the polarization properties of an optical system for spectropolarimetry, which would have significant influences on reconstructed Stokes parameters. In this paper, we propose a novel polarization radiometric calibration model that decouples the radiometric calibration coefficient and polarization properties of an optical system. The alignment errors of the polarization module and the variation of the retardations at different fields
more » ... view are considered and calibrated independently. According to these calibration results, the input Stokes parameters at different fields of view can be reconstructed accurately through the proposed model. Simulations are performed for the presented calibration and reconstruction methods, which indicate that the measurement accuracy of polarization information is improved compared with the traditional undecoupled calibration method.
doi:10.3390/app10228295 fatcat:wc5qmuz4hfdtbkc2jf65vkmgy4