Calibration method for thermal infrared division-of-focal-plane polarimeters considering polarizer reflection characteristics

Owing to manufacturing defects of micropolarizer arrays and differences in the pixel response of detectors, division-of-focal-plane (DoFP) polarimeters have severe nonuniformity, which affects the measurement accuracy of the polarimeters and the calculation of the polarization information. This stud...

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Bibliographic Details
Published in:Applied optics (2004) 2023-12, Vol.62 (35), p.9215
Main Authors: Yang, Jianguo, Cui, Hao, Li, Li, Jin, Weiqi, Sun, Zunyi
Format: Article
Language:English
Subjects:
Blackbody
Calibration
Focal plane
Infrared radiation
Manufacturing defects
Nonuniformity
Polarimeters
Polarization
Polarized radiation
Polarizers
Radiation sources
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Summary:Owing to manufacturing defects of micropolarizer arrays and differences in the pixel response of detectors, division-of-focal-plane (DoFP) polarimeters have severe nonuniformity, which affects the measurement accuracy of the polarimeters and the calculation of the polarization information. This study proposes a calibration method for thermal infrared DoFP polarimeters considering polarizer reflection characteristics. The temperature-controlled adjustable infrared polarized radiation source is calibrated by a division-of-time polarimeter and is, in turn, used to calibrate a thermal infrared DoFP polarimeter. Through laboratory blackbody and external scenes, the performance of the proposed method is compared to that of state-of-the-art techniques. The experimental results indicate that the proposed method effectively avoids overcalibration and improves the accuracy of polarization information.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.500712