Acta Optica Sinica, Volume. 40, Issue 19, 1911001(2020)
Full Image On-Orbit Polarization Calibration Method of Multi-Angle Polarization Imager
Figures & Tables(16)
Fig. 1. Imaging coordinate system and relationship among geometric parameters of MAPI image matrix
Fig. 3. Relationship among phase function, polarized phase function, and scattering angle. (a) Relationship between phase function and scattering angle; (b) relationship between polarized phase function and scattering angle
Fig. 7. Distribution of low frequency relative transmittance of optical lens in image matrix
Fig. 8. Variation in low frequency relative transmittance of optical lens with pixel position
Fig. 9. Comparison between on-orbit polarization calibration results and laboratory polarization calibration results. (a) Central field; (b) margin field
Fig. 10. Uncertainty of polarizer channel 1. (a) u(Lr1p) varies with degree of polarization; (b) u(Lr1ε) varies with degree of polarization
Fig. 11. Uncertainty of polarizer channel 2. (a) u(Lr2p) varies with degree of polarization; (b) u(Lr2ε) varies with degree of polarization
Fig. 12. Uncertainty of polarizer channel 3. (a) u(Lr3p) varies with degree of polarization; (b) u(Lr3ε) varies with degree of polarization
Table 1. Change of average relative transmittance of filter-polarizer combination in three years
View tableTable 1. Change of average relative transmittance of filter-polarizer combination in three years
Channel Laboratory polarization calibration result Annual average value in 2016 Relative error δ in 2016 / % Annual average value in 2017 Relative error δ in 2017 / % Annual average value in 2018 Relative error δ in 2018 / % 565 nm, channel 1 1.0266 1.0145 1.17 1.0197 0.67 1.0162 1.01 565 nm, channel 3 1.0493 1.0371 1.16 1.0568 0.71 1.0381 1.06 670 nm, channel 1 1.0105 0.9752 3.49 0.9851 2.51 0.9772 3.29 670 nm, channel 3 1.0060 0.9528 5.28 0.9772 2.86 0.9543 5.13 865 nm, channel 1 1.0263 0.9871 3.81 0.9960 2.95 0.9845 4.07 865 nm, channel 3 0.9833 0.9624 2.12 0.9693 1.42 0.9529 3.09
Table 2. Fitting curve parameters of polarization degree of optical lens
View tableTable 2. Fitting curve parameters of polarization degree of optical lens
Region a5 a4 a3 a2 a1 a0 Upper left diagonal of image matrix 9.77×10-12 -4.11×10-9 5.70×10-7 2.81×10-5 8.38×10-4 3.94×10-3 Upper right diagonal of image matrix 4.56×10-12 -1.96×10-9 2.56×10-7 6.23×10-6 4.77×10-6 1.31×10-3
Table 3. Fitting curve parameters of low frequency relative transmittance of optical lens
View tableTable 3. Fitting curve parameters of low frequency relative transmittance of optical lens
Region b5 b4 b3 b2 b1 b0 Upper left diagonal of image matrix 5.18×10-12 -2.59×10-9 4.60×10-7 -3.66×10-5 7.54×10-4 0.97 Upper right diagonal of image matrix -1.15×10-11 4.96×10-9 7.57×10-7 4.54×10-6 1.13×10-3 0.97
Table 4. Polarization response matrix
View tableTable 4. Polarization response matrix
Position Polarization response matrix Central field of view Upper left field of view of image matrix Upper right field of view of image matrix
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Yipeng Zhang, Xiuqing Hu, Dekui Yin, Mingjian Gu. Full Image On-Orbit Polarization Calibration Method of Multi-Angle Polarization Imager[J]. Acta Optica Sinica, 2020, 40(19): 1911001
Paper Information
Category: Imaging Systems
Received: May. 19, 2020
Accepted: Jun. 23, 2020
Published Online: Sep. 19, 2020
The Author Email: Zhang Yipeng (zyp_47@163.com), Hu Xiuqing (huxq@cma.gov.cn), Yin Dekui (yin@mail.sitp.ac.cn)
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