Jianwen Weng, Yinlin Yuan, Xiaobing Zheng, Qing Kang, Bihai Tu, Maopeng Xia, Jin Hong. Method for Measuring Response Non-Uniformity of Polarization Channels in Directional Polarization Camera[J]. Acta Optica Sinica, 2020, 40(8): 0828001
- Acta Optica Sinica
- Vol. 40, Issue 8, 0828001 (2020)
Fig. 1. DPC optical system. (a) Structure of DPC optical system; (b) imaging path of DPC optical system
Fig. 2. Installation diagram of optical filter and analyser module
Fig. 3. Integral sphere reference light imaging in single field-of-view
Fig. 4. Sectional field-of-view measurement of polarization channel response non-uniformity. (a) Schematic of lighting for sectional field-of-view measurement; (b) schematic of sectional field-of-view measurement; (c) experiment diagram of sectional field-of-view measurement
Fig. 5. Response non-uniformity among three channels in same waveband. (a) Channel 13/channel 14; (b) channel 15/channel 14
Fig. 6. Bad pixel detection window
Fig. 7. Detection result of bad pixels at (187,96) of mosaic image in channel 3 sectional field-of-view imaging
Fig. 8. Calibration process of polarization channel response non-uniformity
Fig. 9. Detection of bad pixels in laboratory before launch. (a) Original image; (b) 11×11 area composite graph for detecting bad pixels
Fig. 10. Detection of bad pixels of on-orbit imaging data after launch. (a) The second circle on-orbit imaging data; (b) 11×11 area composite graph for detecting bad pixels
Fig. 11. Detection of bad pixels of imaging data after one year on-orbit operation. (a) The 5638th circle on-orbit imaging data; (b) 11×11 area composite graph for detecting bad pixels
Fig. 12. Calculation results of low and high frequency relative transmittances. (a) Low frequency relative transmittance; (b) high frequency relative transmittance
Fig. 13. Test results of integral sphere uniformity and angle characteristic. (a) Surface uniformity detection; (b) angle characteristic test curve
Fig. 14. Result of non-stability test
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Table 1. Detection results of bad pixels
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Table 2. Relative transmittance results
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Table 3. Processing results of surface uniformity test data
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Table 4. Processing results of angular characteristic data
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Table 5. Results of non-stability test
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