Optics and Precision Engineering, Volume. 30, Issue 1, 31(2022)
Calibration of polarization axis direction of sub focal plane polarization image sensor
Figures & Tables(10)
Fig. 1. Structure of pixel array of sub focal plane polarization image sensor
Fig. 2. Structure of calibration device for sub focal plane polarization image sensor
Fig. 3. Principle of calibration method for sub focal plane polarization image sensor
Fig. 5. Calibration devices for polarization axis direction of sub focal plane polarization image sensor
Fig. 6. Fitting results of response values of each polarization channel changing with angle
Table 1. Results of polarization axis direction simulation calibration
View tableView in ArticleTable 1. Results of polarization axis direction simulation calibration
Number 0 45 90 135 1 0.00 44.99 90.00 135.00 2 0.00 44.99 90.00 135.00 3 0.00 44.99 90.00 135.00 4 0.00 44.99 90.00 135.00
Table 2. Composition and equipment parameters of calibration devices
View tableView in ArticleTable 2. Composition and equipment parameters of calibration devices
Name Parameter Value Integrating sphere Uniformity >98% Polarizer Extinction ratio >1000 Turntable Min step size 1/800°
Table 3. Fourier fitting result of sampling sequence
View tableView in ArticleTable 3. Fourier fitting result of sampling sequence
Nominal value/（°） a0 a1 b0 w R2 0 165.40 53.81 -95.64 2 0.999 6 45 169.20 95.64 55.27 2 0.999 4 90 170.40 -55.30 95.61 2 0.999 6 135 166.50 -96.33 -55.31 2 0.999 4
Table 4. Nominal and actual values of polarization principal axis direction
View tableView in ArticleTable 4. Nominal and actual values of polarization principal axis direction
Nominal value Calibration value Difference 0 0.000 0 45 45.090 0.090 90 90.100 0.100 135 135.010 0.010
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Yang BAI, Kaichun ZHAO, Zheng YOU. Calibration of polarization axis direction of sub focal plane polarization image sensor[J]. Optics and Precision Engineering, 2022, 30(1): 31
Paper Information
Category: Modern Applied Optics
Received: May. 11, 2021
Accepted: --
Published Online: Jan. 20, 2022
The Author Email: ZHAO Kaichun (kaichunz@mail.tsinghua.edu.cn)
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