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Abstract

The division-of-amplitude full Stokes simultaneous polarization imaging system has prominent merits, such as real time, high spatial resolution, high precision, etc. The development of the division-of-amplitude full Stokes simultaneous polarization imaging system has a high application value. The division-of-amplitude full Stokes simultaneous polarization imaging system uses polarization beam splitters, a half wave plate (HWP) and a quarter wave plate (QWP) to modulate the incident Stokes vector into four intensity images. Using the four intensity images, the incident Stokes vector can be analyzed. In the system, the phase delay errors of the HWP and the QWP have a direct influence on the measurement accuracy of the incident Stokes vector. A Stokes vector measurement error equation containing the phase delay errors of the HWP and the QWP is established. When there are the phase delay errors of the HWP and the QWP in the system, the Stokes vector measurement errors of the unpolarized light, 0° liner polarized light, 90° liner polarized light, 45° liner polarized light, 135° liner polarized light, right circularly polarized light and left circularly polarized light are analyzed. A method of solving the Stokes vector measurement error of incident light with any polarization state is given. When the Stokes vectors with different degrees of polarization (DOPs) are used as the incident light, the simulation results show that both the Stokes vector measurement error and the DOP measurement error increase with the DOP of incident light increasing. Therefore, we select the polarization measurement accuracy to evaluate the system when the DOP of incident light equals 1. To ensure that the polarization measurement accuracy of the system is within 2%, the phase delay error of the HWP should be within ±1.6° and the phase delay error of the QWP should be within ±0.5°. The analysis results of the phase delay errors of the HWP and the QWP are of great significance for improving the polarization measurement accuracy of the division-of-amplitude full Stokes simultaneous polarization imaging system, and also provide important theoretical guidance in designing and developing the system.

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Authors and contacts

Corresponding author:Yin Yu-Long,yinyulong_yyl@163.com; Sun Xiao-Bing,xbsun@aiofm.ac.cn;

Funds:Project supported by the National Key Research and Development Program of China (Grant No. 2016YFE0201400), the Common Key Technology Project for Satellite Application of China (Grant No. 30-Y20A010-9007-17/18), the National High Resolution Major Special Project of China (Grant No. GFZX04011805), and the Key Project of Hefei Research Institute of Chinese Academy of Sciences (Grant No. Y73H9P1801).

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Cited By

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参数名称	参数值
1/2波片相位延迟量 (Retardance of HWP)	180°
1/4波片相位延迟量 (Retardance of QWP)	90°
1/2波片快轴方位角 (Fast axis orientation of HWP)	−22.5°
1/4波片快轴方位角 (Fast axis orientation of QWP)	45°
部分偏振分束器分束比 (Splitting ratio of PPBS)	T_p/T_s= 0.8/0.2

DownLoad: CSV

$\sigma $	$\delta$
$\sigma $	−1.0°	−0.9°	−0.6°	−0.5°	0°	0.5°	0.6°	0.9°	1.0°
−3.2°	3.22%	3.07%	2.65%	2.53%	2.03%	2.54%	2.68%	3.11%	3.26%
−3.1°	3.17%	3.02%	2.59%	2.47%	1.97%	2.48%	2.62%	3.05%	3.20%
−1.7°	2.50%	2.32%	1.82%	1.66%	1.06%	1.67%	1.83%	2.33%	2.50%
−1.6°	2.46%	2.28%	1.77%	1.61%	1.00%	1.62%	1.78%	2.28%	2.46%
−0.5°	2.13%	1.92%	1.31%	1.12%	0.31%	1.12%	1.31%	1.92%	2.13%
0°	2.09%	1.88%	1.25%	1.04%	0	1.04%	1.25%	1.88%	2.09%
0.5°	2.13%	1.92%	1.32%	1.12%	0.31%	1.12%	1.32%	1.92%	2.13%
1.6°	2.45%	2.27%	1.77%	1.62%	1.00%	1.61%	1.77%	2.27%	2.45%
1.7°	2.49%	2.31%	1.82%	1.67%	1.06%	1.66%	1.82%	2.31%	2.49%
3.1°	3.20%	3.05%	2.64%	2.50%	1.95%	2.46%	2.59%	3.02%	3.17%
3.2°	3.25%	3.11%	2.70%	2.57%	2.02%	2.52%	2.65%	3.07%	3.22%

DownLoad: CSV

$\sigma$	$\delta $
$\sigma$	−1.0°	−0.9°	−0.6°	−0.5°	0°	0.5°	0.6°	0.9°	1.0°
−3.2°	4.01%	4.01%	4.01%	4.01%	4.01%	4.01%	4.01%	4.01%	4.01%
−3.1°	3.88%	3.88%	3.88%	3.88%	3.88%	3.88%	3.88%	3.88%	3.88%
−1.7°	3.48%	3.14%	2.11%	2.11%	2.11%	2.11%	2.11%	3.14%	3.48%
−1.6°	3.48%	3.14%	2.09%	1.99%	1.99%	1.99%	2.09%	3.14%	3.48%
−0.5°	3.48%	3.14%	2.09%	1.74%	0.62%	1.74%	2.09%	3.14%	3.48%
0°	3.48%	3.14%	2.09%	1.74%	0	1.74%	2.09%	3.14%	3.48%
0.5°	3.48%	3.14%	2.09%	1.74%	0.62%	1.74%	2.09%	3.14%	3.48%
1.6°	3.48%	3.14%	2.09%	1.99%	1.99%	1.99%	2.09%	3.14%	3.48%
1.7°	3.48%	3.14%	2.11%	2.11%	2.11%	2.11%	2.11%	3.14%	3.48%
3.1°	3.88%	3.88%	3.88%	3.88%	3.88%	3.88%	3.88%	3.88%	3.88%
3.2°	4.01%	4.01%	4.01%	4.01%	4.01%	4.01%	4.01%	4.01%	4.01%

DownLoad: CSV

参数名称	参数值
He-Ne激光器输出波长	632.99 nm
He-Ne激光器光强稳定性	± 0.1%
电动转台旋转精度	0.005°
偏振片消光系数	≥ 10000∶1
零级QWP相位延迟量	89.87°@632.99 nm

DownLoad: CSV

参数名称	参数值
PPBS分束比${{T_{\rm p}^{({\rm PPBS})}} / {T_{\rm s}^{({\rm PPBS})}}}$	0.788/0.191
零级HWP相位延迟量	179.74°@632.99 nm
零级QWP相位延迟量	89.87°@632.99 nm
零级HWP快轴方位角	−22.5°
零级QWP快轴方位角	45°
PBS1分束比${{T_{\rm{p}}^{({\rm{PBS1}})}} / {T_{\rm{s}}^{({\rm{PBS1}})}}}$	0.981/0.0007
PBS2分束比${{T_{\rm{p}}^{({\rm{PBS2}})}} / {T_{\rm{s}}^{({\rm{PBS2}})}}}$	0.988/0.0008

DownLoad: CSV

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Vol. 68, Issue 2 - 2019-01-20

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