Influence of Collimator Divergence Angle on Geometric Calibration Accuracy of Directional Polarimetric Camera and its correction method

Guangfeng Xiang; Binghuan Meng; Chan Huang; Shuang Li; Sunlong Xu; Yang Li; Lin Han; Liang Sun; Donggen Luo; Jin Hong

doi:10.3788/AOS202141.2408002

Acta Optica Sinica, Volume. 41, Issue 24, 2408002(2021)

Influence of Collimator Divergence Angle on Geometric Calibration Accuracy of Directional Polarimetric Camera and its correction method

Guangfeng Xiang^1,2,3、**, Binghuan Meng^1,3、*, Chan Huang^1,2,3, Shuang Li^1,3, Sunlong Xu^1,3, Yang Li^1,2,3, Lin Han^1,3, Liang Sun^1,3, Donggen Luo^1,3, and Jin Hong^1,3、***

Author Affiliations

¹Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China

²University of Science and Technology of China, Hefei, Anhui 230026, China

³Key Laboratory of Optical Calibration and Characterization, Chinese Academy of Sciences, Hefei, Anhui 230031, China

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Figures & Tables(12)

Fig. 1. Optical system structure of DPC

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Fig. 2. Distortion characteristic of DPC

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Fig. 3. Geometric model of DPC

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Fig. 4. Laboratory geometric calibration device of DPC

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Fig. 5. Object-image relationship of collimator

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Fig. 6. Positioning error of image point (regardless of distortion)

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Fig. 7. Positioning error of image point (considering distortion, divergence angle α=2°)

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Fig. 8. Spot distribution diagram of geometric calibration test

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Fig. 9. Fitting residual contrast of 670-nm band. (a) X direction; (b) Y direction; (c) Euclidean distance

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Fig. 10. Image point position deviation calculated by geometric model

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Table 1. Basic parameters of DPC

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Table 1. Basic parameters of DPC

Parameter		GF-5	GF-5(02)	CM	DQ-1
Focal length /mm		4.8	5.54	4.8	5.54
FOV /(°)	Cross track	±50	±50	±50	±50
	Along track	±50	±50	±40	±50
Relative aperture		1∶4	1∶4.26	1∶4	1∶4.26
CCD array size		512×512	1024×1024	360×512	1024×1024
Pixel size /μm		22.5×22.5	13×13	22.5×22.5	13×13
Band /nm	Polarized	490(20)、670(20)、865(40)
	Non-polarized	443(20)、565(20)、763(10)、765(40)、910(20)

Table 2. Geometric model parameters of DPC

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Table 2. Geometric model parameters of DPC

Band /nm	Original method					Proposed method
Band /nm	$X_{k}^{S}$	$Y_{k}^{S}$	f₁_k	f₃_k	f₅_k	$X_{k}^{S}$	$Y_{k}^{S}$		f₁_k	f₃_k		f₅_k
443	200.79		255.79		216.26			2.01			-1.45		200.79	255.79	216.20	1.90	-1.41
490	200.81		255.83		215.85			2.47			-1.65		200.81	255.83	215.80	2.35	-1.60
565	200.75		255.82		215.52			3.03			-1.89		200.75	255.82	215.46	2.93	-1.86
670	200.78		255.84		215.32			3.54			-2.12		200.78	255.84	215.27	3.45	-2.10
763	200.73		256.80		215.25			3.83			-2.25		200.72	256.80	215.20	3.74	-2.22
765	200.78		255.79		215.24			3.84			-2.25		200.78	255.79	215.19	3.75	-2.22
865	200.80		255.81		215.17			4.10			-2.36		200.79	255.81	215.12	3.99	-2.33
910	200.82		255.80		215.16			4.16			-2.39		200.82	255.80	215.11	4.07	-2.36

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Guangfeng Xiang, Binghuan Meng, Chan Huang, Shuang Li, Sunlong Xu, Yang Li, Lin Han, Liang Sun, Donggen Luo, Jin Hong. Influence of Collimator Divergence Angle on Geometric Calibration Accuracy of Directional Polarimetric Camera and its correction method[J]. Acta Optica Sinica, 2021, 41(24): 2408002

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Paper Information

Category: Geometric Optics

Received: May. 10, 2021

Accepted: Jun. 22, 2021

Published Online: Nov. 30, 2021

The Author Email: Xiang Guangfeng (xgf056@mail.ustc.edu.cn), Meng Binghuan (bhmeng@aiofm.ac.cn), Hong Jin (hongjin@aiofm.ac.cn)

DOI:10.3788/AOS202141.2408002

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