Calibration for Polarization Remote Sensing System with Focal Plane Divided by Multi-Linear Array

Haiyang, 张海洋 Zhang; Jun-qiang, 张军强 Zhang; Yang, Bin; Chang-xiang, 颜昌翔 Yan

doi:10.3788/aos201636.1128003

Cited by 5 publications

(2 citation statements)

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“…The effect of extinction ratio is analyzed using a single pixel channel. According to the literature [34,[38][39][40][41], the extinction ratio of polarizer can be expressed as follows: ER = 10 log 10 (I max /I min )…”

Section: Array Polarizer Model With Extinction Ratiomentioning

confidence: 99%

Sensor Modeling and Calibration Method Based on Extinction Ratio Error for Camera-Based Polarization Navigation Sensor

Ren

Jian

Liu

et al. 2020

Sensors

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The performance of camera-based polarization sensors largely depends on the estimated model parameters obtained through calibration. Limited by manufacturing processes, the low extinction ratio and inconsistency of the polarizer can reduce the measurement accuracy of the sensor. To account for the challenges, one extinction ratio coefficient was introduced into the calibration model to unify the light intensity of two orthogonal channels. Since the introduced extinction ratio coefficient is associated with degree of polarization (DOP), a new calibration method considering both azimuth of polarization (AOP) error and DOP error for the bionic camera-based polarization sensor was proposed to improve the accuracy of the calibration model parameter estimation. To evaluate the performance of the proposed camera-based polarization calibration model using the new calibration method, both indoor and outdoor calibration experiments were carried out. It was found that the new calibration method for the proposed calibration model could achieve desirable performance in terms of stability and robustness of the calculated AOP and DOP values.

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Section: Array Polarizer Model With Extinction Ratiomentioning

confidence: 99%

Sensor Modeling and Calibration Method Based on Extinction Ratio Error for Camera-Based Polarization Navigation Sensor

Ren

Jian

Liu

et al. 2020

Sensors

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“…For a common wire grid analyzer, it isn't an ideal analyzer as the extinction ratio at visual band is E = 1/200. When we are only concerned about the analyzer, the relative deviation δ(E) of polarization detection with reference to an ideal analyzer is calculated as [20].…”

Section: Main Polarization Parameters Of the Polarimetric Cameramentioning

confidence: 99%

On-Orbit Polarization Calibration for Multichannel Polarimetric Camera

et al. 2019

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In this paper, a new on-orbit polarization calibration method for the multichannel polarimetric camera is presented. A polarization calibration model for the polarimetric camera is proposed by taking analysis of the polarization radiation transmission process. In order to get the polarization parameters in the calibration model, an on-orbit measurement scheme is reported, which uses a solar diffuser and a built-in rotatable linear analyzer. The advantages of this scheme are sharing the same calibration assembly with the radiometric calibration and acquiring sufficient polarization accuracy. The influence of the diffuser for the measurement is analyzed. By using a verification experiment, the proposed method can achieve on-orbit polarization calibration. The experimental results show that the relative deviation for the measured degree of linear polarization is 0.8% at 670 nm, which provides a foundation for the accurate application of polarimetric imaging detection.

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