Opt Lett. 2020 Jul 1;45(13):3474-3477. doi: 10.1364/OL.396574.
Full Stokes polarimetric images can be obtained from two acquisitions with a microgrid polarization camera equipped with a retarder. When the retardance is imperfectly known, it can be calibrated from the measurements, but this requires three image acquisitions and may cause divergence of estimation variance at a low signal-to-noise ratio. We determine closed-form equations allowing one to decide in which experimental conditions autocalibration is possible and useful, and to quantify the performance gain obtained in practice. These results are validated by real-world experiments.
利用配备有延迟器的微栅偏振相机进行两次采集，即可获得全斯托克斯偏振图像。如果延迟器不完全已知，则可以通过测量进行校准，但这需要三次图像采集，并且在信噪比低的情况下可能导致估计方差发散。我们确定了封闭形式的方程，这些方程可以用来判断在何种实验条件下自动校准是可行和有用的，并量化实际获得的性能增益。这些结果通过实际实验得到了验证。
