利用白天天空偏振观测推导望远镜Mueller矩阵
Deriving Telescope Mueller Matrices Using Daytime Sky Polarization Observations
摘要：
望远镜经常修改光源的输入偏振，使得测量的光信号的圆形或线性输出状态可以与输入显著不同。这种混合或偏振“串扰”由光学系统米勒矩阵定义。我们在这里描述了一种有效的方法，用于恢复光的输入偏振状态和望远镜的完整4 x 4 Mueller矩阵，精确度为百分之几，无需外部掩模或望远镜硬件修改。使用哈雷阿卡拉3.7米AEOS望远镜和Coude分光偏振仪对明亮的、高度偏振的白天天空进行的观测证明了这种技术。
英文摘要：
Telescopes often modify the input polarization of a source so that the measured circular or linear output state of the optical signal can be signficantly different from the input. This mixing, or polarization "cross-talk", is defined by the optical system Mueller matrix. We describe here an efficient method for recovering the input polarization state of the light and the full 4 x 4 Mueller matrix of the telescope with an accuracy of a few percent without external masks or telescope hardware modification. Observations of the bright, highly polarized daytime sky using the Haleakala 3.7m AEOS telescope and a coude spectropolarimeter demonstrate the technique.
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