Jones Stephen, Iannarilli Frank, Kebabian Paul
Opt Express. 2004 Dec 27;12(26):6559-73. doi: 10.1364/opex.12.006559.
We discuss achievement of a long-standing technology goal: the first practical realization of a quantitative-grade, field-worthy snapshot imaging spectropolarimeter. The instrument employs Polarimetric Spectral Intensity Modulation (PSIM), a technique that enables full Stokes instantaneous "snapshot" spectropolarimetry with perfect channel registration. This is achieved with conventional single beam optics and a single focal plane array (FPA). Simultaneity and perfect registration are obtained by encoding the polarimetry onto the spectrum via a novel optical arrangement which enables sensing from moving platforms against dynamic scenes. PSIM is feasible across the electro-optical sensing range (UV-LWIR). We present measurement results from a prototype sensor that operates in the visible and near infrared regime (450-900 nm). We discuss in some detail the calibration and Stokes spectrum inversion algorithms that are presently achieving 0.5% polarimetric accuracy.
首次实际实现定量级、适用于野外的快照成像光谱偏振计。该仪器采用偏振光谱强度调制（PSIM）技术，该技术能够通过完美的通道配准实现全斯托克斯瞬时“快照”光谱偏振测量。这是通过传统的单光束光学器件和单个焦平面阵列（FPA）实现的。通过一种新颖的光学装置将偏振测量编码到光谱上，从而实现同时性和完美配准，该装置能够在动态场景下从移动平台进行传感。PSIM在整个电光传感范围（紫外-长波红外）内都是可行的。我们展示了一个工作在可见光和近红外波段（450-900纳米）的原型传感器的测量结果。我们详细讨论了目前偏振测量精度达到0.5%的校准和斯托克斯光谱反演算法。
