几种地物反射光的偏振特性

Polarization of Reflected Light by Earth Objects

偏振测量具有很多普通的光强度测量不具备的优点,是研究地表、大气,探索太空的良好辅助手段。为了获得可见红外偏振光谱,从而考察利用偏振遥感识别目标的可行性,采用求取斯托克斯参量的方法,分别对草地、黄色环氧板、沥青楼顶、绿帆布、水泥路面及铁板六个样品做了反射光偏振特性测量,并对它们的偏振光谱进行了详细比较,分析了其形成原因。结果表明偏振特性与目标的性质、测量波长、观测角度均有很大关系,偏振测量在遥感和目标识别方面具有重要的意义。

Compared with the traditional luminosity and radiation remote sensing methods, polarization measurement has many unique advantages. To achieve visible-infrared polarimetric spectra, the polarimetric spectra of six objects are measured with Stokes parameter method, including both natural objects and man-made objects. Their polarimetric spectra are compared in detail and the forming mechanism are analysed, too. The results show the significance of polarization measurement in remote sensing and object discrimination.