It can gives color difference of objects based on semispherical spectral reflectance in visible and near infrared wave bands measured by its internal spectrometer.

它利用其内置的光谱仪可测得可见-近红外波段反射物体的半球空间的反射比，继而可反演出物体的色度特性。

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Mueller matrix of anisotropy surface in the near-normal incident is derived in this paper, and a new type of reflectance difference spectrometer has been designed based on the matrix.

以米勒矩阵理论为基础，推导出了各向异性表面近正入射反射米勒矩阵，并以此为依据给出反射差别系统的优化设计。

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