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。
2
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.