利用折射率可以建立偏振度与液体密度之间的函数关系.以不同浓度的盐水为例，通过USB2000光谱仪测得高光谱偏振信息并计算其密度，发现在不同入射角度计算不同浓度的盐水密度的最佳波段不同，在最佳波段范围内计算的盐水密度精度高.当入射角趋近布儒斯特角时最佳波段范围变宽，可以满足现今遥感技术的要求.该研究结果为遥感技术在监测水体密度方面提供了新的科学依据.

The relation between the polarization index and the liquid density can be established in term of refractive index. USB2000 spectroscopy was used to obtain the hyperspectral polarization information of brine with different concentrations, and the briny density was calculated. It is found that the optimum wavelength bands of light incident at different angles are different for brine with different concentrations. The precision of the briny density calculated in the best bands is the highest. The best bands become wider when incident angle approaches the Brewster angle, which can satisfy the demand of the present remote sensing technology. The results provide a new scientific basis for monitoring the density of water by using remote sensing technology.