偏振度曲线随折射率变化的规律研究  

Regulations of polarization degree curve change with refractive index

作　　者：罗杨洁[1] 

机构地区：[1]内江师范学院地理与资源科学学院,四川内江641100

出　　处：《测绘科学》2014年第3期37-40,共4页Science of Surveying and Mapping

基　　金：四川省教育厅青年基金项目(07ZB046);四川省科技厅重点科技自筹项目(2010JY0184);内江师范学院实验教学示范中心项目(XSJ201103)

摘　　要：本文从目标地物的偏振探测机理出发,讨论了偏振度曲线的空间特征,及其在不同折射率组合情况下的变化规律。结果表明,随着物体折射率的增加,使物体偏振度达到极值的布儒斯特角也逐渐增大;折射率间隔相同的情况下,偏振度差值与折射率基数成反比关系,并且,折射率基数小的组合比折射率基数大的组合的变化要显著;折射率间隔不同的情况下,折射率基数相同时,偏振度差值与折射率间隔成正比,并且,折射率基数小的组合比折射率基数大的组合的变化要显著。多角度偏振遥感中,在折射率偏小的环境下更有利于观测地物的微小差异,并且适宜于大角度观测。On the basis of polarized detection mechanism, the spatial characteristics of the polarized degree curve and the variation of the different combinations of refractive index were discussed in the pa per. The results showed that with the increase of refractive index, the Brewster angle making the polarized degree at the extreme was gradually increasing. The D values of polarization degree were inversely propor- tional to the refractive index base under the circumstances of the same refractive indexes intervals, and the combination of smaller refractive index base appeared significantly change. The D-values of polarization de- gree were proportional to the refractive index interval under the circumstances of different refractive inde- xes intervals and same base, and the combination of smaller refractive index base appear significantly change. Finally, when using the multi-angle polarized remote sensing from a large incidence angle, the smaller discrepancy of obiects in small refractive index environment was enhanced.

关 键 词：应用光学 偏振度曲线 多角度 折射率 变化规律 

分 类 号：P23[天文地球—摄影测量与遥感]