水体多角度偏振遥感机理研究  

Research on solar incident angle of water body polarized remote sensing

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：《光学技术》2014年第3期225-229,共5页Optical Technique

基　　金：四川省教育厅青年基金项目(07ZB046);内江师范学院实验教学示范中心项目(XSJ201103)

摘　　要：从水体的偏振探测机理出发,建立了偏振度与折射率的关系,探讨了在不同折射率组合情况下的偏振度变化规律。结果表明,由于不同折射率的水体在达到偏振度极值时入射角不同,当太阳入射角在交点角区间左侧时,偏振度与水体折射率成反比,当太阳入射角在交点角区间右侧时,偏振度与水体折射率成正比;不同折射率组合情况下的偏振度差值在太阳入射角40°左右和太阳入射角70°左右时达到极值。在最佳角度范围内获取偏振信息,可以使水体遥感的精度得到提高。On the basis of polarized detection mechanism, the relationship between the polarization degree and the refractive index is established, and the change regulation on different refractive indexes combination is discussed. The results show that when the solar incident angle at the left of the intersection angle, the polarization degree is inversely proportional to the refractive index, and when the solar incident angle at the right of the intersection angle, the polarization degree is proportional to the refractive index. The D-values of polarization degree reaches the maximum at the solar incident angle 40°or 70°. To obtain polarization information in the suitable angle, the accuracy of the water remote sensing can be improved.

关 键 词：水体遥感 偏振度 太阳入射角 机理 

分 类 号：O436.5[机械工程—光学工程]