大气偏振中性点的便携式测量  

Portable measurement of neutral points in atmospheric polarization pattern

作　　者：胡睿 梁磊 王方原 李树[1,2] 汪杰君[1,2,3] HU Rui;LIANG Lei;WANG Fangyuan;LI Shu;WANG Jiejun(School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, China;Guangxi Key Laboratory of Photoelectric Information Processing, Guilin University of Electronic Technology, Guilin 541004, China;School of Marine Engineering, Beihai Campus, Guilin University of Electronic Technology, Beihai 536000, China)

机构地区：[1]桂林电子科技大学电子工程与自动化学院,桂林541004 [2]桂林电子科技大学广西光电信息处理重点实验室,桂林541004 [3]桂林电子科技大学北海校区海洋工程学院,北海536000

出　　处：《激光技术》2020年第6期700-705,共6页Laser Technology

基　　金：国家自然科学基金资助项目(41561079);广西光电信息处理重点实验主任基金资助项目(GD18104,GD18105)。

摘　　要：为了避免常用的天空光偏振模式测量仪器中鱼眼镜头所引起的图像边缘区域扭曲的缺点,采用手机相机和线性偏振片相结合的方法,进行了理论分析和实际验证,得到了大气偏振模式的分布情况和中性点位置的数据。结果表明,实际测量的中性点区域与理论仿真的结果间高度角的偏差为2.4°±2.6°,方位角的偏差为1.4°±0.8°,证明了测量方法的可行性;随着天空中云层的增加,天空光偏振分布图像会发生扭曲,但仍然可以确定中性点位置,为天空光偏振仿生导航提供了参考。该研究可用来确定太阳位置、实现自身定向及导航定位,并且具有易操作、便携等优点,在一定程度上降低了天空光偏振仿生导航的成本,提高了民用价值。In order to avoid the distort of the edge area of the image from the acquired data through a fisheye lens,a simple method of combining a mobile phone camera and a linear polarizer was adopted in this study.The method was used for theoretical analysis and practical verification,and data on the distribution of the atmospheric polarization pattern and the position of the neutral points were obtained.The results show that the deviation of the altitude angle between the actual measured the area of the neutral point and the result of theoretical simulation is 2.4°±2.6°;the deviation of the azimuth angle is 1.4°±0.8°,which proves the feasibility of the measurement method.As the increasing of the clouds in the sky,the image of the polarization pattern distribution of sky light will be distorted,especially the polarization angle image.However,it is still possible to determine the position of the neutral points,thereby determining the navigation reference line,and providing a reference for polarized bionic navigation of sky light.The research can also be used to determine the position of the sun,achieve self-orientation,and navigation positioning.The method used in this research has the advantages of easy operation and portability.This method reduces the cost of sky light polarized bionic navigation to a certain extent,and improves the civilian value.

关 键 词：散射 中性点 Rayleigh散射 大气偏振模式 

分 类 号：O436.3[机械工程—光学工程]