天空光偏振模式自动探测装置  

Automatic detection system for skylight polarized pattern

作　　者：赵开春[1] 卢皓[1,2] 尤政[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084 [2]军械工程学院,河北石家庄050003

出　　处：《光学精密工程》2013年第2期239-245,共7页Optics and Precision Engineering

基　　金：中国博士后科学基金特别资助项目(201104127)

摘　　要：为了获得较高的天空偏振光导航精度,研究了天空光偏振模式的模型。设计了天空光偏振模式自动探测装置,用于获取大量的天空光偏振模式信息并构建天空光偏振模式模型。该装置克服了传统天空偏振光分布模式探测仪器操作繁琐,效率低的缺点,利用计算机控制角度旋转和相机拍照协同工作,能够简单快捷地实现一键采集一组天空偏振图像。测试显示,该装置能够准确地在预期位置完成偏振图像的采集工作。获得的图像偏振模式明显,对于光强度的探测精度优于0.237 5(3σ)灰度值(8bits),平均每个测量点耗时3.02s,采集效率较传统偏振模式探测仪器大为提高,能够实现天空光偏振模式的有效探测。To obtain higher navigation accuracy of skylight polarization,the polarization model for skylight was researched.An automatic detecting system of skylight polarized pattern was designed to get a large number of images to build an accurate model of skylight.The system overcomes the complex operation and the low efficiency from traditional detecting systems.It integrates a camera and the control system of precision rotating platform in an acquisition system to acquire the polarized images rapidly and easily in a key gathering a group of images.The test indicates that the acquisition system can get all of images in the angle that we expect,and can obtain images with a clear polarized pattern.Furthermore,the detecting accuracy is better than 0.237 5（3σ） gray level（8 bits） for light intensity and average time-consuming is 3.02 s for every measuring point.These results demonstrate that the system has higher detecting efficiency and can execute an efficient detection of skylight polarized pattern.

关 键 词：天空光偏振模式 Rayleigh散射 偏振光测量 偏振导航 

分 类 号：P415.3[天文地球—大气科学及气象学] TP212[自动化与计算机技术—检测技术与自动化装置]