基于三通道全天域偏振成像系统太阳位置检测方法

A detecting method for the position of the sun using the full-sky three channel polarization imaging system

为了满足偏振光天文导航定位对高精度太阳空间位置信息的需求,提出了一种新型的基于大气偏振模式的三通道偏振成像系统检测太阳位置的方法。该方法是利用大气偏振模式的偏振信息去解算太阳位置。与常见的基于光斑检测的方式比较,该检测方法是利用大气偏振光属性计算太阳位置,是一种间接计算方法,该检测方法具有视场大、检测精度高等特点。光学采集系统由工业CMOS镜头、偏振片和鱼眼镜头构成。从原理出发,搭建了实验平台验证本方法。实验表明:检测装置的测量精度为0.02°,不仅能够满足检测需求,也为太阳位置检测领域提供了一种新的解决思路。

To satisfy the requirement of the polarized light celestial positioning for the high precise information of solar spatial position,a new detecting method for the position of the sun by a new three channel polarization imaging system is proposed based on atmospheric polarization mode.The method is used to calculate the position of the sun by using the polarization information of the atmospheric polarization mode.Compared with the traditional method based on spot detection,the current one is an indirect calculation method to calculate the sun position by using the polarized light characters.This method has advantages such as wide field of view and high precision.The system consists of industrial CMOS lens,polarizer and fish-eye lens.We build up an experimental platform to verify the method based on theory.The experiment shows that the measurement accuracy is 0.02°.Therefore,this method not only meets the requirement of detection,but also provides a new solution for the field of the sun position detection.