中国激光, 2018, 45 (12): 1204005, 网络出版: 2019-05-09
角反射器对调制偏振光的偏振响应研究 下载: 950次
Polarization Response of Retroreflector to Polarization-Modulated Light
测量 激光测距 偏振响应 调制偏振光 角反射器 measurement laser ranging polarization response polarization-modulated light retroreflector
摘要
偏振调制测距方法利用往返调制偏振光传递待测距离相位信息,角反射器作为其合作目标,其对调制偏振光的偏振响应会影响系统性能。为研究该响应,提出调制偏振光的复信号描述方法,在测量系统的全局坐标系下,结合偏振传递参数获得反射调制偏振光的复信号表示。分析了正入射时未镀膜实心(BK7)和空心(Au膜层)角反射器对调制偏振光的偏振响应特性;比较三种常用金属膜层对调制偏振光的保偏性能,并分析角反射器姿态角对保偏特性的影响。计算结果表明:Ag膜层对调制偏振光的保偏性能优于Au膜层和Al膜层;全局坐标系下调制偏振光振幅比受偏摆角影响显著,相位延迟受俯仰角影响显著。研究结果可为偏振调制测距系统的优化设计提供理论指导。
Abstract
The polarization modulation ranging method uses the polarization-modulated light to transmit the measured distance phase information and the polarization response of the retroreflector as its cooperative target affects the system performance. In order to study this response, a complex signal description method of polarization-modulated light is presented. In the global coordinate system, the complex signal representation of reflected polarization-modulated light is obtained with the polarization transfer parameters. Under normal incidence, the polarization responses of uncoated solid (BK7) and hollow (Au film) retroreflectors to polarization-modulated light are analyzed, the polarization-preservation performances of three kinds of common metal coatings to the polarization-modulated light are compared, and the influence of attitude angle of the retroreflector on the polarization-preservation properties is analyzed. The calculation results show that the polarization-preservation performance of Ag film is better than those of Au film and Al film. In the global coordinate system, the amplitude ratio of polarization-modulated light is significantly affected by the deflection angle, and the phase delay is significantly affected by the pitching angle. These results can provide a theoretical guidance for the optimal design of a polarization modulation ranging system.
高书苑, 石俊凯, 纪荣祎, 黎尧, 周维虎. 角反射器对调制偏振光的偏振响应研究[J]. 中国激光, 2018, 45(12): 1204005. Shuyuan Gao, Junkai Shi, Rongyi Ji, Yao Li, Weihu Zhou. Polarization Response of Retroreflector to Polarization-Modulated Light[J]. Chinese Journal of Lasers, 2018, 45(12): 1204005.