针对当前偏振成像方法的实时性不好、能量利用率低以及分辨率不高等问题, 提出了一种非共轴四通道偏振成像方法。该方法通过4个通道采集不同偏振方向的图像来融合计算偏振度图像。数值仿真分析了影响系统偏振成像结果的通道间距、通道平行度和偏振片检偏角度误差, 得出了满足偏振成像精度达到1%的系统参数容限。在实验研究方面, 研制出了非共轴四通道的偏振成像系统, 并对室外距离约为50 m的车辆进行了实验。实验证明了该系统可以有效地对目标进行偏振成像。

The current polarization imaging method has the problems of poor real-time performance, low energy utilization rate and low resolution. We proposed a four-channel polarization imaging method of non-coaxial type. The method used four channels to acquire images of different polarization directions to fuse the degree of polarization image. After that, we simulated parameters such as channel spacing, channel parallelism and polarization detection angle error affecting the polarization imaging results of the system, and gave the parameter tolerance meeting the polarization imaging accuracy of 1%. Furthermore, we developed a four-channel polarization imaging system of non-coaxial type, and conducted the experiment for vehicles 50 m away outdoors. The experimental results verify that the system can effectively provide the polarization imaging for target.