Chen Yafeng, Yin Kaixin, Shi Dongfeng, Yang Wei, Huang Jian, Guo ZIjun, Yuan Kee, Wang Yingjian
Appl Opt. 2022 Aug 10;61(23):6905-6914. doi: 10.1364/AO.465202.
Single-pixel imaging (SPI) is a new technology with many applications and prospects. Polarization detection technology can improve the detection and identification ability of the imaging system. A near-infrared polarization SPI lidar system is designed to realize detection and polarization imaging of outdoor long-range targets. The depth, intensity, linear polarization, and polarization degree images of typical remote targets are obtained. The results show that the polarization image contains many details and contour information of the target, and the intensity image contains brightness and reflectivity information. Intensity and polarization information complement each other. The characteristics of intensity and polarization images at different spatial frequencies are analyzed for the first time, to our knowledge, by taking advantage of the Fourier modulation mode. We found that the proportion of high-frequency information in the polarization image is much higher than that of the intensity image. The sampling strategy of collecting only low-frequency components is applicable in intensity imaging but needs further improvement in polarization imaging. The polarization SPI lidar system can enrich the target information acquired, improve imaging contrast, and have significant application value for target detection and identification in complex backgrounds.
单像素成像（SPI）是一项具有众多应用和前景的新技术。偏振探测技术可以提高成像系统的探测和识别能力。设计了一种近红外偏振SPI激光雷达系统，以实现对室外远程目标的探测和偏振成像。获得了典型远程目标的深度、强度、线偏振和偏振度图像。结果表明，偏振图像包含目标的许多细节和轮廓信息，强度图像包含亮度和反射率信息。强度和偏振信息相互补充。据我们所知，首次利用傅里叶调制模式分析了不同空间频率下强度和偏振图像的特征。我们发现，偏振图像中高频信息的比例远高于强度图像。仅收集低频分量的采样策略适用于强度成像，但在偏振成像中需要进一步改进。偏振SPI激光雷达系统可以丰富获取的目标信息，提高成像对比度，对复杂背景下的目标探测和识别具有重要的应用价值。
