基于单光子探测的目标光学散射特性研究

Research on optical scattering characteristics of targets based on single photon detection

研究了目标物体的单光子散射回波特性,基于红外单光子探测器和皮秒激光器搭建了目标光学散射特性测量系统,以回波光子数作为单光子条件下目标光学散射特性的表征。实验研究了不同形状(球体、立方体、圆柱体、圆锥体)目标物体的单光子散射特性,并利用双向反射分布函数模型对实验结果进行拟合,理论拟合结果与实验测量结果能够很好地吻合。进一步对不同材质(瓷砖、木材、外墙砖)目标物体的单光子散射特性进行了研究,并将实验结果与传统波动散射特性进行了对比分析。该研究为单光子激光雷达远距离目标识别与探测的相关工作提供了参考。

The single photon scattering echo characteristics of targets were studied in this paper. An optical scattering characteristic measurement system was built based on infrared single photon detector and picosecond laser. The number of echo photons was used to characterize the optical scattering characteristics under the condition of single photon detection. In this experiment, the single photon scattering characteristics of targets with different shapes(sphere, cube, cylinder and cone) were studied. And the results were fitted by using the bidirectional reflection distribution function model. The experimental results were in good agreement with the theoretical fitting ones. Further, the single photon scattering characteristics of targets with different materials(ceramic tile, wood and wall brick) were studied, which were compared with the traditional wave scattering characteristics. This study provides a reference for the long-range target recognition and detection of single photon lidar.