Compared with the impulse LiDAR, the single-photon LiDAR has higher measurement sensitivity in the prominent feature, especially for space-based long-distance imaging. The distance measurement and the detection probability are the critical performance for LiDAR. The ranging of single-photon LiDAR is mainly different from the photon ranging of pulsed LiDAR. Dead time has a significant effect on distance measurement accuracy and detection probability, which are key parameters for detectors when implementing sound control. Therefore, the model of detector dead time, measurement accuracy, and detection probability should be established, and simulation results that meet application requirements should be achieved. Based on the single-photon ranging theory, the dead time, measurement accuracy, and detection probability model of single-photon LiDAR are studied. Furthermore, the systematic simulation of different contrasts is carried out according to the model. The simulation results demonstrate that the model can accurately perform the relationship between dead time and single-photon LiDAR system parameters. The research results can prove the design and verification of single-photon LiDAR dead time.

中文翻译：

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具有死区时间选择的单光子 LiDAR 性能改进

与脉冲激光雷达相比，单光子激光雷达的突出特点是具有更高的测量灵敏度，特别是对于天基长距离成像。距离测量和检测概率是激光雷达的关键性能。单光子激光雷达的测距主要不同于脉冲激光雷达的光子测距。死区时间对距离测量精度和检测概率有显着影响，这是探测器在实施声音控制时的关键参数。因此，需要建立探测器死区时间、测量精度和探测概率的模型，并得到满足应用要求的仿真结果。基于单光子测距理论，死区时间、测量精度、研究了单光子激光雷达的探测概率模型。此外，根据模型进行了不同对比度的系统模拟。仿真结果表明，该模型可以准确地表现死区时间与单光子激光雷达系统参数之间的关系。研究结果可以证明单光子激光雷达死区时间的设计和验证。