光学学报, 2018, 38 (11): 1123001, 网络出版: 2019-05-09
地基光电探测中曝光时间影响分析 下载: 946次
Analysis on Influence of Exposure Time in Ground-Based Photoelectric Detection
光学器件 空间目标 曝光时间 地基光电探测系统 探测能力 optical devices space target exposure time ground-based photoelectric detection system detection ability
摘要
地基光电探测系统是获取空间目标信号的重要探测手段,而曝光时间是影响其探测性能的主要参数。以空间目标的光学特性为基础,计算出系统的极限探测距离、最小可探测尺寸和极限探测星等,分析了其与曝光时间等影响因素的定量关系。结合空间目标的像移模型,得到动态条件下,系统探测能力随曝光时间的变化关系,并进行仿真研究。研究结果表明:目标相对静止时,系统探测能力随曝光时间延长而增加,变化趋势趋于平缓;目标相对运动时,系统探测能力随曝光时间延长先增加后减小,并存在一个最优曝光时间,且与目标相对角速度有关。仿真结果可为地基光电探测系统曝光时间的设定提供一定的优化可行性。
Abstract
Ground-based photoelectric detection system is an important detection method for signal acquisition of space targets, and exposure time is the main parameter affecting its detection performance. Based on the optical properties of the space target, limit detection distance, minimum detectable size and limit detection star of the system are calculated, and the quantitative relationship between the exposure time and other influencing factors is analyzed. Combined with the image shift model of the space target, the relationship between the system detection ability and the exposure time under dynamic conditions is obtained, and a simulation study is conducted. The results show that the system detection capability increases with the exposure time and becomes stable when the target is relatively stationary. When the target is in relative motion, the system detection capability increases firstly and then decreases with the extension of the exposure time, and there is an optimal exposure time related to the target relative angular velocity. The simulation results can provide optimization feasibility for the exposure time setting of ground-based photoelectric detection system.
曾海瑞, 孙华燕, 张廷华, 杨彪. 地基光电探测中曝光时间影响分析[J]. 光学学报, 2018, 38(11): 1123001. Hairui Zeng, Huayan Sun, Tinghua Zhang, Biao Yang. Analysis on Influence of Exposure Time in Ground-Based Photoelectric Detection[J]. Acta Optica Sinica, 2018, 38(11): 1123001.