激光主动照明光学系统设计

为提高跟踪测量系统对暗弱目标的探测能力,设计一套自动化激光主动照明光学系统,对跟踪测量视场范围进行主动辅助照明。该系统在0.2~5 km距离处的照明直径均为10 m,计算出其在-20℃及+45℃的温度调焦量,照明仿真结果表明系统照明不均匀性15%。通过研究系统像差对照明均匀性的影响,以及对设计的调光组进行分析,得到调光组移动量与照明距离之间的理论关系,表明自动调节调光组位置即可实现不同照明距离处的均匀照明。设计和分析结果表明,该主动照明系统能够自动调节调光组位置,实现跟踪测量视场内的均匀照明,有利于跟踪测量系统对于暗弱目标的探测。

Design of laser active illumination optical system

In order to improve detection ability of tracking system for the dim target, a set of automatic laser active illumination system is designed for actively illuminating the view field of tracking and measurement. The illumination diameter is always 10 meters at a distance of 0.2 km to 5 km away from the system. The amount of focusing group movement at -20℃ and 45℃ is given. The simulation results show that the illumination nonuniformity is less than 15%. By analyzing the optical aberration effects on the illumination uniformity and designed dimming group, the theoretical relationship between the dimming group movement and the illumination distance is gotten. The design result shows that the illumination in different distances will be uniform by adjusting the dimming group position automatically. The design and analysis results show that laser active illumination system can accomplish uniform illumination for the view field of tracking and measurement by moving the dimming group, which is beneficial for the dim target detection and measurement.