激光对红外系统的失效机理和破坏效应研究

 根据红外光学系统的会聚特性，用光学增益方法分析了红外系统中各元件对应的光强分布，确定了位于焦面附近光学元件是激光破坏的易损部件，并提出了强激光对红外系统元件损伤,造成其探测、制导功能失效的硬破坏机理；由红外滤光片、探测器和信号处理电路与入射激光波长的光谱响应分析，提出了弱激光对红外系统干扰，导致其探测、制导功能在激光辐照一段时间内失效的软破坏机理；开展了激光辐照红外系统的失效验证实验，较好地解释了其失效的机理和效应。

Failure mechanism and damage effects of IR systems irradiated by laser beams

According to characteristics of IR systems, the intensity distribution of an optical element in IR system is analyzed by optical gain. The optical element at focus plane is damageable element by laser. The damage mechanism of the detection and guidance functions of the IR system from the damage of optical element radiated by high power laser is presented. Based on the analysis on the spectrum responding characteristics analyzed by IR filter, detector and signal processing electrocircuit, the soft damage mechanism of resulted output signal disturbance in IR system radiated by low power laser, and the detection function disability in laser radiation time caused by laser are presented. The validate experiment of disability in IR system radiated by laser has been developed, the invalidation mechanism and damage effects in IR system have been preferably explained.