基于液晶光阀的动态红外场景仿真研究

介绍了基于液晶光阀的动态红外场景仿真系统构成,分析了液晶光阀的波长变换和空间调制机理。对反映红外场景仿真效果主要因素(光谱输出特性、时间响应特性和空间分辨力)进行了理论分析和研究。利用优化设计液晶光阀参数构建的动态红外场景仿真样机,测量其光谱输出特性、时间响应特性和空间分辨力,结果表明,仿真系统的输出光谱可覆盖中波和长波红外波段,可实现帧频70Hz,系统空间分辨力优于10 lp/mm(受红外光学系统和红外热像仪分辨力限制)。

Research on IR Scene Simulation Based on LCLV

The IR scene simulation system based on IR LCLV(Infrared Liquid Crystal Light Valve)is described.The principle of wave transform and signal modulation of IR LCLV is analysed.The main factors(output spectrum characteristics,time response characteristics and spatial resolution) influence on IR simulation effect are analysed theoretically.An IR scene simulation system is constructed with optimized parameters of IR LCLV.The output spectrum and time response and resolution of the system are tested.The results show the output spectrum can be extended to a range of MW and LW,the frame frequency of 70Hz is achieved,and the spatial resolution is better than 10lp/mm(limited by the resolution of IR optical lens and IR imageing system).