像素融合方法的红外双波段目标模拟器设计

Design of infrared dual-band target simulator based on pixel fusion method

提出了一种基于像素融合法的双波段红外目标模拟器设计方案。方案采用双波段亚波长光栅代替光学薄膜作为滤光片,仅使用了一套景象生成器和投影系统完成双波段红外目标模拟。该方案解决了传统双波段红外目标模拟器结构复杂,生产成本大,能量比无法调谐的问题。首先介绍了该设计方案的工作原理并说明了其可行性,然后基于严格耦合波理论分析了不同参数下亚波长光栅的滤波特性,最后根据双波段探测需求完成了光栅设计。

A method based on pixel-based fusion method was proposed for infrared dual-band target simulator. The dual-band subwavelength grating instead of optical thin film was used as a filter, only a set of scene generator and projection system was used to complete the dual-band infrared target simulation. This method solved the traditional dual band infrared target simulator ′ s problem of relatively complex structure, high cost and untunable energy ratio. Firstly, the working principle of the method was introduced and its feasibility was illustrated. Then, based on the rigorous coupled-wave theory,subwavelength grating filter′ s characteristics under different parameters were analyzed. Finally, the design of grating was completed according to the dual wavelength detection needs.