基于红外目标模拟器动态校准系统的应用场景, 分析了动态校准系统光学系统的设计特点, 指出光学系统应选择折反式二次成像光路结构。基于经典的光学系统无热化原理, 以光机材料精密搭配与计算为基础细化了该折反式光学系统的无热化方法, 基于该方法设计了F/2、焦距370 mm、工作波段3.7~4.8 ?滋m、总长为182 mm的光学系统, 光学系统采用512×512、15 ?滋m×15 ?滋m规格的斯特林制冷式探测器, 光学系统在-40~60 ℃范围内成像质量接近衍射极限。建立了光学系统鬼像和冷反射分析模型, 分析结果表明: 光学系统杂散光抑制能力较强、性能优异, 满足红外目标模拟器动态校准系统在复杂恶劣环境下的使用要求。

Based on application scenarios of infrared target simulator dynamic calibration system, the design characteristics of the optical system in dynamic calibration system were analyzed, then it was pointed out that the optical system should select the refraction-reflective secondary imaging optical structure. Based on the classical optics athermal principle, refraction-reflective system athermal methods was refined by calculating then matching the optics and machine material precisely. By the method, a optical system with F/2, focal length of 370 mm, working band of 3.7 to 4.2 ?滋m, total length of 182 mm was designed. The optical system selected 512×512, 15 ?滋m×15 ?滋m specification Stirling refrigeration detector, and imaging quality in the -40-60 ℃ was close to the diffraction limit. The ghost and Narcissus analysis models were established, the results show that the optical system has strong ability to suppress stray light and others excellent performance. The optical system satisfies the requirement of dynamic calibration system of infrared target simulator used in complex harsh environment.