红外双波段目标模拟器方案与光学系统设计

通过对传统双波段目标模拟器的工作原理进行分析，针对其结构复杂以及生产成本较大的问题，提出一种只使用一套景象生成器和投影系统的双波段目标模拟器设计方案。利用分振幅的方法，通过滤光片和遮光片的遮挡滤光作用使2个波段的能量按特定的比例透过，在特定的积分时间下，探测器探测到2个波段的能量比不同，以此模拟不同红外目标。对设计方案中的投影系统进行光学设计，光学系统属于透射式，工作波段在3.3 m~3.8 m和4.4 m~4.8 m，F数为3.2，半视场角为1.1，系统分辨率达到10 lp/mm，对300 K~3 000 K的黑体、灰体或选择体均可实现红外目标的模拟，同时模拟器产生的辐射能量也大于探测器探测到的最小能量，设计方案可行。

Design for scheme of infrared dual-band target simulator and projection optical system

Through the analysis of the traditional dual-band target simulator, a target simulator using only one generator and one projection system was put up to solve the problem of high cost and relatively complex structure. Using the method of division of amplitude, by the filtration of the filter and shading sheet, the energy of the two bands could transmit according to a specific proportion ,and in the specific integral time, detector could detect different energy ratios of the two bands, which could be used to simulate different infrared targets.Futhermore, the optic design of the projection system in the scheme was conducted.The projection system uses transimission model,which works in 3.3 m~3.8 m/4.4 m~4.8 m with a half field of view of 2.2 and an F number of 3.2 ,the system resolution could reach 10 lp/mm. The improved simulator can simulate the infrared objects of black body ,gray body,even selective body （300 K~3 000 K），with the radiation energy larger than the detected minimum energy ,proving scheme feasible .