现代红外成像系统理论性能仿真  

The Oretical Simulation of System Performance for Modern Infrared Imagers

作　　者：乔宣霖 陈蔚[1] 安晓强[1] 王茜[1] 任驹 贾静[1] 张艺蓝 代俊[1] QIAO Xuanlin;CHEN Wei;AN Xiaoqiang;WANG Qian;REN Ju;JIA Jing;ZHANG Yilan;DAI Jun(Southwest Institute of Technical Physics,Chengdu 610041)

机构地区：[1]西南技术物理研究所,成都610041

出　　处：《飞控与探测》2024年第5期87-92,共6页Flight Control & Detection

摘　　要：红外光学系统通过感测物体和背景之间的温差,提供了昼夜寻找目标的能力。最小可分辨温差(Minimum Resolvable Temperature Difference,MRTD)可以评估红外光学系统的性能。使用基于第三代探测器噪声等效温差(Noise Equivalent Temperature Difference,NETD)的数学表达式对MRTD进行了数值模拟。根据改进的约翰逊准则对红外光学系统的可探测距离进行预测,并对制冷红外光学系统的MRTD进行测量。对实际测量与理论模拟进行比较,结果表明它们之间具有很高的一致性。Infrared optical systems provide the capability of finding a target,day and night,by sensing the temperature difference between the object and the background.Therefore,the minimum resolvable temperature difference(MRTD)can assess the performance of infrared optical systems.Herein,we present the numerical simulation of MRTD using the 3rd generation of mathematical expression of noise equivalent temperature difference(NETD).The range prediction of the system is also demonstrated based on modified Johnson criteria.MRTD of a cooled infrared optical system is measured to compare the practical situation with the theoretical simulation.The result shows a high consistency between them.

关 键 词：最小可分辨温差 噪声等效温差 距离预测 红外光学系统 

分 类 号：TN215[电子电信—物理电子学]