环境温度对红外热像仪MRTD测试的影响分析  

Influence of Ambient Temperature on MRTD Test for Infrared Thermal Imager

作　　者：刘学俊 杨军[1] 王新[1] LIU Xue-jun;YANG Jun;WANG Xin(32202 Unit of PLA,Huayin 714200,China)

机构地区：[1]中国人民解放军第32202部队,陕西华阴714200

出　　处：《光学与光电技术》2021年第3期62-66,共5页Optics & Optoelectronic Technology

摘　　要：基于黑体辐射理论,结合红外热像仪成像质量评价参数——最小可分辨温差(MRTD)测试原理,建立了不同环境温度下目标背景的红外辐射量差值与温差之间的量化关系,进而提出了红外热像仪MRTD测试中的环境温度影响因子。试验结果表明:良好无热化设计的红外热像仪的MRTD与环境温度影响因子随着温度变化趋势一致,且在不同温度下的二者的比值趋同。该结论可实现温度应力下的红外热像仪成像质量评价。In this paper,based on the blackbody radiation theory and the test principle of the minimum resolvable temperature difference(MRTD),the imaging quality evaluation parameter for infrared thermal imager,the quantitative relationship between infrared radiation difference and temperature difference of the target and background at different ambient temperatures is established. And then the ambient temperature influencing factor for infrared thermal imager is proposed. The results show that the MRTD of IR thermal imager with good non-thermal design and the ambient temperature influencing factor has the same trend with the change of ambient temperature,and the ratio of the two tends to be the same at different temperatures. This conclusion can be used to evaluate the imaging quality of infrared thermal imager under temperature stress.

关 键 词：辐出度 最小可分辨温差MRTD 环境温度影响因子 目标背景温差 图像质量 

分 类 号：TN219[电子电信—物理电子学]