利用NETD评估红外系统探测距离的方法研究  

Research on the Method of Using NETD to Evaluate the Detection Range of Infrared System

作　　者：王小兵 贾国伟[1,2] 洪普 WANG Xiao-bing;JIA Guo-wei;HONG Pu(Huazhong Institute of Electro-Optics-Wuhan National Laboratory for Optoelectronics,Wuhan 430223,China;Hubei Jiuzhiyang Infrared System Co.,Ltd.,Wuhan 430223,China)

机构地区：[1]华中光电技术研究所-武汉光电国家研究中心,湖北武汉430223 [2]湖北久之洋红外系统股份有限公司,湖北武汉430223

出　　处：《光学与光电技术》2020年第2期32-37,共6页Optics & Optoelectronic Technology

摘　　要：红外系统的探测距离是光电系统的关键指标之一,决定了系统的整体性能。在实验室条件下评估红外系统的探测距离,不受天气、场地限制,具有实际意义。从探测器的输出信号与黑体目标温度的关系着手,推导了NETD的表达式,用NETD表达了小哈德逊公式,并验证了该公式的正确性,用该方法推导的指标与理论计算指标的误差在10%以内,证明了该方法的可行性。The detection range of the infrared system is one of the key indexes of the photoelectric system,which determines the overall performance of the system.It is practical significance to evaluate the detection range of infrared system under laboratory conditions,which is not limited by weather or site.In this paper,starting from the relationship between the output signal of the detector and the target temperature of the blackbody,the expression of NETD is derived,the little Hudson formula is expressed by NETD,and the correctness of the formula is verified.The error between the index derived by this method and the theoretical calculation index is within 10%,which is feasible in practice.

关 键 词：噪声等效温差 红外系统 探测距离 推导 评估 

分 类 号：TN215[电子电信—物理电子学]