红外成像系统噪声等效温差参数测试算法及应用研究  

NETD Test and Implement for Thermal Imaging System

作　　者：刘收[1] 杨旸[1] 周龙[1] 杨广志[1] 万英[2] 

机构地区：[1]北京航天测控技术有限公司,北京100041 [2]华北光电技术研究所,北京100015

出　　处：《计算机测量与控制》2015年第3期975-978,共4页Computer Measurement &Control

基　　金：总装预研项目(5131702014)

摘　　要：噪声等效温差(NETD)是表征红外成像系统灵敏度的关键参数,也是评估红外成像系统性能的重要参数之一,应用广泛。通过对红外成像系统3D噪声、信号传递函数(SiTF)、NETD等参数测试方法、算法和流程研究,给出一种基于视频文件的3D噪声离线对比测试方法和一种SiTF线性区自动判断计算斜率算法,在此基础上针对某型技术保障装备国产化光电检测平台开发了配套应用软件功能模块;实现了通过计算单位均方根噪声所对应的SiTF斜率值,分析得出系统NETD参数值的功能;以某型热像仪为被测对象,开展了测试结果重复性和一致性试验,并与I-SITE红外整机测试系统进行了对比测试;实验结果表明开发的NETD参数测试功能模块测试精度和重复性满足设计要求,具有较高实用价值,已进行了工程应用。Noise equivalent temperature difference （NETD） is the key parameters which characterize sensitivity of the infrared imaging systems, and also one of the most important parameters to evaluate performance of infrared imaging equipment. In this paper, a method to calculate NETD based on 3-D noise model is carried out. According to this method, a suite of software to test NETD of infrared imaging equipments has been developed, then some experiments on different infrared imaging system was done. The results of experiments showed that the method could satisfy the designing requests on both testing and repeating precision.

关 键 词：噪声等效温差 信号传递函数 三维噪声 红外成像系统 

分 类 号：TN214[电子电信—物理电子学]