红外热成像系统传递函数的测试研究
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摘要
调制传递函数(MTF)是评价红外热成像系统性能的一个重要参数。本文分析了常用的MTF测试方法,并对其中倾斜刀口法的测试系统构成、测试原理、测试步骤进行了详细的介绍,最后通过Matlab实现倾斜刀口法测试MTF的方法,并使用该测试方法对某国产凝视热像仪进行了测试,其测试结果与国外某测试设备的测试结果最大相差0.04。
The modulation transfer function(MTF) is a important parameter to evaluate infrared thermal imaging system's performance. This paper analyzes common MTF test methods and especially introduces measure system composition,measure principle,measure steps related to tilted edge method in detail. Finally the method of tilted edge is implemented by using Matlab program. Certain domestic staring thermal imager is measured by using this method and HGH IR system,the maximum difference between two measurement results is 0.04.
The modulation transfer function(MTF) is a important parameter to evaluate infrared thermal imaging system's performance. This paper analyzes common MTF test methods and especially introduces measure system composition,measure principle,measure steps related to tilted edge method in detail. Finally the method of tilted edge is implemented by using Matlab program. Certain domestic staring thermal imager is measured by using this method and HGH IR system,the maximum difference between two measurement results is 0.04.
引文
[1] ZHANG Jianqi,WANG Xiaorui.Photo-electricity imaging system modeling and performance evaluating theory [M].Xi′an:Publishing House of Xidian University,2010.
[2] LI Xudong,XI Weisheng,HU Tieli,et al.Research on MTF measurement for thermal imaging systems [J].Journal of Applied Optics,2006,27(4):323-326.(in Chinese)李旭东,惠渭生,胡铁力,等.红外热成像系统调制传递函数(MTF)测试研究[J].应用光学,2006,27(4):323-326.
[3] XU Hang,LI Chuanrong,LI Xiaohui,et al.An optimized knife-edge algorithm for on-orbit MTF estimation[J].Remote Sensing Information,2012,27(6):10-16.(in Chinese)徐航,李传荣,李晓辉,等.一种优化的刃边法MTF在轨评估算法[J].遥感信息,2012,27(6):10-16.
[2] LI Xudong,XI Weisheng,HU Tieli,et al.Research on MTF measurement for thermal imaging systems [J].Journal of Applied Optics,2006,27(4):323-326.(in Chinese)李旭东,惠渭生,胡铁力,等.红外热成像系统调制传递函数(MTF)测试研究[J].应用光学,2006,27(4):323-326.
[3] XU Hang,LI Chuanrong,LI Xiaohui,et al.An optimized knife-edge algorithm for on-orbit MTF estimation[J].Remote Sensing Information,2012,27(6):10-16.(in Chinese)徐航,李传荣,李晓辉,等.一种优化的刃边法MTF在轨评估算法[J].遥感信息,2012,27(6):10-16.