亮度增益对基于像增强器的目标背景对比度影响  

Influence of Brightness Gain on the Object-Background Contrast of an Image Intensifier

作　　者：苏悦 拜晓锋 党小刚 冯丹青 程宏昌 李周奎 韩坤 SU Yue;BAI Xiaofeng;DANG Xiaogang;FENG Danqing;CHENG Hongchang;LI Zhoukui;HAN Kun(Kunming Institute of Physics,Kunming 650223,China;Science and Technology on Low-Light-Level Night Vision Laboratory,Xi’an 710065,China)

机构地区：[1]昆明物理研究所,云南昆明650223 [2]微光夜视技术重点实验室,陕西西安710065

出　　处：《红外技术》2022年第4期383-388,共6页Infrared Technology

摘　　要：亮度增益为微光像增强器的重要参数,影响微光夜视环境下以微光像增强器为核心的目标背景对比度测试结果精度。本文基于对比度测试原理,通过对不同亮度增益的ICCD进行目标背景对比度测试,分析得到亮度增益与目标背景对比度的变化关系及影响因素。测试结果表明:亮度增益分别为12000 cd/(m^(2)·lx)、8300 cd/(m^(2)·lx)、6000 cd/(m^(2)·lx)时,环境照度在[2×10^(-3),8×10^(-3)](lx)区间内,目标背景对比度受亮度增益影响较小。照度在区间外时,受亮度增益影响,目标背景对比度测试结果可能失真。本文研究结果为提高ICCD目标背景对比度测试精度提供数据支持。Brightness gain is an important parameter of low-light image intensifiers.It affects the accuracy of the object-background contrast in low-light night vision environments.Based on the principle of contrast tests,this study analyzes the relationship between the brightness gain and the object-background contrast,as well as influencing factors,via the object-background contrast test on an ICCD with different brightness gains.The results show that when the brightness gain is 12000,8300,or 6000 cd/(m^(2)·lx)and the ambient illuminance is within the range of[2×10^(-3),8×10^(-3)](lx),the object-background contrast is minimally affected by the brightness gain.However,when the illuminance is outside this range,the object-background contrast test result may be distorted due to the influence of the brightness gain.The results of this study can guide the improvement of accuracy of ICCD object-background contrast tests.

关 键 词：像增强器 ICCD 目标背景对比度 亮度增益 

分 类 号：TN223[电子电信—物理电子学]