摘要
微光夜视整机可以在夜间光照条件较差的情况下,对目标实施有效观察,而夜间观察目标对比度是整机作用距离影响因素中的重要指标。为满足微光夜视整机夜间观察理论分析及试验对目标对比度数据的迫切需求,基于三代微光像增强器具有与星光条件下自然光辐射光谱良好匹配的使用特性,搭建了基于三代微光ICCD的成像装置。并从微光成像系统的能量传递链及光电子成像系统的视觉特征方程分别推导环境光照度和目标-背景反射率比与对比度关系。在暗室和夜天光条件下开展了对比度试验,试验结果证明,当照度处于三代微光像增强器照度-亮度的线性相关照度区间[Es, Em]时,对比度与照度无关;对同一目标及背景采集图像,目标-背景反射率越接近1,对比度越小。
The low-level-light(LLL)night vision machine can effectively observe the target under the poor illumination conditions at night,and the target contrast observed at night is an important indicator of the influence factors of the whole operating distance.In order to meet the urgent need of target contrast data for night observation theoretical analysis and test of LLL night vision machine.Based on the use characteristics of the 3rd generation LLL image intensifier with good matching with the natural light radiation spectrum under starlight conditions,an imaging device based on the 3rd generation LLL ICCD is built.From the energy transfer chain of LLL imaging system and the visual characteristic equation of optoelectronic imaging system,the relationship between the ambient illumination,with the target-background reflectance ratio and the contrast is deduced respectively.The contrast test was carried out in dark room and natural night conditions.The test results show that when the illuminance is in the linear correlation illuminance interval[Es,Em]of the third generation LLL image intensifier,the contrast has nothing to do with the illuminance;for the same target and background,the target-background reflectance is closer to 1,the lower the contrast is.
作者
陈旭浪
党小刚
郭欣达
王磊
张姝丽
拜晓锋
韩坤
袁渊
李军国
成伟
CHEN Xulang;DANG Xiaogang;GUO Xinda;WANG Lei;ZHANG Shuli;BAI Xiaofeng;HAN Kun;YUAN Yuan;LI Junguo;CHENG Wei(Key Laboratory of Science and Technology on Low-Level-Light Night Vision,Xi’an 710065,China;Kunming Institute of Physics,Kunming 650223,China;Military Representative Office of Air Force Equipment Division in Kunming,Kunming 650223,China)
出处
《应用光学》
CAS
CSCD
北大核心
2020年第6期1241-1246,共6页
Journal of Applied Optics
基金
微光夜视技术重点实验室基金(BQJJ-2018-004)。
关键词
微光
ICCD
对比度
像增强器
low-level-light
ICCD
contrast ratio
image intensifier
