帧积分时间对微光电视观察视距的影响  

Influence of the Frame Integral Time to Detecting Distance of Low Light Level-TV

作　　者：朱莹[1] 常本康[2] 刘磊[2] 

机构地区：[1]中国人民解放军理工大学理学院,江苏南京210007 [2]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《中国激光》2008年第2期259-262,共4页Chinese Journal of Lasers

摘　　要：微光成像系统在现代军事上起着越来越重要的作用,成像系统的探测视距一直是人们关注的焦点。分析了视距探测方程,提出了一种适用于慢运动目标的增大探测视距的方法——增加帧积分处理时间。基于修正的微光成像公式,从理论上分析了增加帧积分处理时间对于微光电视探测距离的影响,通过计算机模拟了不同照度下不同帧积分时间对探测视距大小的影响,例如四帧累加时:在10-4lx时,探测距离提高了1.57倍;在10-3lx时探测距离提高了1.31倍。通过在低照度下的现场实验数据验证了这种方法的可行性,证明增加帧积分时间对提高视距有很大的作用。The low light level （LLL） night vision system now plays a more important role in military affairs, and people always focus it on the detecting distance. This thesis analyzed the diatance detecting equation, and brought forward a new way to increase the detecting distance suitable for low speed object. This method is multiplying the frame integral time. Based on the revised apparent distance detecting equation, the affect of the frame accumulation to the detecting distance was studied. The influence of the frame accumulation on the detecting distance at different illumination intensities was analyzed theoretically. At about 10^-4 Ix and 10 a Ix, it can raise the distance to 157% and 131%0, respectively. The field experiment at weak illumination showed that this method was effective.

关 键 词：光电子学 微光夜视系统 视距探测方程 帧积分时间 

分 类 号：TN223[电子电信—物理电子学]