摘要
红外热像仪对目标的探测距离的计算方法已有多种,本文对基于目标与背景温差ΔT0和等效噪声温差NETD而推导出的公式进行了分析,对大气透过率aτ对ΔT0的衰减作用提出了不同的看法,并据此对基于ΔT0和NETD的热像仪探测距离公式进行了修正,对影响NETD参数的诸多因素进行了分析。在此基础上,推导出了热像仪对含有不同温度的多个红外辐射源的同一目标的距离计算公式。
A lot of computational methods have been proposed to decide the detection range of the thermal infrared imager. Analysis on the detection range equation is given,with consideration of the temperature difference between the target and the background ——△T0 and the noise equivalent temperature difference ——NETD. Novel analysis on the attenuation effect of △T0 by atmospheric transmittance -Tα is presented, after which a correction is given to the △T0-and-NETD based range equation. Study on the factors that affect the NETD parameters is also provided. Range equation of the thermal infrared imager for targets with multiple infrared radiation sources and different temperature is deduced in conclusion.
出处
《激光与红外》
CAS
CSCD
北大核心
2007年第12期1270-1273,共4页
Laser & Infrared
关键词
热像仪
热成像
红外探测
探测距离
NETD
thermal imager
thermal imaging
infrared detection
detection range
NETD
