红外目标探测距离的估算

红外热成像系统探测距离的估算,对于提高红外系统设计水平,降低成本,缩短研制和生产周期都有非常重要的作用.但是探测距离受很多因素,如目标特性,大气传输、热成像系统参数等的影响,这使得红外热成像系统探测距离的估算难度大大增加.传统的红外作用距离估算一般是将大气透过率视为常数的,这会带来很大的误差.本文考虑了大气气溶胶模式下大气透过率随环境的改变,给出了更为具体的红外目标探测距离的表达式.通过编制程序和查找相关数据,计算了热成像系统对点源和扩展源的探测距离.

Estimation of the Detection Distance of Infrared Target

Estimation of the detection distance of an infrared imaging system is of great importance to the design level improvement,cost reduction and development and production period shortening for infrared systems.However,the detection distance can be affected by many factors such as the characteristics of a target,the transmission in atmosphere,the parameters of the thermal imaging system and etc..These make the estimation of the detection distance of an infrared imaging system be very difficult.The traditional estimation method of the infrared detection distance generally considers the atmospheric transmission coefficient as a constant.This will result in a great error.In this paper,the variation of the atmospheric transmission coefficient with the environment in the atmospheric aerosol mode is considered and a more detailed expression of the detection distance from a target is given.By programming and searching for the relevant data,the detection distances of an infrared imaging system against a point source and a extended source are calculated.