经过大气传输的红外热像仿真  

Simulation of infrared thermal image through atmospheric transmission

作　　者：邢强[1] 任海刚[1] 陈汉平[1] 徐杲[2] 刘玉峰[2] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030 [2]中国船舶工业集团总公司系统工程部,北京100036

出　　处：《红外与激光工程》2007年第1期43-46,共4页Infrared and Laser Engineering

摘　　要：大气传输特性对成像红外和目标识别研究具有重要意义。在“漫射灰体”的假设条件下,忽略传输路径上的气温变化,给出了大气传输计算的数值方程,并分析了使用等效黑体辐射光谱分布代替目标有效辐射光谱分布进行大气传输计算的可行性及其带来的误差。结果表明,在8～12μm波段,使用等效黑体辐射光谱分布进行大气传输计算已经具有足够的精度,并且可以大大节约计算时间;但是在3～5μm波段,反射太阳辐射对目标表面辐射光谱分布的影响不可忽视,使用等效黑体辐射光谱分布进行大气传输计算将带来较大的偏差。It is important to study atmospheric transmissioin for infrared imaging and object recognition. On the assumption that the surface is diffusion gray-body, and the temperature difference can be ignored in air path, a numerical expression is derived for atmospheric transmission. On this basis, the feasibility of replacing object＇s spectral radiance with equivalent black-body＇s spectral radiance in atmospheric transmission computation is analyzed. The results show that in atmospheric transmission computation of 8-12μm, object＇s spectral radiance can be treated as its equivalent black-body＇s spectral radiance with enough precision, which may reduce the load of computation greatly. While in 3-5 μm, the impact of sun radiation on objcet＇s spectral radiance can not be ignored, it brings large deviation by using equivalent black-body＇s spectral radiance in atmospheric transmission computation.

关 键 词：大气传输 红外仿真 舰船红外热像 

分 类 号：TK124[动力工程及工程热物理—工程热物理]