摘要
研究了大气分子和云雾粒子对入射激光的吸收与散射效应.采用Kruse模型、单次散射近似法和蒙特卡洛法计算了谱分布参量不同的三种云雾对0.86μm波长激光的消光特性,结果表明:能见度小于0.5km时,Kruse模型不再适用于云雾消光系数的计算;能见度相同时,消光系数的单次散射近似结果大于蒙特卡洛的仿真结果,导致传输距离相同时,云雾对0.86μm波长激光透过率的单次散射近似结果小于蒙特卡洛的仿真结果;同一能见度下谱分布参量不同的三种云雾,消光特性的差别较小,云雾粒子尺度分布对消光特性的影响不明显.
The absorbing and scattering of laser beam by air molecules and fog particles were studied.Kruse model,single scattering approximation and Monte-Carlo simulation were adopted to calculate the extinction characteristics of three types of fog irradiated by near infrared laser of 0.86μm wavelength,the results show that Kruse model is not applicable to calculate the extinction coefficient when the visibility is lower than 0.5km.The extinction coefficient from the single scattering approximation with lower precition is larger than that from the Monte-Carlo simulation in the same visibility,which means a lower transmission at the same distance.The difference of extinction characteristic of three types of fog is so small in the same visibility that the influence of the size distribution of fog particle on it is not obvious.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2015年第11期159-165,共7页
Acta Photonica Sinica
基金
The Science and Technology innovation Foundation of China Airborne Missile Academy(No.201308S04)
关键词
激光传输
云雾
消光特性
蒙特卡洛
能见度
Laser transmission
Fog
Extinction characteristic
Monte-Carlo
Visibility
