摘要
基于蒙特卡罗(Monte Carlo)方法建立了非视线光传输多次散射模型,引入大气光传输系统脉冲响应峰值大小,定量计算了单次散射近似研究非视线光传输时的误差大小。结果表明:大气吸收系数ka对误差影响较小,误差随大气散射系数ks和非视线传输光程S的增大而增大;当P值(ks×S)>3时,由于多次散射作用明显,误差>80%;当P<3时,误差随P值减小而减小,P<0.3时,误差<10%,此时单次散射近似可用来研究散射大气中非视线光传输问题。
The Non-Line-of-Sight (NLOS) light propagation model based on Monte Carlo (MC) method was described. Comparing with the pulse response function simulated by MC method, the error of NLOS light propagation based single-scattering approximating model was analyzed. The results show that the influence of the scattering coefficient ks and NLOS light propagation path S on the error is larger than that of absorption coefficient ks ; when P (ks× S) is greater than 3, as the multiple-scattering effect is in the primary place,the error is greater than 80%; the error decreases with the decreasing P when P is littler than 3, especially, the error is below 10% when P is litter than 0.3, and then singlescattering model is suitable for studying NLOS light propagation in scattering atmosphere.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2007年第1期40-44,共5页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.10377018No.60607013)
关键词
大气光学
单次散射
蒙特卡罗法
非视线光传输
atmosphere optics
single-scattering
Monte Carlo method, Non-Line-of-Sight (NLOS)light propagation
作者简介
贾红辉(1979-),男,贵州人,国防科技大学在读博士生,主要研究方向为紫外光大气传输技术。E-mail:ji—ahh@nudt.edu.cn;jiahonghui_9013@yahoo.com.cn
常胜利(1970-),男,河南人,博士,副教授,主要研究方向为紫外光学技术及信息光学。E-mail:slchang@nudt.edu.cn