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国防科技大学,湖南 长沙 410073
收稿日期:2006-04-29,
修回日期:2006-10-26,
网络出版日期:2007-01-30,
纸质出版日期:2007-01-30
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贾红辉, 常胜利, 杨建坤, 等. 单次散射近似研究非视线光传输中的误差[J]. 光学精密工程, 2007,15(1):40-44.
JIA Hong-hui, CHANG Sheng-li, YANG Jian-kun, et al. Study on error of non-line-of-sight light propagation by single-scattering model[J]. Optics and precision engineering, 2007, 15(1): 40-44.
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
k
a
对误差影响较小
误差随大气散射系数
k
s
和非视线传输光程
S
的增大而增大;当
P
值(
k
s
×
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
k
s
and NLOS light propagation path
S
on the error is larger than that of absorption coefficient
k
a
; when
P
(
k
s
×
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 single-scattering model is suitable for studying NLOS light propagation in scattering atmosphere.
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