物理学报2012，Vol.61Issue(8)：169-175,7.
椭球模型下通过雾场的多重光散射谱
Multiple scattering spectra through fog particles in the ellipsoidal model
摘要
Abstract
Because of the properties of non-sphericity and multiple scattering of fog particles and the effects of geometrical optics, the light scattering through fog has become a difficult problem. In this paper, we establish an ellipsoidal model of fog particles. On the basis of radiative-transfer equation and with the consideration of the effects of geometrical optics, we obtain a formula of calculating multiple light scattering intensity through the fog particles with different sizes and different shape distributions. Our results are in agreement with the earlier results in two special cases, which verifies that our method is reliable. The calculations show that scattering spectra through the ellipsoidal fog particles present elliptical feature, which is different from circular feature for random orientation nonspherical particles. At the different orientation angles the angular distributions of the light intensity are different, and this difference becomes smaller with the shape ratio approaching to 1. The stripes of the scattering spectra progressively disappear with the increase of optical thickness, which is different from the case of single-scattering. At different orientation angles and observation angles, the scattering intensities always first increase then decrease with the increase of optical thickness for the fog particles of the different size distributions and different shape ratio distributions, and a maximal intensity occurs at r=1.0-3.0. The calculations also indicate that the scattering spectra of actual fog particles present the turbid pattern around the central light speckle because of wide size distribution in many cases.关键词
多重光散射/雾滴/椭球/光谱Key words
multiple light scattering/fog particles/ellipsoid/light spectrum分类
化学化工引用本文复制引用
戴兵,袁银男,梅德清,江俊康,戴珊珊..椭球模型下通过雾场的多重光散射谱[J].物理学报,2012,61(8):169-175,7.基金项目
国家自然科学基金（批准号：50976051）、交通运输部科技攻关计划（批准号：2009-353.332.280）和江苏省交通运输厅科技创新攻关计划（批准号：10Y25）资助的课题. （）
