Fujii Hiroyuki, Ueno Moegi, Inoue Yuki, Aoki Toshiaki, Kobayashi Kazumichi, Watanabe Masao
Opt Express. 2022 Jan 31;30(3):3538-3552. doi: 10.1364/OE.447334.
We developed model equations of light scattering properties and a characteristic time of light propagation for polydisperse colloidal suspensions at different volume fractions. By the model equations, we examined numerical results using the first-order (dependent) scattering theory (FST) and radiative transfer theory in 600-980 nm wavelength. The model equations efficiently treat the interference of electric fields scattered from colloidal particles by a single effective coefficient, providing fast computation. Meanwhile, the FST provides accurate but complicated treatment. We found the interference effects on the scattering properties and characteristic time depend linearly on wavelength. Dimensionless analysis showed a simple mechanism of the interference effects, independently of wavelength and source-detector distance.
我们推导了不同体积分数下多分散胶体悬浮液的光散射特性模型方程以及光传播的特征时间。通过这些模型方程，我们利用一阶（相关）散射理论（FST）和辐射传输理论，在600 - 980 nm波长范围内研究了数值结果。该模型方程通过单个有效系数有效地处理了胶体颗粒散射电场的干涉，实现了快速计算。同时，FST提供了精确但复杂的处理方法。我们发现干涉对散射特性和特征时间的影响与波长呈线性关系。无量纲分析揭示了干涉效应的一种简单机制，该机制与波长和源 - 探测器距离无关。
