Study on Light Scattering Characteristics of Dirty Bubbles
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摘要: 为了更好地解释真实海洋环境中尾流的光散射特性, 探究在真实海洋环境中由于有机物薄膜引起的尾流气泡光散射特性的变化。基于Mie散射理论, 仿真了不同波长光入射时干净气泡、被蛋白质膜和脂质膜包裹的有机气泡的散射光强分布、散射系数、散射相函数及偏振度。仿真结果表明: 干净气泡和２种膜包裹的有机气泡的散射系数均在2.025上下震荡, 且有机气泡的振荡幅值明显大于干净气泡; 当散射角为180°时, 被油脂和蛋白质包裹的有机气泡的散射光强和散射相函数的值明显增大; 有机气泡可以增大散射系数震荡的幅值并增大背向散射强度。仿真结果可为实际海洋环境尾流探测提供理论与数据支撑, 也为海洋污染、水质勘探提供现实依据。Abstract: In order to provide a more thorough explanation of the light scattering properties of wake in real marine environments, this study examines the variations in light scattering properties of wake bubbles induced by organic matter films in actual marine settings. Drawing on scattering theory, the study simulates the scattering intensity distribution, scattering coefficient, scattering phase function, and polarization degree of clean bubbles, as well as organic bubbles enveloped in protein and lipid films, under varying wavelengths of incident light. The simulation findings reveal that the scattering coefficients of clean bubbles and the two types of organic bubbles with membranes fluctuate around 2.025, with the organic bubbles exhibiting significantly larger oscillation amplitudes than the clean bubbles. Notably, at a scattering angle of 180°, the scattering intensity and scattering phase function of organic bubbles enveloped in oil and protein experience a notable increase. These organic bubbles have the potential to amplify the amplitude of scattering coefficient oscillations and the intensity of backscattering. The simulation results offer theoretical and empirical support for wake detection in real marine environments, and also provide a practical foundation for research on marine pollution and water quality assessment.
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图 1
$ {\boldsymbol{\lambda =}} {\boldsymbol{632.8}}\;{\bf{nm}} $ 时光强取对数之后的分布图Figure 1.
$ {\boldsymbol{\lambda}} {\bf{= 632.8}}\;{\bf{nm}} $ Light intensity distribution map after taking logarithm
图 2
$ {\boldsymbol{\lambda}} {\bf{= 532}}\;{\bf{nm}} $ 时光强取对数之后的分布图Figure 2.
$ {\boldsymbol{\lambda}} {\bf{= 532}}\;{\bf{nm}} $ Light intensity distribution map after taking logarithm
图 3
$ {\boldsymbol{\lambda}} {\boldsymbol{= 632.8}}\;{\bf{nm}} $ 时不同折射率的散射系数分布Figure 3.
$ {\boldsymbol{\lambda}} {\boldsymbol{= 632.8}}\;{\bf{nm}} $ Distribution of extinction coefficients with different refractive indices
图 4
$ {\boldsymbol{\lambda =}} {\boldsymbol{532}}\;{\bf{nm}} $ 时不同折射率的散射系数分布Figure 4.
${\boldsymbol{ \lambda =}} {\boldsymbol{532}}\;{\bf{nm}} $ Distribution of extinction coefficients with different refractive indices
图 5
$ {\boldsymbol{\lambda = 632.8}}\;{\bf{nm}} $ 时取对数之后的散射相函数分布Figure 5.
${\boldsymbol{ \lambda =}} {\boldsymbol{632.8}} \;{\bf{nm}} $ Scattering phase function distribution after taking logarithms
图 6
$ {\boldsymbol{\lambda = 532}}\;{\bf{nm}} $ 时取对数之后的散射相函数分布Figure 6.
$ {\boldsymbol{\lambda = 532}}\;{\bf{nm}} $ Scattering phase function distribution after taking logarithms
图 7
$ {\boldsymbol{\lambda = 632.8}}\;{\bf{nm}} $ 时三种状态下偏振度对比Figure 7.
${\boldsymbol{ \lambda = 632.8}}\;{\bf{nm}} $ Comparison of Polarization Degrees in Three States -
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