Numerical evaluation of droplet sizing based on the ratio of fluorescent and scattered light intensities (LIF/Mie technique)
Numerical evaluation of droplet sizing based on the ratio of fluorescent and scattered light intensities (LIF/Mie technique)
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DOI：
10.1364/ao.50.001197
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发表时间：
2011-03-20
期刊：
影响因子：
1.9
通讯作者：
Hardalupas, Yannis
中科院分区：
文献类型：
--
作者：
Charalampous, Georgios;Hardalupas, Yannis
利用米氏理论，从球形液滴的荧光和散射光强度的液滴直径的依赖性进行了评估。重点是液滴尺寸的评价，基于激光诱导荧光和散射光强度的比率（LIF/米氏技术）。提出了一个参数的研究，其中包括散射角的影响，折射率的真实的部分和液体中的染料浓度（确定的折射率的虚部）。假设荧光和散射光强度与液滴的体积和表面积成比例以进行精确的尺寸测量通常是无效的。更精确的尺寸测量可以在液体中具有最小的染料浓度并且通过以60度而不是通常使用的90度的散射角收集光来进行。不利的尺寸精度的振荡的散射光强度与液滴直径是深刻的在侧散射方向（90度）和液滴的折射率约1.4。(C)2011年美国光学学会
The dependence of fluorescent and scattered light intensities from spherical droplets on droplet diameter was evaluated using Mie theory. The emphasis is on the evaluation of droplet sizing, based on the ratio of laser-induced fluorescence and scattered light intensities (LIF/Mie technique). A parametric study is presented, which includes the effects of scattering angle, the real part of the refractive index and the dye concentration in the liquid (determining the imaginary part of the refractive index). The assumption that the fluorescent and scattered light intensities are proportional to the volume and surface area of the droplets for accurate sizing measurements is not generally valid. More accurate sizing measurements can be performed with minimal dye concentration in the liquid and by collecting light at a scattering angle of 60 degrees rather than the commonly used angle of 90 degrees. Unfavorable to the sizing accuracy are oscillations of the scattered light intensity with droplet diameter that are profound at the sidescatter direction (90 degrees) and for droplets with refractive indices around 1.4. (C) 2011 Optical Society of America