REDUCED LIGHT-SCATTERING PROPERTIES FOR MIXTURES OF SPHERICAL-PARTICLES - A SIMPLE APPROXIMATION DERIVED FROM MIE CALCULATIONS
REDUCED LIGHT-SCATTERING PROPERTIES FOR MIXTURES OF SPHERICAL-PARTICLES - A SIMPLE APPROXIMATION DERIVED FROM MIE CALCULATIONS
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DOI：
10.1364/ao.31.001370
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发表时间：
1992-04-01
期刊：
影响因子：
1.9
通讯作者：
KOELINK, MH
中科院分区：
文献类型：
--
作者：
GRAAFF, R;AARNOUDSE, JG;KOELINK, MH
单位体积的约化散射截面Σ(s)' = Σ(s)(1 - g)是描述光在有散射和吸收的介质中传播的一个重要参数。对无吸收球体的不对称因子g以及散射截面Σ(s)与粒子截面之比Q(sca)进行的米氏（Mie）计算表明，当相对折射率m和尺寸x的米氏参数分别在1 < m ≤ 1.1和5 < x < 50的范围内时，Q(sca)(1 - g) = 3.28×0.37 (m - 1)^2.09的误差在百分之几以内。两个波长的辐射的约化散射截面之比在上述范围内也与尺寸无关，即使对于不同尺寸球体的混合物也是如此。这些结果对于生物医学应用似乎很有前景。
The reduced scattering cross section per unit of volume SIGMA(s)' = SIGMA(s)(1 - g) is an important parameter to describe light propagation in media with scattering and absorption. Mie calculations of the asymmetry factor g for nonabsorbing spheres and Q(sca), the ratio of the scattering cross section SIGMA(s) and the particle cross section, show that Q(sca)(1 - g) = 3.28x0.37 (m - 1)2.09 is true to within a few percent, when the Mie parameters for relative refractive index m and size x are in the ranges of 1 < m less-than-or-equal-to 1.1 and 5 < x < 50, respectively. A ratio of reduced scattering cross sections for radiation at two wavelengths is also independent of the size within the range mentioned, even for mixtures of different size spheres. The results seem promising for biomedical applications.