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Measurements of optical properties of high-density media

机译:高密度介质的光学性能测量

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Measurements of optical properties (scattering coefficient μ_(s), absorption coefficient μ_(a), reduced scattering coefficient μ_(s)~(′), and asymmetry factor g) have been carried out up to a volume particle concentration of p=0.227. The results for μ_(s) and μ_(s)~(′) show significant deviations from the linear dependence on p as expected when the independent scattering assumption is fulfilled. The asymmetry factor also changed significantly. In contrast, the dependence of μ_(a) remained linear even at the largest concentration investigated. The simple linear dependence of absorption on the chromophore concentration expected from the independent scattering assumption is thus applicable also to spectroscopic measurements of dense media. A comparison with an approximate theoretical model based on the Foldy-Twersky equation is also reported. The model provides a good description of the dependence of μ_(s) on particle concentration.
机译:进行了光学性能(散射系数μ_(s),吸收系数μ_(a),降低的散射系数μ_(s)〜(')和不对称因子g)的测量,直到体积粒子浓度为p = 0.227。 。当满足独立散射假设时,μ_(s)和μ_(s)〜(')的结果表明,与p的线性相关性存在明显偏差。不对称因素也发生了显着变化。相反,μ_(a)的依赖性即使在研究的最大浓度下也保持线性。因此,吸收对独立散射假设所预期的发色团浓度的简单线性依赖性也可用于稠密介质的光谱测量。还报告了与基于Foldy-Twersky方程的近似理论模型的比较。该模型很好地描述了μ_(s)对颗粒浓度的依赖性。

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    《Applied optics》 |2003年第19期|共8页
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