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Point-source integrating-cavity absorption meter: Theoretical principles and numerical modeling

机译:点源积分腔吸收仪:理论原理与数值模拟

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A mathematical model has been developed for photon behavior within a spherical integrating-cavity absorption meter with a point Light source at the center of the cavity. Explicit expressions for the average number of collisions with the wall per photon, the average path length per photon, and the transmittance of the cavity containing a water sample relative to that containing pure water are derived for an absorbing nonscattering medium. Monte Carlo modeling shows that the operation of the point-source integrating-cavity absorption meter is essentially unaffected by scattering. Calculations of the performance of the absorption meter as a function of the cavity diameter, absorption coefficient of the medium, and the reflectivity of cavity are presented. (C) 1997 Optical Society of America.
机译:针对球形积分腔吸收仪中的光子行为,已经开发了一个数学模型,其中点光源位于腔的中心。对于吸收性非散射介质,得出了与每个光子与壁的平均碰撞次数,每个光子的平均路径长度以及包含水样品的腔体相对于包含纯水的腔体的透射率的明确表达式。蒙特卡洛模型表明,点源积分腔吸收仪的操作基本上不受散射影响。提出了根据腔直径,介质的吸收系数和腔的反射率来计算吸收计性能的方法。 (C)1997年美国眼镜学会。

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