Modeling the performance of an integrating-cavity absorption meter: theory and calculations for a spherical cavity.
Modeling the performance of an integrating-cavity absorption meter: theory and calculations for a spherical cavity.
复制标题
积分腔吸收计的性能建模：球形腔的理论和计算。
DOI：
10.1364/ao.34.004397
复制
发表时间：
1995
期刊：
影响因子：
1.9
通讯作者：
J. Kirk
中科院分区：
文献类型：
--
作者：
J. Kirk
A mathematical model for photon behavior within a spherical integrating-cavity absorption meter (ICAM) that does not depend on the assumption of a homogeneous energy density within the cavity has been developed. Explicit expressions for the proportion of emitted or reflected photons that survive a single transit across the cavity, the average number of collisions with the wall per photon, and the average path length per photon, are derived for an absorbing nonscattering medium. Monte Carlo modeling shows that operation of the ICAM is essentially unaffected by scattering, in agreement with the experimental observations of Fry et al. [Appl. Opt. 31, 2055 (1992)]. Calculations for the performance of the absorption meter as a function of the cavity diameter, the absorption coefficient of the medium, and the reflectivity of the cavity are presented.
