McMillin L M, Crone L J, Kleespies T J
Appl Opt. 1995 Dec 20;34(36):8396-9. doi: 10.1364/AO.34.008396.
Improvements to a fast and accurate transmittance-calculation procedure, Optical Path TRANsmittance (OPTRAN), are described. The previous version computed a transmittance ratio for an absorbing layer. It required special attention to the interpolation methodology. The new approach reported here computes the absorption coefficient for an absorbing layer. This modified approach is not only simpler but also runs in one twentieth the time of the original OPTRAN approach with the same accuracy.
本文描述了对一种快速准确的透过率计算程序——光程透过率（OPTRAN）的改进。先前版本计算的是吸收层的透过率比值。它需要特别关注插值方法。此处报告的新方法计算的是吸收层的吸收系数。这种改进后的方法不仅更简单，而且在精度相同的情况下，运行时间仅为原始OPTRAN方法的二十分之一。
