Nedosekin Dmitry A, Proskurnin Mikhail A, Kononets Mikhail Yu
Division of Analytical Chemistry, Department of Chemistry, M. V. Lomonosov Moscow State University, Vorob'evy Hills, Moscow 119992, GSP-2, Russia.
Appl Opt. 2005 Oct 10;44(29):6296-306. doi: 10.1364/ao.44.006296.
A theoretical model for cw laser-induced thermal lens spectrometry of optically transparent surface-absorbing solids is developed. In the model, the sample is represented as a set of discrete layers with certain thicknesses and light absorptivities. The bloomed thermo-optical element in the sample is described with a summation of heat-flux functions for all the layers. The model employs simple mathematical expressions and can be used for both steady-state and time-resolved thermal lens experiments. Good coincidence of the experimental and theoretically predicted signal dependences is achieved. This model is verified for volume-absorbing samples (colored optical glasses) and used successfully to calculate absorbances and concentrations for various surface-absorbing samples.
建立了一种用于光学透明表面吸收固体的连续波激光诱导热透镜光谱分析的理论模型。在该模型中，样品被表示为一组具有一定厚度和光吸收率的离散层。样品中产生热晕的热光元件通过对所有层的热流函数求和来描述。该模型采用简单的数学表达式，可用于稳态和时间分辨热透镜实验。实验信号依赖性与理论预测结果吻合良好。该模型已针对体吸收样品（有色光学玻璃）进行了验证，并成功用于计算各种表面吸收样品的吸光度和浓度。
