Analysis of the Spatial Distribution of Detector Sensitivity in a MultilayerRandomly Inhomogeneous Medium with Strong Light Scattering and Absorption by theMonte Carlo Method.

摘要

The spatial distribution of sensitivity in the domain of detection of a fiber-optic sensor used for spectrophotometric studies of skin and other biologicaltissues is studied. The method and results of modeling the propagation ofoptical radiation in multilayer randomly inhomogeneous media with strong lightscattering and absorption are presented. Owing to the small distances betweenthe source and detector (100–800 µm), the propagation of radiation in the mediumunder study is modeled by the Monte Carlo method combining the calculation oftrue paths and the use of statistical weights. For the same reason, we representthe surface and interfaces of layers of skin as rough randomly periodic surfacescorresponding to the actual structure of human skin. The method presented can berecommended as a means for the optimum selection of an arrangement for radiationincoupling and outcoupli