Simulation of diffuse reflectance for characterisation of particle suspensions

Thomson, Kelly and Stoliarskaia, Daria and Tiernan-Vandermotten, Sarra and Lue, Leo and Chen, Yi-Chieh (2017) Simulation of diffuse reflectance for characterisation of particle suspensions. In: Optical Diagnostics and Sensing XVII. Proceedings of SPIE, 10072 . Society of Photo-optical Instrumentation Engineers (SPIE), Bellingham, Washington. ISBN 9781510605855

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    Abstract

    We employ a physical theory to construct a computational model that accounts for both multiple scattering and absorption of light. The approach does not require a calibration model. Mie theory to describe single particle scattering, which is combined with the diffuse approximation to the radiative transfer equation to provides an analytical prediction of the reflectance. This approach is applied to experimental reflectance measurements on polystyrene particle suspensions with a wide range of particle radii and volume fractions. The method provides good estimates of the suspension properties from a full NIR-vis-UV spectrum.