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15 May 2014 Optical transmission measurements for in-line monitoring of turbid oil-water emulsions
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For absorbing media the concentration may be calculated directly from the optical transmission following the logarithmic dependence given in the Lambert-Beer law. Due to multiple scattering events in oil-water emulsions (e.g. milk, cream, etc.), these exhibit a nonlinear relationship between the attenuation and the oil concentration. We demonstrate that for increasing oil content in oil-water emulsions the attenuation first increases, then levels out, and finally even decreases for a fat content of 60%. Single-wavelength optical transmission measurements are found to be well suited for the in-line monitoring of oil-water emulsions of fat contents below 20%, e.g., for the in-line fat content monitoring of milk. Using experiments and ray-tracing simulations we evaluate system optimization.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Philipp Metz, Katja Dopf, Markus Aichholz, Boris Riedel, Uli Lemmer, Barbara Freudig, Clifton Zimmermann, and Martina Gerken "Optical transmission measurements for in-line monitoring of turbid oil-water emulsions", Proc. SPIE 9141, Optical Sensing and Detection III, 91410J (15 May 2014);

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