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Issue 23, 2003
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Optical sensing with photon density waves: Investigation of model media

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Abstract

Investigations with frequency domain photon density waves allow elucidation of absorption and scattering properties of turbid media. The temporal and spatial propagation of intensity modulated light with frequencies up to more than 1 GHz can be described by the P1 approximation to the Boltzmann transport equation. In this study, we establish requirements for the appropriate choice of turbid model media and characterize mixtures of isosulfan blue as absorber and polystyrene beads as scatterer. For these model media, the independent determination of absorption and reduced scattering coefficients over large absorber and scatterer concentration ranges is demonstrated with a frequency domain photon density wave spectrometer employing intensity and phase measurements at various modulation frequencies.

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Article information


Submitted
24 Jul 2003
Accepted
23 Oct 2003
First published
31 Oct 2003

Phys. Chem. Chem. Phys., 2003,5, 5182-5187
Article type
Paper

Optical sensing with photon density waves: Investigation of model media

O. Reich, H. Löhmannsröben and F. Schael, Phys. Chem. Chem. Phys., 2003, 5, 5182
DOI: 10.1039/B308630E

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