Effects of the surface boundary on the determination of the optical properties of a turbid medium with time-resolved reflectance.
Solutions of the time-dependent diffusion equation were developed to take into account the depth of the source and the detector inside a semi-infinite medium. These solutions permitted an evaluation of optical properties at different depths below the surface by fitting time-resolved data. Measurements were performed on liquid optical phantoms with optical fibers for delivering and collecting light. A time-correlated single-photon-counting chain was used for electronic detection. The determination of optical properties underlines the continuity between the surface model and the infinite model and shows the depth at which the derived solutions can be applied.
Laidevant
Aurélie
A
Département Micro-Technologies pour la Biologie et la Santé, Recherche Technologique Grenoble, Grenoble Cedex, France. laidevant@cea.fr
da Silva
Anabela
A
Berger
Michel
M
Dinten
Jean-Marc
JM
D003102:Colloids / Q000737:chemistry*; D045424:Complex Mixtures / Q000737:chemistry*; D003198:Computer Simulation; D004058:Diffusion; D008027:Light; D008954:Models, Biological; D008956:Models, Chemical; D009391:Nephelometry and Turbidimetry / Q000379:methods*; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D013499:Surface Properties
D003102:Colloids; D045424:Complex Mixtures