MEASUREMENT OF THE OPTICAL COEFFICIENTS OF MULTIPLE-SCATTERING MEDIA FROM TIME-RESOLVED REFLECTANCE SPECTRA

The optical coefficients of multiple-scattering media have been measur ed by means of time-resolved reflectance spectroscopy. In particular, time-resolved reflectance spectra for various absorber concentrations and different radial distances between the incident beam and the detec ting fiber were systematically measured and analyzed. The absorption a nd transport scattering coefficients calculated based on the time-reso lved reflectance spectra were in good agreement with the values measur ed by a conventional steady-state method. We also found that these coe fficients for low absorbance scattering media could be simply obtained from the relationship between the radial distance and the time delay of the peak in the time-resolved reflectance spectra.