Frequency-domain technique for optical property measurements in moderatelyscattering media

We demonstrate a reflection geometry frequency-domain technique that is sui table for measurement of the optical properties of a medium with moderate s catter and absorption (mu(s) and mu(a) similar to 1 m(-1)). Variations in a bsorption and scatter produce opposing tends in the amplitude signal and co mmon trends in the phase signal, allowing unique determination of absorptio n and scattering coefficients for a given phase function. An analytical mod el based on single-scattering events gives good agreement with experimental measurements. (C) 2000 Optical Society of America.