Morin M, Verreault S, Mailloux A, Fréchette J, Chatigny S, Painchaud Y, Beaudry P
InstitutNational d'Optique, Sainte-Foy, G1P 4S4 Québec, Canada.
Appl Opt. 2000 Jun 1;39(16):2840-52. doi: 10.1364/ao.39.002840.
A procedure for the time-domain optical characterization of an inclusion in a scattering slab is investigated theoretically and experimentally. The method relies on the measurement of a contrast function, which is defined as the time-dependent relative change in the transmitted signal resulting from the presence of the inclusion. Analytical expressions for the contrast functions of absorptive and diffusive inclusions are obtained through a perturbation solution of the diffusion equation. This procedure is used successfully to determine the optical properties of absorptive, diffusive, and mixed inclusions located at midplane in a scattering slab by use of time-resolved transmittance measurements.
