Particle sizing in concentrated suspensions by use of steady-state, continuous-wave photon-migration techniques

We demonstrate a new approach for determining particle-size distribution in concentrated suspensions from spectral measurement of isotropic scattering coefficients by use of steady-state, continuous wave photon-migration techniques. Successful recovery of particle-size distribution for TiO2 suspensions in the form of log-normal functions is achieved through a regularized inverse algorithm, into which a synthesized scheme of Marquardt and Tikhonov regularizations has been incorporated. Our results for dense TiO2 suspensions with three different particle concentrations are in excellent agreement with the size distribution as measured with x-rag sedimentation. (C) 1998 Optical Society of America.