INDUCED BACKSCATTERING DUE TO REFLECTING SURFACES IN HIGHLY SCATTERING MEDIA

Reflecting surfaces embedded in highly scattering media show strongly enhanced scattering in time-resolved backscattering experiments. The r eflecting surface manifests itself by a peak in the backscattered inte nsity at a time corresponding to the position of the surface. This pea k is clearly visible even if the direct specular reflection of the sur face does not enter the detection system. Monte-Carlo simulations are presented which reproduce the observations and lead to an understandin g of the processes causing the visibility of the tilted reflecting sur faces.