Abstract

Time-resolved transillumination techniques have been used to image opaque^1-6 and partially absorbing^7-10 objects hidden in various random media. When ultrashort laser pulses are incident on a slab of scattering medium the transmitted pulses consist of a ballistic (coherent) component^11-12, a diffuse component and a snake component¹. Using time-resolved detection techniques, the snake photons can be separated from the diffuse component and used to construct the image of an object hidden in a scattering medium with different optical properties. Recently, it has been shown that thick tissue imaging is possible using snake photons in the visible region¹⁰.

© 1994 Optical Society of America