Time-resolved Fourier spectrum and imaging in highly scattering media.
Time and spatial-gated Fourier spectra and imaging were measured and analyzed. A picosecond Kerr-Fourier gate was used to image objects by selecting the spatial frequencies of objects illuminated by a laser pulse passing through a thick turbid medium. The earlier arriving ballistic/snake light and most of the later scattered light were spatially filtered and temporally separated to form an image. The image contrast and the signal-to-noise ratio of hidden objects in turbid media were greatly improved with the addition of Fourier spatial filtering.
Wang
L
L
Ho
P P
PP
Alfano
R R
RR