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.
© 1993 Optical Society of America
Original Manuscript: September 15, 1992
Published: September 10, 1993
L. Wang, P. P. Ho, and R. R. Alfano, "Time-resolved Fourier spectrum and imaging in highly scattering media," Appl. Opt. 32, 5043-5048 (1993)