Ballistic 2-D Imaging Through Scattering Walls Using an Ultrafast Optical Kerr Gate

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Science  16 Aug 1991:
Vol. 253, Issue 5021, pp. 769-771
DOI: 10.1126/science.253.5021.769


An ultrafast optical shutter was used to image ultrasmall objects hidden behind scattering walls by a procedure that selects in time the ballistic component and rejects the scattered diffusive light. Scattering walls used in this experiment included human breast tissue, chicken breast tissue, and a water suspension of polystyrene particles with scattering coefficients up to 21.7. Submillimeter resolution was achieved for two-dimensional ballistic images of a single point, a double-point fluorescence source, and a bar test chart in or behind these different turbid media.

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