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Science 16 August 1991:
Vol. 253. no. 5021, pp. 769 - 771
DOI: 10.1126/science.253.5021.769
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Articles

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

L. WANG 1, P. P. HO 1, C. LIU 1, G. ZHANG 1, and R. R. ALFANO 2

1 Department of Electrical Engineering, Institute for Ultrafast Spectroscopy and Lasers, The City College and the Graduate School of The City University of New York, New York, NY 10031
2 Departments of Electrical Engineering and Physics, Institute for Ultrafast Spectroscopy and Lasers, The City College and the Graduate School of The City University of New York, New York, NY 10031

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.

Submitted on April 18, 1991
Accepted on June 13, 1991


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