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Proceedings Paper

Time-resolved imaging in dense scattering media
Author(s): Jeng-Hua Chang; Yao Wang; Raphael Aronson; Harry L. Graber; Randall Locke Barbour; Bidyut Baran Das; Jean J. Dolne; Kwong Mow Yoo; Robert R. Alfano
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Paper Abstract

The ability to image at optical frequencies objects embedded in a dense scattering medium has been experimentally evaluated using a previously described Progressive Expansion (PE) algorithm. Optical backscatter measurements were performed in a limited raster-type scan using a colliding pulse modelocked (CPM) femtosecond laser operating at 620 nm and streak camera. Data were collected in the presence and absence of the embedded absorber (3 mm diameter bead) located at a depth not visible from the surface, smoothed and evaluated between - - 200 ps in steps of 36 ps, using an overlapping approach contained in the PE algorithm, which is based on a linear perturbation model. Results obtained demonstrate the sensitivity of reconstructed images to variations in source and detector locations in relation to the subsurface location of the absorber.

Paper Details

Date Published: 27 August 1993
PDF: 12 pages
Proc. SPIE 1887, Physiological Imaging, Spectroscopy, and Early-Detection Diagnostic Methods, (27 August 1993); doi: 10.1117/12.151172
Show Author Affiliations
Jeng-Hua Chang, Polytechnic Univ. (United States)
Yao Wang, Polytechnic Univ. (United States)
Raphael Aronson, Polytechnic Univ. (United States)
Harry L. Graber, SUNY/Brooklyn Health Science Ctr. (United States)
Randall Locke Barbour, SUNY/Brooklyn Health Science Ctr. (United States)
Bidyut Baran Das, CUNY/City College (United States)
Jean J. Dolne, CUNY/City College (United States)
Kwong Mow Yoo, CUNY/City College (United States)
Robert R. Alfano, CUNY/City College (United States)


Published in SPIE Proceedings Vol. 1887:
Physiological Imaging, Spectroscopy, and Early-Detection Diagnostic Methods
Randall Locke Barbour; Mark J. Carvlin, Editor(s)

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