Time-resolved imaging in dense scattering media

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

doi:10.1117/12.151172

27 August 1993 Time-resolved imaging in dense scattering media

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

Author Affiliations +

Proceedings Volume 1887, Physiological Imaging, Spectroscopy, and Early-Detection Diagnostic Methods; (1993) https://doi.org/10.1117/12.151172
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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.

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Jeng-Hua Chang, Yao Wang, Raphael Aronson, Harry L. Graber, Randall Locke Barbour, Bidyut Baran Das, Jean J. Dolne, Kwong Mow Yoo, and Robert R. Alfano "Time-resolved imaging in dense scattering media", Proc. SPIE 1887, Physiological Imaging, Spectroscopy, and Early-Detection Diagnostic Methods, (27 August 1993); doi: 10.1117/12.151172; https://doi.org/10.1117/12.151172

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