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Time-gated techniques for biological imaging

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5 Author(s)
Duncan, M.D. ; Laser Phys. Branch, Naval Res. Lab., Washington, DC, USA ; Reintjes, J. ; Bashkansky, M. ; Moon, J.A.
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Discusses various studies performed at the Naval Research Laboratory related to optical imaging in turbid media. Those studies have concentrated on time-gated imaging using light in both the ballistic and diffuse scattering regimes. In the ballistic regime the authors utilized a high-gain Raman amplifier to achieve diffraction limited imaging through 33 scattering lengths of a highly turbid material. Coherence-gated imaging experiments were also performed in this regime using Raman techniques, and the authors discuss current work that uses low-coherence interferometry to image structural defects in a variety of highly scattering materials. In the diffuse scattering regime, the authors present theoretical and experimental results that were obtained for time-gated light propagating in the full diffusion limit, and also in a regime they have termed quasidiffuse. Spatial-resolution limitations are discussed for both cases

Published in:

Lasers and Electro-Optics Society Annual Meeting, 1998. LEOS '98. IEEE  (Volume:2 )

Date of Conference:

3-4 Dec 1998