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Proceedings Paper

High-speed 3-D imaging using photorefractive holography with novel low-coherence interferometers
Author(s): Y. Gu; Zunaira Ansari; Christopher W. Dunsby; Mary Tziraki; Duncan Parsons-Karavassilis; Jan Siegel; Paul M. W. French; David D. Nolte; Michael R. Melloch
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Paper Abstract

When imaging through scattering media it is easiest to visualise a pulse propagating through the material. As the light propagates it is scattered away from its original trajectory and it becomes diffuse, both spatially and temporally. It is important to note that this picture is also valid for short coherence length c.w. light. In order to create a high resolution wide-field image, in an ideal case, it is necessary to select only the unscattered ballistic photons. This may be achieved using the coherence properties of the light. If the beam is initially split into an incident beam and a reference beam then only the unscattered ballistic photons will retain coherence with the reference beam. Therefore only this light will produce an interference pattern. In the wide-field case this interference of light from the object and light from a reference beam is termed holography.

Paper Details

Date Published: 31 May 2002
PDF: 13 pages
Proc. SPIE 4705, Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II, (31 May 2002); doi: 10.1117/12.469019
Show Author Affiliations
Y. Gu, Imperial College of Science, Technology, and Medicine (United Kingdom)
Zunaira Ansari, Imperial College of Science, Technology, and Medicine (United Kingdom)
Christopher W. Dunsby, Imperial College of Science, Technology, and Medicine (United Kingdom)
Mary Tziraki, Imperial College of Science, Technology, and Medicine (United Kingdom)
Duncan Parsons-Karavassilis, Imperial College of Science, Technology, and Medicine (United Kingdom)
Jan Siegel, Imperial College of Science, Technology, and Medicine (United Kingdom)
Paul M. W. French, Imperial College of Science, Technology, and Medicine (United Kingdom)
David D. Nolte, Purdue Univ. (United States)
Michael R. Melloch, Purdue Univ. (United States)


Published in SPIE Proceedings Vol. 4705:
Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II
Dmitry A. Zimnyakov, Editor(s)

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