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31 May 2002 High-speed 3D imaging using photorefractive holography with novel low-coherence interferometers
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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.
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Y. Gu, Zunaira Ansari, Christopher W. Dunsby, Mary Tziraki, Duncan Parsons-Karavassilis, Jan Siegel, Paul M. W. French, David D. Nolte, and Michael R. Melloch "High-speed 3D imaging using photorefractive holography with novel low-coherence interferometers", Proc. SPIE 4705, Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II, (31 May 2002); https://doi.org/10.1117/12.469019
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