Khoury J, Kane JS, Gianino PD, Hemmer PL, Woods CL. Homodyne and heterodyne imaging through a scattering medium.
OPTICS LETTERS 2001;
26:1433-1435. [PMID:
18049629 DOI:
10.1364/ol.26.001433]
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Abstract
We introduce a novel two-dimensional (2D) homodyne and heterodyne technique for imaging objects through or embedded in a scattering medium. Our imaging approach is based on heterodyning of light with different Doppler broadenings that is scattered from objects of two different textures or from an opaque object and a textured scattering medium. We report on the initial demonstration of pulling signals out of noise for an object hidden behind a scattering medium. Enhancements of signal-to-noise ratio of the order of 50 have been achieved by use of a 2D holographic phase-sensitive detector. We also discuss the experimental feasibility of this approach for objects embedded in a scattering medium.
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