We describe a scheme in which a camera is turned into an efficient tunable frequency filter of a few-Hertz bandwidth in an off-axis, heterodyne optical mixing configuration, enabling one to perform parallel, high-resolution coherent spectral imaging. This approach is made possible through the combination of a spatial and temporal modulation of the signal to reject noise contributions. Experimental data obtained with dynamically scattered light by a suspension of particles in Brownian motion is interpreted.
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AFFILIATION: Laboratoire Kastler Brossel, Université Pierre et Marie-Curie, Centre National de la Recherche Scientifique, UMR 8552, Paris, France. atlan@optique,espci.fr
Country: United States
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MEDLINETA: J Opt Soc Am A Opt Image Sci V
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