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Title: Imaging through fog using quadrature lock-in discrimination
Authors: Kumar, Shashank
Debnath, Bapan
Meena, M.S.
Fade, Julien
Dhar, Sankar
Alouini, Mehdi
Bretenaker, Fabien
Ramachandran, Hema
Issue Date: May-2021
Publisher: Optical Society of America
Citation: OSA Continuum, 2021, Vol. 4,p.1649-1657
Abstract: We report experiments conducted in the field in the presence of fog, that were aimed at imaging under poor visibility. By means of intensity modulation at the source and two-dimensional quadrature lock-in detection by software at the receiver, a significant enhancement of the contrast-to-noise ratio was achieved in the imaging of beacons over hectometric distances. Further by illuminating the field of view with a modulated source, the technique helped reveal objects that were earlier obscured due to multiple scattering of light. This method, thus, holds promise of aiding in various forms of navigation under poor visibility due to fog.
Description: Open Access
ISSN: 2578-7519
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Copyright: 2021 Optical Society of America
Appears in Collections:Research Papers (LAMP)

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