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Laurent Collot

Publications and source records attributed to Laurent Collot.

3 recordsLinked to original sources
arXiv2011

Synthetic-aperture experiment in the visible with on-axis digital heterodyne holography

We have developed a new on-axis digital holographic technique, heterodyne holography. The resolution of this technique is limited mainly by the amount of data recorded on two-dimensional photodetectors, i.e., the number of pixels and their size. We demonstrate that it is possible to increase the resolution linearly with the amount of recorded data by aperture synthesis as done in the radar technique but with an optical holographic field.

physics.optics↗
arXiv2011

Numerical heterodyne holography with two-dimensional photodetector arrays

We present an original heterodyne holography method for digital holography that relies on two-dimensional heterodyne detection to record the phase and the amplitude of a f ield. The technique has been tested on objects as much as 13 mm in size. Consistency checks were performed, and high-resolution images were computed. We show the requirement for a spatial f ilter to select properly sampled near-axis photons. Heterodyne holography is superior to off-axis digital holography for both f ield of view and resolution.

physics.optics↗