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© Research
Publication : Optics letters

Off-axis compressed holographic microscopy in low-light conditions

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Optics letters - 01 Jan 2011

Marim M, Angelini E, Olivo-Marin JC, Atlan M

Link to Pubmed [PMID] – 21209693

Opt Lett 2011 Jan;36(1):79-81

This Letter reports a demonstration of off-axis compressed holography in low-light level imaging conditions. An acquisition protocol relying on a single exposure of a randomly undersampled diffraction map of the optical field, recorded in the high heterodyne gain regime, is proposed. The image acquisition scheme is based on compressed sensing, a theory establishing that near-exact recovery of an unknown sparse signal is possible from a small number of nonstructured measurements. Image reconstruction is further enhanced by introducing an off-axis spatial support constraint to the image estimation algorithm. We report accurate experimental recovering of holographic images of a resolution target in low-light conditions with a frame exposure of 5 μs, scaling down measurements to 9% of random pixels within the array detector.

https://www.ncbi.nlm.nih.gov/pubmed/21209693