Off-axis compressed holographic microscopy in low-light conditions
Abstract
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 \mu s, scaling down measurements to 9% of random pixels within the array detector.
Cite
@article{arxiv.1101.1735,
title = {Off-axis compressed holographic microscopy in low-light conditions},
author = {Marcio M. Marim and Elsa Angelini and J. C. Olivo-Marin and Michael Atlan},
journal= {arXiv preprint arXiv:1101.1735},
year = {2015}
}