Widefield lensless imaging through a fiber bundle via speckle correlations

Amir Porat, Esben Ravn Andresen, Hervé Rigneault, Dan Oron, Sylvain Gigan, Ori Katz

Research output: Contribution to journalArticlepeer-review

106 Scopus citations

Abstract

Flexible fiber-optic endoscopes provide a solution for imaging at depths beyond the reach of conventional microscopes. Current endoscopes require focusing and/or scanning mechanisms at the distal end, which limit miniaturization, frame-rate, and field of view. Alternative wavefront-shaping based lensless solutions are extremely sensitive to fiber-bending. We present a lensless, bend-insensitive, single-shot imaging approach based on speckle-correlations in fiber bundles that does not require wavefront shaping. Our approach computationally retrieves the target image by analyzing a single camera frame, exploiting phase information that is inherently preserved in propagation through convnetional fiber bundles. Unlike conventional fiber-based imaging, planar objects can be imaged at variable working distances, the resulting image is unpixelated and diffraction-limited, and miniaturization is limited only by the fiber diameter.

Original languageAmerican English
Pages (from-to)16835-16855
Number of pages21
JournalOptics Express
Volume24
Issue number15
DOIs
StatePublished - 25 Jul 2016

Bibliographical note

Publisher Copyright:
© 2016 Optical Society of America.

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