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 journalArticle

49 Citations (Scopus)

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 languageEnglish
Pages (from-to)16835-16855
Number of pages21
JournalOptics express
Volume24
Issue number15
DOIs
Publication statusPublished - Jul 25 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Porat, A., Andresen, E. R., Rigneault, H., Oron, D., Gigan, S., & Katz, O. (2016). Widefield lensless imaging through a fiber bundle via speckle correlations. Optics express, 24(15), 16835-16855. https://doi.org/10.1364/OE.24.016835