title: Widefield lensless imaging through a fiber bundle via speckle correlations.
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.
authors.forename: Amir
authors.initials: A
authors.lastname: Porat
authors.forename: Esben Ravn
authors.initials: ER
authors.lastname: Andresen
authors.forename: Hervé
authors.initials: H
authors.lastname: Rigneault
authors.forename: Dan
authors.initials: D
authors.lastname: Oron
authors.forename: Sylvain
authors.initials: S
authors.lastname: Gigan
authors.forename: Ori
authors.initials: O
authors.lastname: Katz