Extended field-of-view in a lensless endoscope using an aperiodic multicore fiber

Abstract

We investigate lensless endoscopy using coherent beam combining and aperiodic multicore fibers (MCF). We show that diffracted orders, inherent to MCF with periodically arranged cores, dramatically reduce the field of view (FoV) and that randomness in MCF core positions can increase the FoV up to the diffraction limit set by a single fiber core, while maintaining MCF experimental feasibility. We demonstrate experimentally pixelation-free lensless endoscopy imaging over a 120 micron FoV with an aperiodic MCF designed with widely spaced cores. We show that this system is suitable to perform beam scanning imaging by simply applying a tilt to the proximal wavefront.

arXiv commentSubmitted to Optics Letters

References in corpus (3)

• Two-photon imaging through a multimode fiber
• Ultra-thin rigid endoscope: Two-photon imaging through a graded-index multi-mode fiber
• Single shot polarimetry imaging of multicore fiber

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• Interferometric lensless imaging: rank-one projections of image frequencies with speckle illuminations