Toward a miniature endomicroscope: Pixelationfree and diffraction-limited imaging through a fiber bundle

Donggyu Kim, Jungho Moon, Moonseok Kim, Taeseok Daniel Yang, Jaisoon Kim, Euiheon Chung, Wonshik Choi

Research output: Contribution to journalArticle

55 Citations (Scopus)


A fiber bundle is widely used for endoscopic imaging due to its direct image delivery capability. However, there exists an inevitable pixelation artifact, which limits spatial resolution to the diameter of individual fibers. In this Letter, we present a method that can eliminate this artifact and achieve diffraction-limited spatial resolution. We exploited the binary control of a digital micromirror device to measure a transmission matrix of a fiber bundle and to subsequently control mode mixing among individual fibers. In doing so, we achieved a 22 kHz scanning rate of a diffraction-limited focused spot and obtained fluorescence endoscope imaging (58 μm × 58 μm) with near video-rate (10.3 Hz) acquisition. Our study lays a foundation for developing an ultrathin and high-resolution microendoscope.

Original languageEnglish
Pages (from-to)1921-1924
Number of pages4
JournalOptics Letters
Issue number7
Publication statusPublished - 2014 Apr 1


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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