Minimally invasive lensless fiber endoscopy using distal holographic image formation for technical inspections and biomedicine

Johannes Gürtler; Robert Kuschmierz; Jürgen Czarske

doi:10.1117/12.2621131

20 May 2022 Minimally invasive lensless fiber endoscopy using distal holographic image formation for technical inspections and biomedicine

Johannes Gürtler, Robert Kuschmierz, Jürgen Czarske

Author Affiliations +

Proceedings Volume PC12137, Optics and Photonics for Advanced Dimensional Metrology II; PC1213708 (2022) https://doi.org/10.1117/12.2621131
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

Coherent fiber bundles (CFB) are commonly used for endoscopic imaging, e.g. in biomedicine like non-destructive in-vivo diagnostics on brain tissue or inside cochlear. Usually, a CFB with several 10,000 cores is employed, allowing pixelated imaging of only intensity information due to unknown phase deviations for each single core, limiting the applicable optical measurement methods. However, using holographic image formation at the distal fiber facet enables 3D imaging by detecting only intensity information through the fiber. We demonstrate a miniaturized lensless endoscope for vibration measurements through a coherent fiber bundle.

Conference Presentation

Citation Download Citation

Johannes Gürtler, Robert Kuschmierz, and Jürgen Czarske "Minimally invasive lensless fiber endoscopy using distal holographic image formation for technical inspections and biomedicine", Proc. SPIE PC12137, Optics and Photonics for Advanced Dimensional Metrology II, PC1213708 (20 May 2022); https://doi.org/10.1117/12.2621131

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