Minimally invasive 3D endoscopy using diffractive optical elements and deep learning

Robert Kuschmierz; Julian Lich; Tom Glosemeyer; Elias Scharf; Jürgen W. Czarske

doi:10.1117/12.2606838

7 March 2022 Minimally invasive 3D endoscopy using diffractive optical elements and deep learning

Robert Kuschmierz, Julian Lich, Tom Glosemeyer, Elias Scharf, Jürgen W. Czarske

Proceedings Volume PC11937, Endoscopic Microscopy XVII; PC119370A (2022) https://doi.org/10.1117/12.2606838
Event: SPIE BiOS, 2022, San Francisco, California, United States

Abstract

Coherent Fiber Bundels (CFB) enable ultrathin lensless endoscopes, but suffer from phase distortions. Currently spatial light modulators are used for phase conjugation enabling 3D imaging, without distal optics. We introduce diffractive optical elements (DOE) for aberration correction. DOEs made by 2-photon lithography are used to correct static phase distortions and enable direct transfer of holograms for 3D imaging. Furthermore, random DOEs can code 3D object information in 2D intensity speckle patterns, which are decoded using neural networks. Both approaches enable single shot 3D imaging, in a compact and robust system with diameters below 500 µm for deep brain imaging.

Conference Presentation

Citation Download Citation

Robert Kuschmierz, Julian Lich, Tom Glosemeyer, Elias Scharf, and Jürgen W. Czarske "Minimally invasive 3D endoscopy using diffractive optical elements and deep learning", Proc. SPIE PC11937, Endoscopic Microscopy XVII, PC119370A (7 March 2022); https://doi.org/10.1117/12.2606838

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