World's smallest single-shot two-wavelength holographic endoscope for 3D surface measurement

Alexander Gröger; Giancarlo Pedrini; Daniel Claus; Felix Fischer; Stephan Reichelt; Simon Thiele; Nils Fahrbach

doi:10.1117/12.2662817

17 March 2023 World's smallest single-shot two-wavelength holographic endoscope for 3D surface measurement

Alexander Gröger, Giancarlo Pedrini, Daniel Claus, Felix Fischer, Stephan Reichelt, Simon Thiele, Nils Fahrbach

Proceedings Volume PC12356, Endoscopic Microscopy XVIII; PC123560P (2023) https://doi.org/10.1117/12.2662817
Event: SPIE BiOS, 2023, San Francisco, California, United States

Conference Poster

Abstract

Coherent fiber bundles with their small diameter (less than 300 microns) pave the way towards ultra-thin holographic endoscopes. However, holographic imaging through CFBs suffers from random phase distortions due to the light transport through the fiber cores. We use two-wavelength digital holography, exploiting spectral correlations to eliminate the detrimental effects introduced by the fibre bundle. We use two-photon-polymerization to print our micro optics directly onto both the imaging fiber bundle and illumination fiber. Using an off-axis holographic setup and two lasers we are able to perform single-shot 3D holographic shape measurement.

Citation Download Citation

Alexander Gröger, Giancarlo Pedrini, Daniel Claus, Felix Fischer, Stephan Reichelt, Simon Thiele, and Nils Fahrbach "World's smallest single-shot two-wavelength holographic endoscope for 3D surface measurement", Proc. SPIE PC12356, Endoscopic Microscopy XVIII, PC123560P (17 March 2023); https://doi.org/10.1117/12.2662817

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