| Issue |
J. Eur. Opt. Society-Rapid Publ.
Volume 19, Number 1, 2023
EOSAM 2022
|
|
|---|---|---|
| Article Number | 25 | |
| Number of page(s) | 6 | |
| DOI | https://doi.org/10.1051/jeos/2023024 | |
| Published online | 17 May 2023 | |
Research Article
Two-wavelength digital holography through fog
1
Institute of Applied Optics, University of Stuttgart, Pfaffenwaldring 9, Stuttgart 70569, Germany
2
Institut für Lasertechnologien in der Medizin und Messtechnik, Helmholtzstrasse 12, Ulm 89081, Germany
* Corresponding author: alexander.groeger@ito.uni-stuttgart.de
Received:
15
February
2023
Accepted:
17
April
2023
Interferometric detection enables the acquisition of the amplitude and phase of the optical field. By making use of the synthetic wavelength as a computational construct arising from digital processing of two off-axis digital holograms, it is possible to identify the shape of an object obscured by fog and further increase the imaging range due to the increased sensitivity in coherent detection. Experiments have been conducted inside a 27 m long fog tube filled with ultrasonically generated fog. We show the improved capabilities of synthetic phase imaging through fog and compare this technique with conventional active laser illumination imaging.
Key words: Digital holography / Phase imaging / Imaging through scattering media / Two-wavelength holography / 3D shape measurement
© The Author(s), published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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