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Multimodal mid-infrared optical coherence tomography and spectroscopy for non-destructive testing and art diagnosis
Author(s): Ivan Zorin; Jakob Kilgus; Rong Su; Bernhard Lendl; Markus Brandstetter; Bettina Heise
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Paper Abstract

Novel types of supercontinuum sources radiating in the infrared (IR) spectral region provide ultra-broadband spectral coverage and maintain distinctive laser-like properties of emission such as brightness, spatial coherence and high power. Being a perfectly suitable light source for mid-infrared optical coherence tomography (OCT) and spectroscopy, supercontinuum sources initiated a significant amount of recent developments in these fields and promise to be a gamechanging factor in the nearest future. In this paper, we exhibit a simple, optimized and relatively cost-effective system operating in near and mid-infrared ranges and combining OCT and co-registered IR spectroscopy. The performance of the OCT modality of the setup is evaluated with respect to the sensitivity and roll-off. Due to reduced scattering inherited with the new spectral window, we achieve the enhancement in the penetration depth in artificial paintings, ceramics and pottery. Furthermore, the hyperspectral data is used to supplement structural information and access to the chemical composition of the sample. The gained results reveal the potential of the multimodal system for non-destructive testing, art and cultural objects diagnosis.

Paper Details

Date Published: 12 July 2019
PDF: 15 pages
Proc. SPIE 11058, Optics for Arts, Architecture, and Archaeology VII, 110580N (12 July 2019); doi: 10.1117/12.2528279
Show Author Affiliations
Ivan Zorin, Research Ctr. for Non-Destructive Testing GmbH (Austria)
Jakob Kilgus, Research Ctr. for Non-Destructive Testing GmbH (Austria)
Rong Su, The Univ. of Nottingham (United Kingdom)
Bernhard Lendl, Technische Univ. Wien (Austria)
Markus Brandstetter, Research Ctr. for Non-Destructive Testing GmbH (Austria)
Bettina Heise, Research Ctr. for Non-Destructive Testing GmbH (Austria)


Published in SPIE Proceedings Vol. 11058:
Optics for Arts, Architecture, and Archaeology VII
Haida Liang; Roger Groves, Editor(s)

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