Bandyopadhyay, A, Bertling, K, Garg, D et al. (10 more authors) (2021) Sub-surface damage detection in marble structures using THz time domain and laser feedback interferometric imaging. In: Proceedings of SPIE - The International Society for Optical Engineering. SPIE OPTICAL METROLOGY, 21-26 Jun 2021, Online. SPIE ISBN 9781510644021
Abstract
This present collaborative research, undertaken in two different hemispheres, in an effort to address the challenge of early structural and sub-surface assessment of heritage marble architectures, like the Taj Mahal, using two complementary non-contact, non-invasive imaging techniques in the THz spectral range. In our previous work, it was already demonstrated that the complementary techniques of broadband Terahertz Time Domain Imaging (THz-TDI) and microRaman spectroscopy are successful in probing volume and surface damage in marble with Pietra-dura work. In the present work, the unique combination of THz-TDI and highly sensitive THz-Laser Feedback Interferometry (THz-LFI) have been explored to study sub-surface damage and irregularities of marble structures with Pietra-dura motif. These optical techniques hold immense possibility in large-scale architectural restoration projects as they collectively provide accurate structural depth profile up to several inches into the volume of the marble including the strain generated within the structure leading to potential cracks.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Terahertz, time domain imaging, spectroscopic imaging, THz-laser feedback interferometry, quantum cascade laser, sub-surface damage, marble, Taj Mahal |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM) > Specialist Science Education Dept (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Oct 2021 13:26 |
Last Modified: | 06 Oct 2021 05:52 |
Status: | Published |
Publisher: | SPIE |
Identification Number: | 10.1117/12.2592548 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:178855 |