Optical Coherence Tomography for Tracking Canvas Deformation

Targowski, Piotr; Góra, Michalina; Bajraszewski, Tomasz; Szkulmowski, Maciej; Rouba, Bogumiła; Łękawa-Wysłouch, Teresa; Tymińska-Widmer, Ludmiła

doi:https://doi.org/10.1155/2006/93658

Laser Chemistry

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Lasers in the Preservation of Cultural Heritage

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Research Article | Open Access

Volume 2006 | Article ID 093658 | https://doi.org/10.1155/2006/93658

Optical Coherence Tomography for Tracking Canvas Deformation

Piotr Targowski,¹Michalina Góra,¹Tomasz Bajraszewski,¹Maciej Szkulmowski,¹Bogumiła Rouba,²Teresa Łękawa-Wysłouch,²and Ludmiła Tymińska-Widmer²

Academic Editor: Costas Fotakis

Received16 Sept 2006

Revised28 Nov 2006

Accepted29 Nov 2006

Published22 Jan 2007

Abstract

Preliminary results of the application of optical coherence tomography (OCT), in particular in its spectral mode (SOCT), to tracking of deformations in paintings on canvas caused by periodical humidity changes are presented. The setup is able to monitor the position of a chosen point at the surface of a painting with micrometre precision, simultaneously in three dimensions, every 100 seconds. This allows recording of deformations associated with crack formation. For the particular painting model examined, it was shown that the surface moves in-plane towards the corner, and bulges outwards (Z-direction) in response to a rise in humidity. Subsequent to the first humidification/drying cycle, translation in the Z-direction is decreased, whilst in-plane translations increase somewhat. It was also shown that the response of the painting on canvas begins immediately on changing the relative humidity in the surroundings.

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Copyright

Copyright © 2006 Piotr Targowski et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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