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Optical Coherence Tomography: A non-invasive technique applied to conservation of paintings

Liang, H., Cid, M.G., Cucu, R., Dobre, George, Kudimov, B., Pedro, J., Saunders, D., Cupitt, J., Podoleanu, Adrian G.H. (2005) Optical Coherence Tomography: A non-invasive technique applied to conservation of paintings. In: SPIE Proceedings Series. Proceedings of SPIE - The International Society for Optical Engineering. 5857. pp. 1-9. Spie-Int Soc Optical Engineering (doi:10.1117/12.612591) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1117/12.612591

Abstract

It is current practice to take tiny samples from a painting to mount and examine in cross-section under a microscope. However, since conservation practice and ethics limit sampling to a minimum and to areas along cracks and edges of paintings, which are often unrepresentative of the whole painting, results from such analyses cannot be taken as representative of a painting as a whole. Recently in a preliminary study, we have demonstrated that near-infrared Optical Coherence Tomography (OCT) can be used directly on paintings to examine the cross-section of paint and varnish layers without contact and the need to take samples. OCT is an optical interferometric technique developed for in vivo imaging of the eye and biological tissues; it is essentially a scanning Michelson's interferometer with a 'broadband' source that has the spatial coherence of a laser. The low temporal coherence and high spatial concentration of the source are the keys to high depth resolution and high sensitivity 3D imaging. The technique is non-invasive and noncontact with a typical working distance of 2 cm. This non-invasive technique enables cross-sections to be examined anywhere on a painting. In this paper, we will report new results on applying near-infrared en-face OCT to paintings conservation and extend the application to the examination of underdrawings, drying processes, and quantitative measurements of optical properties of paint and varnish layers.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.612591
Uncontrolled keywords: 3D imaging, Art conservation, Confocal microscopy, Drying, Infrared imaging, Infrared reflectography, Low coherence interferometry, Optical coherence tomography, Paint, Refractive index, Varnish, Wetting, 3D imaging, Art conservation, Confocal microscopy, Infrared reflectography, Low coherence interferometry, Optical coherence tomography, Drying, Infrared imaging, Painting, Refractive index, Tomography, Varnish, Wetting, Coherent light
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 24 Jul 2015 15:08 UTC
Last Modified: 01 Aug 2019 10:39 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49760 (The current URI for this page, for reference purposes)
Dobre, George: https://orcid.org/0000-0002-5695-2591
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