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In-fiber optical coherence tomograph for examination of paintings

Podoleanu, Adrian G.H., Liang, H., Cid, M.G., Cucu, R., Dobre, George, Pedro, J., Saunders, D.R. (2005) In-fiber optical coherence tomograph for examination of paintings. In: SPIE Proceedings Series. Proceedings of SPIE - The International Society for Optical Engineering. 6004. Spie-Int Soc Optical Engineering (doi:10.1117/12.630185) (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/10.1117/12.630185

Abstract

Scientific examinations of paintings are routinely carried out in major galleries and museums to assist in conservation treatment and as part of technical or art historical examinations. Care is taken to examine the paintings non-destructively as far as possible. However, in order to study the paint and varnish layers, it is still currently necessary to take tiny samples of a painting to examine the cross section of a small area of the painting under a microscope. In an attempt to solve this problem we evaluate the potential of optical coherence tomography (OCT) in providing high resolution information about paint layers. Two OCT systems have been assembled, operating at 850 nm and 1300 nm, each using two single mode in-fiber couplers. Both systems can produce A (reflectivity profile in depth), T (lateral reflectivity profile), B (cross section image) and C-scans (constant depth image). Using superluminiscent diodes, a depth resolution better than 9 microns is achieved. We present results of applying OCT to sample panels and paintings. We show that infrared OCT is capable of non-destructive examination of paintings in 3D, which shows not only the structure of the varnish layer but also the paint layers. The OCT images present better microscopic tomography of the surface of the varnish and paint layers than any system currently employed in the examination of paintings. OCT could also be used for accurate measurement of the thickness of the varnish layer on a painting.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.630185
Uncontrolled keywords: Art conservation, Confocal microscopy, Infrared imaging, Low coherence interferometry, Optical coherence tomography, Paint, Refractive index, Varnish, Image processing, Infrared imaging, Interferometry, Optical properties, Painting, Varnish, Art conservation, Confocal microscopy, Low coherence interferometry, Optical coherence tomography, Tomography
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 15:10 UTC
Last Modified: 01 Aug 2019 10:39 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49762 (The current URI for this page, for reference purposes)
Dobre, George: https://orcid.org/0000-0002-5695-2591
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