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Optical Coherence Tomography for Examination of Parchment Degradation

Góra, M; Pircher, M; Götzinger, E; Bajraszewski, T; Strlic, M; Kolar, J; Hitzenberger, C; (2006) Optical Coherence Tomography for Examination of Parchment Degradation. Laser Chemistry , 2006 p. 1. 10.1155/2006/68679. Green open access

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Abstract

A novel application of Optical Coherence Tomography utilizing infrared light of 830 nm central wavelength for non invasive examination of the structure of parchment, some covered with iron gall ink, is presented. It is shown that both the parchment and the ink applied are sufficiently transparent to light of this wavelength. In the study, Spectral OCT (SOCT) as well as Polarisation Sensitive OCT (PS-OCT) techniques were used to obtain cross-sectional images of samples of parchment based on scattering properties. The second technique was additionally employed to recover the birefringence properties and the optical axis orientations of the sample. It was shown that freshly produced parchment exhibits a degree of birefringence. However, this property declines with ageing, and samples of old parchment completely depolarise the incident light.

Type: Article
Title: Optical Coherence Tomography for Examination of Parchment Degradation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1155/2006/68679
Additional information: Imported via OAI, 7:29:00 31st Jan 2008
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/4952
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