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Proceedings Paper

Optical coherence tomography of 19th century glass: facts and phantoms
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Paper Abstract

This paper investigates optical coherence tomography (OCT) as an advanced, non-invasive method for 2D and 3D imaging of the surface and subsurface morphology of glass cultural heritage. The OCT system used is a commercial ThorLabs Ganymede II spectral domain-Fourier domain system with a 930 nm center wavelength, axial resolution of 4-6 μm, and lateral resolution of 8 μm. Results from model alkali silicate glass artificially aged at 90°C and 90% RH allow distinction of real features from artifacts produced by the highly reflective glass, and serve as a basis for interpretation of deterioration phenomena. Analytical results from historical glass artifacts are focused on a group of musical glass flutes created in Paris by Claude Laurent between 1807 and 1848. OCT images are compared to results of destructive analysis of the same samples and objects by scanning electron microscopy with backscattered electron imaging of cross-sections, as well as non-invasive light microscopy and NIR fiber optic reflectance spectrometry, the latter of which yields complementary molecular information in terms of water vibrations in hydrated glass.

Paper Details

Date Published: 12 July 2019
PDF: 12 pages
Proc. SPIE 11058, Optics for Arts, Architecture, and Archaeology VII, 110580W (12 July 2019); doi: 10.1117/12.2526170
Show Author Affiliations
Lynn Brostoff, Library of Congress (United States)
Carol Lynn Ward Bamford, Library of Congress (United States)
Tara Diba, The George Washington Univ. (United States)
Andrew Buechele, The Catholic Univ. of America (United States)
Murray Loew, The George Washington Univ. (United States)
Jason Zara, The George Washington Univ. (United States)

Published in SPIE Proceedings Vol. 11058:
Optics for Arts, Architecture, and Archaeology VII
Haida Liang; Roger Groves; Piotr Targowski, Editor(s)

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