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Proceedings Paper

The identification of chromophores in ancient glass by the use of UV-VIS-NIR spectroscopy
Author(s): W. Meulebroeck; K. Baert; H. Wouters; P. Cosyns; A. Ceglia; S. Cagno; K. Janssens; K. Nys; H. Terryn; H. Thienpont
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Paper Abstract

In this publication optical spectroscopy is considered to be a supplementary technique to study ancient colored glass. It results from a systematic study of the UV-VIS-NIR transmission spectra of intentionally colored glass fragments from various archaeological and historical sites and dated from the Roman period to the 21th century AD. The main goal consists of defining optical sensing parameters for this type of material. The considered colorants are iron, cobalt, manganese, copper and chromium. It is proved that many cases exist where optical spectroscopy can be seen as a straightforward, non-destructive, low-cost and in-situ applicable technique in identifying authentic material or to obtain information about the origin of the material. Possible sensing parameters are defined as the absence/presence of absorption bands characteristic for a specific coloring metal oxide and the spectral position of these bands. These parameters could reveal information about the applied furnace conditions and/or to the composition of the glass matrix. It is shown that the cobalt absorption band situated around 535 nm for soda rich glasses (Roman and industrial times) is shifted towards 526 nm for potash rich glasses (medieval and post-medieval times).

Paper Details

Date Published: 13 May 2010
PDF: 12 pages
Proc. SPIE 7726, Optical Sensing and Detection, 77260D (13 May 2010); doi: 10.1117/12.853666
Show Author Affiliations
W. Meulebroeck, Vrije Univ. Brussel (Belgium)
K. Baert, Vrije Univ. Brussel (Belgium)
H. Wouters, Vrije Univ. Brussel (Belgium)
P. Cosyns, Vrije Univ. Brussel (Belgium)
A. Ceglia, Vrije Univ. Brussel (Belgium)
S. Cagno, Univ. Antwerpen (Belgium)
K. Janssens, Univ. Antwerpen (Belgium)
K. Nys, Vrije Univ. Brussel (Belgium)
H. Terryn, Vrije Univ. Brussel (Belgium)
H. Thienpont, Vrije Univ. Brussel (Belgium)

Published in SPIE Proceedings Vol. 7726:
Optical Sensing and Detection
Francis Berghmans; Anna Grazia Mignani; Chris A. van Hoof, Editor(s)

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