Standoff laser spectroscopy for wall paintings, monuments and architectural interiors

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Li, Y., Cheung, C.S., Kogou, S., Hogg, A., Liang, H. ORCID: 0000-0001-9496-406X and Evans, S., 2021. Standoff laser spectroscopy for wall paintings, monuments and architectural interiors. In: J. Bridgland, ed., Transcending boundaries: integrated approaches to conservation. ICOM-CC 19th Triennial Conference preprints, Beijing, 17–21 May 2021. Paris, France: International Council of Museums. ISBN 9782491997144

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Abstract

Multimodal analysis using complementary imaging and spectroscopic techniques is being increasingly adopted for the examination of materials in cultural heritage. However, practical limitations, such as inaccessible heights, hinder the use of conventional mobile instruments for in situ analysis of wall paintings. This paper presents a novel mobile standoff laser spectroscopy system that can operate in the range of 3-15 m. Small area standoff macro Raman mapping was performed in situ on a wall painting in the Royal Pavilion in Brighton, UK. The safety of standoff macro Raman mapping with regard to laser-induced degradation was evaluated on paint samples made from a range of common pigments. In addition, the combination of Raman spectroscopy and laser-induced breakdown spectroscopy (LIBS) enabled the depth-resolved study of multi-layered paintings, revealing elemental and molecular information for each layer.

Item Type:

Chapter in book

Creators:

Li, Y., Cheung, C.S., Kogou, S., Hogg, A., Liang, H. and Evans, S.

Publisher:

International Council of Museums

Place of Publication:

Paris, France

Date:

1 October 2021

ISBN:

9782491997144