A THz Scanner to Detect Moisture on Wood Samples

Manuel Greco, Fabio Leccese, Emilio Giovenale, Luca Senni, Andrea Taschin, Andrea Doria

Abstract

In recent years, the use of terahertz techniques in the field of cultural heritage has increased significantly. Due to the low energy of the THz photon, these techniques are non-destructive, non-invasive and non-ionising.<BR />Moreover, terahertz radiation is sensitive to water, so it could be used in the field of cultural heritage to detect water seepage underneath mosaics and frescoes, thus avoiding the formation of salts that would inevitably lead to the detachment of both mosaic tesserae and portions of frescoes. Furthermore, unlike IR reflectography, a technique capable of detecting the presence of underdrawings, THz imaging and spectroscopy techniques are able to have a greater penetration into matter, thus enabling additional information about the artwork to be obtained.<BR />The objective of this study is to detect moisture in a pine wood sample using a 97 GHz terahertz imaging system.

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IMEKO-MetroArchaeo-2023-107.pdf

DOI

10.21014/tc4-ARC-2023.107

IMEKO TC

TC4 - Measurement of Electrical Quantities

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