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2D and 3D non-destructive evaluation of a wooden panel painting using shearography and terahertz imaging

: Groves, R.M.; Pradarutti, B.; Kouloumpi, E.; Osten, W.; Notni, G.


NDT & E International 42 (2009), Nr.6, S.543-549
ISSN: 0963-8695
Fraunhofer IOF ()
terahertz imaging; shearography; art conservation; structural diagnostic

Structural diagnostics information about artwork is commonly obtained by adapting and applying non-destructive testing techniques from engineering. Shearography is a technique well known for type inspection, and for structural analysis in automotive, aerospace and industrial applications. In art conservation, a limited number of shearography sensors are in use at museums and research institutes throughout the world for detecting surface and sub-surface defects. Terahertz imaging is a new and rapidly developing non-destructive testing technique that has so far found application mainly for security. The aim of this study is to measure a complex object, a wooden panel painting using both techniques and to determine the capability of a combined sensor for cultural heritage applications.