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4. 3D terahertz scanner
The second THz imaging device used to analyze heritage objects is based on the continuous emission of a millimeter-wavelength electromagnetic wave (sub-THz range) coupled with incoherent thermal detection. The device, developed in close collaboration with the ALPhANOV optics and lasers technology center in Bordeaux, enables objects to be viewed in three dimensions (3D imaging) following a digital volume reconstruction process. This involves the use of a THz scanner, comparable in its mode of operation to the X-ray scanner commonly used in medical imaging.
4.1 Technical description
The THz scanner is simple to use. It requires a single THz beam to illuminate the object (point-by-point imaging performed by moving the beam or the object itself) and then measure...
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3D terahertz scanner
Outlook and developments
Bibliography
Directory
Laboratories – Design offices – Research centers
LOMA (Laboratoire Ondes et Matière d'Aquitaine), CNRS UMR 5798, Université Bordeaux 1 http://www.loma.cnrs.fr
C2RMF (Centre de Recherche et de Restauration des Musées de France) http://www.c2rmf.fr
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Digital media
Database
Database (RIKEN and NICT, Japan): THz spectra of common materials (heritage and others) http://www.thzdb.org/
Websites
Musée d'Aquitaine (Bordeaux) http://www.bordeaux.fr/p63908/musee-d-aquitaine
Uffizi Gallery (Florence) http://www.uffizi.firenze.it/en/index.php
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