Article | REF: RE213 V1

Terahertz radiation for the analysis of cultural heritage materials

Authors: Julien LABAUNE, Emmanuel ABRAHAM

Publication date: February 10, 2013 | Lire en français

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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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