Terahertz time-domain reflectometry has been applied to the investigation of a medieval Danish wall painting. The technique has been able to detect the presence of carbonblack layer on the surface of the wall painting and a buried insertion characterized by high reflectivity values has been found in depth of the lime-based historical plaster.
Proceedings of the 38th International Conference on Infrared, Millimeter and Terahertz Waves Irmmw-thz 2013, 2013
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38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2013)