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THz radiation is strongly absorbed, as well as reflected, by water. This spectral feature can be exploited to detect the presence of water under the surface of mural paintings and mosaics. In this study we report on the capability of our 3D reflective THz imaging system to detect water under samples simulating a fresco or a mosaic.
This work presents a simple electromagnetic model to deal with the reflection from buried interfaces and to provide the basis of a reconstruction strategy whose data are given in terms of the intensity of the THz signal, which arises from the interference of a reference signal with the one reflected by the probed sample.
The project THz-ARTE ldquoTerahertz Advanced Research TEchniques for non-invasive analysis in art conservationrdquo has recently been selected in the area of Technologies applied to Cultural Heritage in the framework of the Agreement between the Government of Italy and the Government of Japan on cooperation in Science and Technology.
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