Internal structure observation of artefacts using electromagnetic waves from microwave to near infrared

Speaker:
Fukunaga, Kaori; National Institute of ICT; Japan

Authors:
Fukunaga, K.; National Institute of Information and Communications Technology; Japan
Shiga, N.; National Institute of Information and Communications Technology; Japan
Yasuda, S.; National Institute of Information and Communications Technology; Japan
Isoda, F.; National Institute of Information and Communications Technology; Japan

ID: ECNDT-0056-2018
Download: PDF
Session: Art and Cultural Heritage
Room: R2
Date: 2018-06-12
Time: 15:40 - 16:00

Electromagnetic waves have been used for non-destructive investigation in heritage science. Microwave ground penetrating radar is commonly used to detect objects underground by archaeologists, and we extended frequency to apply the technique to building inspection. A new distance-monitoring system for the ground penetrating rader is also proposed. The use of millimeter wave is still limited, but the frequency band around 100 GHz can clearly show the separation between tiles and mortar layer, as well as mortar and concrete wall. THz and infrared regions are used to examine paintings, and in this paper we introduced the thickness of giornata layer of a fresco painting by THz time domain imaging. In infrared region, optical coherent tomography (OCT) has been apllied to varnish inspection of paintings, and we applied the same technique to musical instruments. The thickness and condition of varnish often determine the value of musical instruments, the information would be important not only for historians or conservators, but also merchants. Based on practical experimental data, we discuss the role of each frequency band in the research field of heritage science.