Terahertz Scanner Reveals Images beneath a Hidden Fresco

Terahertz Scanner Reveals Images beneath a Hidden Fresco

A technique similar to the kind of technology used in airport scanners has revealed images of a hidden fresco at the Louvre museum in Paris. Trois Hommes Armes de Lances was a known fresco forged by Giampetro Campana on a wall during roman times.

The new research revealed that a real Roman Fresco lies under that forgery. Bianca Jackson of the University of Rochester in the US announced the discovery at the American Chemical Society meeting. Terahertz waves have the ability to penetrate materials without causing any damage to them.

The use of waves has been incorporated in suite of tools to have better examination of cultural heritage. Terahertz light is safe and lies between infrared light and the microwaves in the appliance.

It is widely used in the scanning technology at airports and museums' back rooms because of the ability to provide better information without any risk of damage.

"It's very desirable for cultural heritage conservation because with a lot of other techniques like X-ray or ultraviolet, there is some molecular breakdown in the materials", Dr. Jackson told the meeting.

Dr. Jackson and her colleagues were asked to use terahertz imaging to find out what lay beneath. After a bit of data processing, they were able to find images of a figure beneath. The figure appeared to have two eyes, eyebrows, nose, mouth, a shadow of a chin.

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