Application of fibre optic digital speckle interferometry to mural painting diagnostics

A fibre optic digital speckle pattern interferometer is reported for mural painting diagnostics. As a result, the influence of flaws and cracks on fringe patterns, characterizing the displacement fields of mural paintings, has been visualized in real time also in an outdoor environment. Preliminary tests establish that this method, by its flexibility and compactness, allows one to overcome some drawbacks of existing conventional arrangements in non-destructive testing of artworks.

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