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Proceedings Paper

Noninvasive measurements of damage of fresco paintings and icons by laser scanning vibrometer: experimental results on artificial samples and real works of art
Author(s): Paolo Castellini; Enrico Esposito; Nicola Paone; Enrico Primo Tomasini
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Paper Abstract

Frescoes and icons show analogies in terms of defects, both present layer-to-layer detachments and delaminations and surface cracks; the aim of this work is to develop a diagnostic system for the measurement of the defects position and size. After initial measurement set-ups based on accelerometers and impact hammers a novel system based on laser vibrometers and acoustic stimulation of structures to allow full remote and contactless investigation of detachments and delaminations has been developed. This paper presents a measurement procedure based on two subsequent scans of the work of art is employed; the first scan aims at finding defects positions the second one to characterize their resonant response. A new kind of exciters, namely piezo actuators, has been introduced in the measurement chain and its effectiveness in finding defects in icons will be demonstrated. Also an on field measurement session on large sample walls will be described along with the result obtained that show how efficient this technique has become.

Paper Details

Date Published: 1 June 1998
PDF: 10 pages
Proc. SPIE 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (1 June 1998); doi: 10.1117/12.307729
Show Author Affiliations
Paolo Castellini, Univ. degli Studi di Ancona (Italy)
Enrico Esposito, Univ. degli Studi di Ancona (Italy)
Nicola Paone, Univ. degli Studi di Ancona (Italy)
Enrico Primo Tomasini, Univ. degli Studi di Ancona (Italy)


Published in SPIE Proceedings Vol. 3411:
Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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