FOURIER-BASED DIGITAL LASER PHOTOGRAPHY - A MONITORING-SYSTEM FOR STONE DAMAGE

Authors
PAOLETTI D SPAGNOLO GS
Citation
D. Paoletti et Gs. Spagnolo, FOURIER-BASED DIGITAL LASER PHOTOGRAPHY - A MONITORING-SYSTEM FOR STONE DAMAGE, Measurement science & technology, 5(8), 1994, pp. 925-929
Citations number
16
Categorie Soggetti
Instument & Instrumentation",Engineering
Journal title
Measurement science & technology → ACNP
ISSN journal
09570233
Volume
5
Issue
8
Year of publication
1994
Pages
925 - 929
Database
ISI
SICI code
0957-0233(1994)5:8<925:FDLP-A>2.0.ZU;2-M
Abstract
A digital double-exposure speckle system is developed for in situ meas urements of in-plane displacements or deformations. A fast Fourier tra nsform algorithm with an inexpensive computer is applied to obtain fri nge patterns of Young's type. Some applications of the method to stone samples under mechanical stresses, for determining the extent of move ments in the vicinity of pre-deteriorated areas, like cracks, are repo rted.