Fringe analysis for moire interferometry by modification of the local intensity histogram and use of a two-dimensional Fourier transform method

Year: 2000

Authors: De Nicola S., Ferraro P., Gurov I., Koviazin R., Volkov M.

Autors Affiliation: Istituto di Cibernetica del CNR, via Toiano 6, Arco Felice, I-80072, Italy;
Istituto Nazionale di Ottica Applicata, Sezione di Napoli, Italy;
Institute of Fine Mechanics and Optics (Technical University), 14 ulitsa Sablinskaya, Sankt Petersburg, 197101, Russia;

Abstract: A noise-immune method for phase retrieval of a single moiré interferometric fringe pattern is presented and discussed. The method is shown to provide accurate recovery of the phase information by a combined method based on modification of the local intensity histogram and use of a two-dimensional Fourier transform of the enhanced moiré fringe pattern. The principle of the method is described and the experimental results of moiré interferometric measurements with submicrometre sensitivity of the in-plane displacement fields of thick carbon fibre/PEEK composite laminates are presented as an example of the application of the technique.

Journal/Review: MEASUREMENT SCIENCE & TECHNOLOGY

Volume: 11 (9)      Pages from: 1328  to: 1334

KeyWords: moiré interferometry; fringe analysis; local intensity histogram; Fourier transform; phase recovering

Citations: 22
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