Open AccessPhase shifting speckle interferometry for dynamic phenomena
Author(s) -
Luigi Bruno,
Andrea Poggialini
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.004665
Subject(s) - speckle pattern , optics , electronic speckle pattern interferometry , speckle imaging , interferometry , phase (matter) , phase modulation , phase retrieval , speckle noise , amplitude , computer science , intensity (physics) , physics , modulation (music) , phase noise , fourier transform , acoustics , quantum mechanics
The paper presents an algorithm able to retrieve the phase in speckle interferometry by a single intensity pattern acquired in a deformed state, provided that the integrated speckle field is resolved in the reference condition in terms of mean intensity, modulation amplitude and phase. The proposed approach, called throughout the paper "one-step", can be applied for studying phenomena whose rapid evolution does not allow the application of a standard phase-shifting procedure, which, on the other hand, must be applied at the beginning of the experiment. The approach was proved by an experimental test reported at the end of the paper.