Physics – Optics
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1236...57g&link_type=abstract
INTERNATIONAL CONFERENCE ON ADVANCED PHASE MEASUREMENT METHODS IN OPTICS AND IMAGING. AIP Conference Proceedings, Volume 1236,
Physics
Optics
Speckle, Interferometry, Pattern Recognition, Optical Beam Splitters, Piezoelectric Transducers, Speckle And Moire Patterns, Phase Shifting Interferometry, Pattern Recognition, Reflectors, Beam Splitters, And Deflectors, Piezoelectric And Ferroelectric Transducers
Scientific paper
Digital speckle pattern interferometry (DSPI) is a kind of interferometric technique for the measurement of deformation of objects. Temporal phase-shifting (TPS) technique has been applied for extracting quantitative deformation data from the fringe patterns. Butterworth low-pass filter based on discrete cosine transform (DCT), a frequency domain filter, has been applied to remove the fringe patterns noise in this study. It is shown that the Butterworth filter is able to remove the fringe patterns noise to the large extent. Theoretical and experimental results on an edge clamped circular aluminum plate subjected to a central concentrated loading for out-of-plane displacement measurement are presented in this paper.
Gu G. Q.
Wang Ke-Fan
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