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Dynamic phase evaluation in sparse-sampled temporal speckle pattern sequence |
Optics Letters, Vol. 36, Issue 4, pp. 526-528 (2011)
http://dx.doi.org/10.1364/OL.36.000526
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Abstract
The rapid progress of modern manufacturing technology has posed stringent requirements for inspecting techniques for vibration characterization and dynamic testing. Because of its simplicity, accuracy, and whole-field character, speckle interferometry has served as one of the major techniques for dynamic measurement, where normally a dense-sampled temporal speckle sequence is captured for phase retrieval using Fourier or wavelet transforms. In this Letter, a method is proposed for phase evaluation of sparse-sampled speckle patterns when the sampling rate is lower than two points per temporal cycle. Dynamic experiments using a high-speed camera demonstrated the effectiveness of the proposed method for complicated wrapped phase retrieval in electronic/digital speckle pattern interferometry.
© 2011 Optical Society of America
OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(090.2880) Holography : Holographic interferometry
(100.5070) Image processing : Phase retrieval
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: December 7, 2010
Revised Manuscript: January 7, 2011
Manuscript Accepted: January 14, 2011
Published: February 9, 2011
Citation
Y. H. Huang, Y. S. Liu, S. Y. Hung, C. G. Li, and Farrokh Janabi-Sharifi, "Dynamic phase evaluation in sparse-sampled temporal speckle pattern sequence," Opt. Lett. 36, 526-528 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-4-526
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