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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 11, Iss. 6 — Mar. 24, 2003
  • pp: 617–623

Dynamic electronic speckle pattern interferometry (DESPI) phase analyses with temporal Hilbert transform

Violeta Dimitrova Madjarova, Hirofumi Kadono, and Satoru Toyooka  »View Author Affiliations


Optics Express, Vol. 11, Issue 6, pp. 617-623 (2003)
http://dx.doi.org/10.1364/OE.11.000617


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Abstract

In this study, we propose the Hilbert transform (HT) method for phase analysis of a Dynamic ESPI signal. The data processing is performed in the temporal domain, using the temporal history of the interference signal at every single pixel. The final results give a temporal development of the two-dimensional deformation field. To reduce the influence of the fluctuations of bias intensity on the calculated phase, it was removed prior to performing the HT. This method was demonstrated for defects distinction and the determination of the sign change in the deformation field in two different experiments. The range of measurement lies between submicrons and tens of microns and the spatial resolution is better when compared to the fringe analysis method and the spatial carrier method.

© 2003 Optical Society of America

OCIS Codes
(100.2650) Image processing : Fringe analysis
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry

ToC Category:
Research Papers

History
Original Manuscript: February 3, 2003
Revised Manuscript: March 17, 2003
Published: March 24, 2003

Citation
Violeta Madjarova, Hirofumi Kadono, and Satoru Toyooka, "Dynamic electronic speckle pattern interferometry (DESPI) phase analyses with temporal Hilbert transform," Opt. Express 11, 617-623 (2003)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-11-6-617


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