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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 35 — Dec. 10, 2003
  • pp: 7066–7071

Phase Retrieval in Digital Speckle Pattern Interferometry by Use of a Smoothed Space-Frequency Distribution

Alejandro Federico and Guillermo H. Kaufmann  »View Author Affiliations


Applied Optics, Vol. 42, Issue 35, pp. 7066-7071 (2003)
http://dx.doi.org/10.1364/AO.42.007066


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Abstract

We evaluate the use of a smoothed space-frequency distribution (SSFD) to retrieve optical phase maps in digital speckle pattern interferometry (DSPI). The performance of this method is tested by use of computer-simulated DSPI fringes. Phase gradients are found along a pixel path from a single DSPI image, and the phase map is finally determined by integration. This technique does not need the application of a phase unwrapping algorithm or the introduction of carrier fringes in the interferometer. It is shown that a Wigner-Ville distribution with a smoothing Gaussian kernel gives more-accurate results than methods based on the continuous wavelet transform. We also discuss the influence of filtering on smoothing of the DSPI fringes and some additional limitations that emerge when this technique is applied. The performance of the SSFD method for processing experimental data is then illustrated.

© 2003 Optical Society of America

OCIS Codes
(100.5070) Image processing : Phase retrieval
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry

Citation
Alejandro Federico and Guillermo H. Kaufmann, "Phase Retrieval in Digital Speckle Pattern Interferometry by Use of a Smoothed Space-Frequency Distribution," Appl. Opt. 42, 7066-7071 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-35-7066


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References

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