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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 17 — Aug. 16, 2010
  • pp: 18041–18046

Estimation of displacement derivatives in digital holographic interferometry using a two-dimensional space-frequency distribution

G. Rajshekhar, Sai Siva Gorthi, and Pramod Rastogi  »View Author Affiliations


Optics Express, Vol. 18, Issue 17, pp. 18041-18046 (2010)
http://dx.doi.org/10.1364/OE.18.018041


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Abstract

The paper introduces a two-dimensional space-frequency distribution based method to directly obtain the unwrapped estimate of the phase derivative which corresponds to strain in digital holographic interferometry. In the proposed method, a two-dimensional pseudo Wigner-Ville distribution of the reconstructed interference field is evaluated and the peak of the distribution provides information about the phase derivative. The presence of a two-dimensional window provides high robustness against noise and enables simultaneous measurement of phase derivatives along both spatial directions. Simulation and experimental results are presented to demonstrate the method’s applicability for phase derivative estimation.

© 2010 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(090.1995) Holography : Digital holography

ToC Category:
Holography

History
Original Manuscript: June 4, 2010
Revised Manuscript: August 2, 2010
Manuscript Accepted: August 3, 2010
Published: August 6, 2010

Citation
G. Rajshekhar, Sai Siva Gorthi, and Pramod Rastogi, "Estimation of displacement derivatives in digital holographic interferometry using a two-dimensional space-frequency distribution," Opt. Express 18, 18041-18046 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-17-18041


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References

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