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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 13 — Jul. 1, 2014
  • pp: 3722–3724

Estimation of phase derivatives using discrete energy separation algorithm in digital holographic interferometry

Rishikesh Kulkarni and Pramod Rastogi  »View Author Affiliations

Optics Letters, Vol. 39, Issue 13, pp. 3722-3724 (2014)

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This Letter proposes a new method for the estimation of the first- and second-order phase derivatives corresponding to strain and curvature from a single fringe pattern in digital holographic interferometry. The method is based on a discrete energy separation algorithm, which provides a biased phase derivative estimate in a noisy environment. Subsequently, the least-squares spline approximation with optimal number of knots selection technique is used to obtain the accurate estimation of phase derivatives. The accuracy and computational efficiency of the proposed method is validated with simulation and experimental results.

© 2014 Optical Society of America

OCIS Codes
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(090.1995) Holography : Digital holography

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: April 1, 2014
Revised Manuscript: May 6, 2014
Manuscript Accepted: May 8, 2014
Published: June 17, 2014

Rishikesh Kulkarni and Pramod Rastogi, "Estimation of phase derivatives using discrete energy separation algorithm in digital holographic interferometry," Opt. Lett. 39, 3722-3724 (2014)

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