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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 25 — Sep. 1, 1999
  • pp: 5408–5412

Digital speckle-pattern interferometry: fringe retrieval for large in-plane deformations with digital speckle photography

Angelica Andersson, Anna Runnemalm, and Mikael Sjödahl  »View Author Affiliations


Applied Optics, Vol. 38, Issue 25, pp. 5408-5412 (1999)
http://dx.doi.org/10.1364/AO.38.005408


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Abstract

The compensation of large in-plane motions in digital speckle-pattern interferometry (DSPI) with the use of digital speckle photography (DSP) is demonstrated. Ordinary recordings of DSPI are recombined and analyzed with DSP. The DSP result is used to compensate for the bulk speckle motion prior to calculation of the phase map. This results in a high fringe contrast even for deformations of several speckle diameters. In addition, for the case of an in-plane deformation, it is shown that the absolute phase change in each pixel may be unwrapped by use of the DSP result as an initial guess. The principles of this method and experiments showing the in-plane rotation of a plate and the encounter of two rounded plates are presented.

© 1999 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry

History
Original Manuscript: February 17, 1999
Revised Manuscript: May 14, 1999
Published: September 1, 1999

Citation
Angelica Andersson, Anna Runnemalm, and Mikael Sjödahl, "Digital speckle-pattern interferometry: fringe retrieval for large in-plane deformations with digital speckle photography," Appl. Opt. 38, 5408-5412 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-25-5408

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