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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 22 — Oct. 30, 2006
  • pp: 10195–10206

Optical vortex metrology based on the core structures of phase singularities in Laguerre-Gauss transform of a speckle pattern

Wei Wang, Tomoaki Yokozeki, Reika Ishijima, Mitsuo Takeda, and Steen G. Hanson  »View Author Affiliations

Optics Express, Vol. 14, Issue 22, pp. 10195-10206 (2006)

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A new technique for displacement measurement is proposed that makes use of phase singularities in the complex signal generated by a Laguerre-Gauss filter operation applied to a speckle pattern. The core structures of phase singularities are used as unique fingerprints attached to the object surface, and the displacement is determined by tracing the movement of registered phase singularities with their correspondence being identified by the fingerprints. Experimental results for translational and rotational displacement measurements are presented that demonstrate large dynamic range and high spatial resolution of the proposed optical vortex metrology.

© 2006 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(100.5070) Image processing : Phase retrieval
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging

ToC Category:
Coherence and Statistical Optics

Original Manuscript: June 14, 2006
Revised Manuscript: August 4, 2006
Manuscript Accepted: August 7, 2006
Published: October 30, 2006

Wei Wang, Tomoaki Yokozeki, Reika Ishijima, Mitsuo Takeda, and Steen G. Hanson, "Optical vortex metrology based on the core structures of phase singularities in Laguerre-Gauss transform of a speckle pattern," Opt. Express 14, 10195-10206 (2006)

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