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Proceedings Paper

Pseudo-phase information of complex analytic signal of speckle fields and its applications: microdisplacement measurement based on phase-only correlation in signal domain
Author(s): Wei Wang; Nobuo Ishii; Yoko Miyamoto; Mitsuo Takeda
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Paper Abstract

As an alternative to the intensity correlation technique used in conventional speckle metrology, we propose a new technique of displacement measurement based on spatial signal-domain phase-only correlation that makes use of the pseudo phase of the complex analytic signal generated from a Hilbert-filtered speckle pattern. Experimental results are presented that demonstrate the validity and the advantage of the proposed signal-domain phase-only correlation technique over the conventional intensity correlation technique.

Paper Details

Date Published: 10 September 2004
PDF: 6 pages
Proc. SPIE 5457, Optical Metrology in Production Engineering, (10 September 2004); doi: 10.1117/12.545443
Show Author Affiliations
Wei Wang, Univ. of Electro-Communications (Japan)
Nobuo Ishii, Univ. of Electro-Communications (Japan)
Yoko Miyamoto, Univ. of Electro-Communications (Japan)
Mitsuo Takeda, Univ. of Electro-Communications (Japan)

Published in SPIE Proceedings Vol. 5457:
Optical Metrology in Production Engineering
Wolfgang Osten; Mitsuo Takeda, Editor(s)

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