Pseudo-phase information of complex analytic signal of speckle fields and its applications: microdisplacement measurement based on phase-only correlation in signal domain

Wei Wang; Nobuo Ishii; Yoko Miyamoto; Mitsuo Takeda

doi:10.1117/12.545443

10 September 2004 Pseudo-phase information of complex analytic signal of speckle fields and its applications: microdisplacement measurement based on phase-only correlation in signal domain

Wei Wang, Nobuo Ishii, Yoko Miyamoto, Mitsuo Takeda

Author Affiliations +

Proceedings Volume 5457, Optical Metrology in Production Engineering; (2004) https://doi.org/10.1117/12.545443
Event: Photonics Europe, 2004, Strasbourg, France

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.

Citation Download Citation

Wei Wang, Nobuo Ishii, Yoko Miyamoto, and Mitsuo Takeda "Pseudo-phase information of complex analytic signal of speckle fields and its applications: microdisplacement measurement based on phase-only correlation in signal domain", Proc. SPIE 5457, Optical Metrology in Production Engineering, (10 September 2004); https://doi.org/10.1117/12.545443

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