Measurement of time-dependent displacement using dual speckle pattern phase-shifting TV holography

Christopher T. Griffen; Fang Chen; Y.Y. Hung

doi:10.1117/12.216850

18 August 1995 Measurement of time-dependent displacement using dual speckle pattern phase-shifting TV holography

Christopher T. Griffen, Fang Chen, Y.Y. Hung

Proceedings Volume 2622, Optical Engineering Midwest '95; (1995) https://doi.org/10.1117/12.216850
Event: Optical Engineering Midwest '95, 1995, Chicago, IL, United States

Abstract

This paper presents a method for measuring time dependent displacement using a dual speckle pattern acquisition and single camera TV holographic system. Two speckle patterns with 90 degree phase difference are acquired simultaneously. As the displacement changes with respect to time, a series of dual speckle patterns can be digitized into a computer image processing system. A Fourier transformation is used to remove the DC terms of the speckle patterns. A phase unwrapping algorithm is employed to calculate the phase distribution related to the time dependent displacement. The theoretical concept together with experimental simulation are presented.

Citation Download Citation

Christopher T. Griffen, Fang Chen, and Y.Y. Hung "Measurement of time-dependent displacement using dual speckle pattern phase-shifting TV holography", Proc. SPIE 2622, Optical Engineering Midwest '95, (18 August 1995); https://doi.org/10.1117/12.216850

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