Abstract

A method for measurement of continuous displacements that uses phase-shifting speckle interferometry is presented. The initial random phase of the speckle pattern is evaluated by phase shifting before deformation. The changing phase thereafter is evaluated from only one image at a time by a least-squares algorithm. The technique can be used for measuring transients and other dynamic events, heat expansion as well as other phenomena, for which it is difficult to accomplish phase shifting during deformation. Theory along with computer simulations and experimental results are described.

© 2000 Optical Society of America

Evaluation of two-dimensional displacement components of symmetrical deformation by phase-shifting electronic speckle pattern interferometry

Ping Sun
Appl. Opt. 46(15) 2859-2862 (2007)

Phase-shifting speckle interferometry

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Measurement of complex surface deformation by high-speed dynamic phase-stepped digital speckle pattern interferometry

James M. Kilpatrick, Andrew J. Moore, James S. Barton, Julian D. C. Jones, Mark Reeves, and Clive Buckberry
Opt. Lett. 25(15) 1068-1070 (2000)

Spatial versus temporal phase shifting in electronic speckle-pattern interferometry: noise comparison in phase maps

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Vibration measurement using phase-shifting speckle-pattern interferometry

Suezou Nakadate
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