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Extended-range temporal electronic speckle pattern interferometry

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Quiroga Mellado, Juan Antonio and Servín Guirado, Manuel and Dávila Álvarez, Abundio (2002) Extended-range temporal electronic speckle pattern interferometry. Applied Optics, 41 (22). pp. 4541-4547. ISSN 1559-128X

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Official URL: http://dx.doi.org/10.1364/AO.41.004541


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Abstract

In recent years the availability of high-speed digital video cameras has motivated the study of electronic speckle pattern interferometry (ESPI) in the time domain. To this end a properly sampled temporal sequence off-fringe patterns is used to analyze the temporal experiment. Samples of temporal speckle images must fulfill the Nyquist criteria over the time axis. When the transient phenomena understudy are too fast, the required sampling frequency over time may not be fulfilled. In that case one needs to extend the measuring range of the algorithm used to extract the modulating phase. We analyze how to use short laser pulses or short video acquisition times with fairly long temporal separation among them to estimate the modulating phase of a dynamic ESPI experiment. The only requirement is that the modulating phase being estimated be properly sampled in the spatial domain.


Item Type:Article
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© 2002 Optical Society of America.
We acknowledge the valuable support of the Mexican Council of Science and Technology (CONACYT) as well as the support of the European Union Project INDUCE.BRPR-CT97-0805.

Uncontrolled Keywords:Transient Deformation Measurement, Displacement Measurement, Tv Holography, Phase, Camera
Subjects:Sciences > Physics > Optics
ID Code:23124
Deposited On:14 Oct 2013 08:56
Last Modified:07 Feb 2014 10:57

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