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Proceedings Paper

Investigation of speckle displacement effects on speckle interferometry
Author(s): Yaozu Song; Ying Wu; Rudi Kulenovic; Manfred Groll
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Paper Abstract

In the experimental set-up for measuring temperature fields in fluid flows by using speckle interferometry ( e.g. electronic speckle pattern interferometry or phase shift speckle interferometry ), the part of the; arrangement for the object light beam is just like a subjective speckle photographic system. Therefore, in general, speckle displacements are generated. The speckle displacements can change the intensity distribution of spatial speckle fields. As a result, the intensity distribution of a speckle interferogram is also changed. In this paper the effect of speckle displacements on the speckle interferometry is analyzed and discussed in detail. A physical model and mathematical treatment for the effect are proposed. Experimental results are shown. A method for elimination of the effect is provided. Using the provided method, the temperature measurement error of speckle interferometry can be reduced and the measurement accuracy can also be increased.

Paper Details

Date Published: 17 July 1996
PDF: 9 pages
Proc. SPIE 2860, Laser Interferometry VIII: Techniques and Analysis, (17 July 1996); doi: 10.1117/12.276330
Show Author Affiliations
Yaozu Song, Tsinghua Univ. (China) and Univ. Stuttgart (China)
Ying Wu, Tsinghua Univ. (China)
Rudi Kulenovic, Univ. Stuttgart (Germany)
Manfred Groll, Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 2860:
Laser Interferometry VIII: Techniques and Analysis
Malgorzata Kujawinska; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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