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Proceedings Paper

Two in-plane displacement components measurement by real-time ESPI/DSPI
Author(s): Peng Zhou; Yu Wang; Boqin Xu; Xiaoping Wu
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Paper Abstract

ESPI/DSPI has real time subtraction function and has been used to measure fast deformation. But usually, ESPI/DSPI can not simultaneously acquire two frames which is needed for recording two displacement components (U, V) of in-plane fast deformation. In our experimental setup, the specimen is illuminated by 4 beams symmetrical to normal z. Two beams lie on x-z (y-z) plane with y (x) polarization. By using of a Wollaston prism, two speckle patterns are shifted without overlap. Only one CCD camera is adequate to capture these two patterns as one frame at the same time. An image processing system is used to get fringes patterns as U an V contours real-timely. A strip specimen has been studied by this method.

Paper Details

Date Published: 20 March 1997
PDF: 5 pages
Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269850
Show Author Affiliations
Peng Zhou, Univ. of Science and Technology of China (China)
Yu Wang, Univ. of Science and Technology of China (China)
Boqin Xu, Univ. of Science and Technology of China (China)
Xiaoping Wu, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 2921:
International Conference on Experimental Mechanics: Advances and Applications
Fook Siong Chau; C. T. Lim, Editor(s)

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