20 March 1997 Two in-plane displacement components measurement by real-time ESPI/DSPI
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Proceedings Volume 2921, International Conference on Experimental Mechanics: Advances and Applications; (1997) https://doi.org/10.1117/12.269850
Event: International Conference on Experimental Mechanics: Advances and Applications, 1996, Singapore, Singapore
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.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peng Zhou, Peng Zhou, Yu Wang, Yu Wang, Boqin Xu, Boqin Xu, Xiaoping Wu, Xiaoping Wu, "Two in-plane displacement components measurement by real-time ESPI/DSPI", Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269850; https://doi.org/10.1117/12.269850
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