Acta Photonica Sinica, Volume. 47, Issue 2, 212002(2018)
Dynamic Deformation Measurement of Discontinuous Surfaces Using Digital Speckle Pattern Interferometry and Spatiotemporal Threedimensional Phase Unwrapping
Digital Speckle Pattern Interferometry (DSPI) with a Spatiotemporal Threedimensional Phase Unwrapping (STPU) is used to measure the dynamic deformation distributions with the presence of object discontinuities. It overcomes the phase unwrapping failure of traditional DSPI in such conditions. Elaborate description of the measurement priciple and procedure of the DSPI with STPU is given. The experiments exibited that dynamic deformation of discontinuous surface, with a maximum deformation rate of 25.12 μm/s, can be determined perfectly by the proposed method while an ordinary camera with 70 fps was used. The research benefits the enlargement of the application areas of DSPI and the improvement of its applicability.
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WU Sijin, YANG Jing, PAN Siyang, LI Weixian, YANG Lianxiang. Dynamic Deformation Measurement of Discontinuous Surfaces Using Digital Speckle Pattern Interferometry and Spatiotemporal Threedimensional Phase Unwrapping[J]. Acta Photonica Sinica, 2018, 47(2): 212002
Received: Jul. 25, 2017
Accepted: --
Published Online: Jan. 30, 2018
The Author Email: Sijin WU (swu@bistu.edu.cn)