24 November 2016 Evaluation of 3D displacement components by combining DSCM with ESPI
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A method for three-dimensional (3-D) deformation measurement is presented by combining Digital Speckle Correlation Method (DSCM) with Electronic Speckle Pattern Interferometry (ESPI). The combination is completed based on a typical ESPI system, in which the reference light is controlled to turn on or shut down. The in-plane displacement components are obtained by using DSCM when the reference light is shut. A phase shifting ESPI is formed when the reference light is used, which can be used for the measurement of the out-plane displacement component. A typical three-point-bending experiment is completed. Experiment results show that the three displacement components can be obtained by the combination effectively.
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Ping Sun, Kai Shi, Mingyong Sun, Haibin Sun, "Evaluation of 3D displacement components by combining DSCM with ESPI", Proc. SPIE 10023, Optical Metrology and Inspection for Industrial Applications IV, 100231V (24 November 2016); doi: 10.1117/12.2246288; https://doi.org/10.1117/12.2246288


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