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.

Date Published: 24 November 2016
PDF: 6 pages
Proc. SPIE 10023, Optical Metrology and Inspection for Industrial Applications IV, 100231V (24 November 2016); doi: 10.1117/12.2246288

Published in SPIE Proceedings Vol. 10023:
Optical Metrology and Inspection for Industrial Applications IV
Sen Han; Toru Yoshizawa; Song Zhang, Editor(s)