Evaluation of 3D displacement components by combining DSCM with ESPI

Ping Sun; Kai Shi; Mingyong Sun; Haibin Sun

doi:10.1117/12.2246288

24 November 2016 Evaluation of 3D displacement components by combining DSCM with ESPI

Ping Sun, Kai Shi, Mingyong Sun, Haibin Sun

Proceedings Volume 10023, Optical Metrology and Inspection for Industrial Applications IV; 100231V (2016) https://doi.org/10.1117/12.2246288
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

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.

Citation Download Citation

Ping Sun, Kai Shi, Mingyong Sun, and 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); https://doi.org/10.1117/12.2246288

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KEYWORDS

Speckle pattern

3D metrology

3D image processing

Speckle

Interferometry

Phase shifts

CCD cameras

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