Share Email Print

Optical Engineering

Integrating fringe projection and digital image correlation for high-quality measurements of shape changes
Author(s): Luis Felipe-Sesé; Philip Siegmann; Francisco A. Díaz; Eann A. Patterson
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

An approach for the measurement of surface displacement fields in three dimensions is presented based on the combination of two-dimensional digital image correlation with fringe projection. Only a single RGB image is required at each deformation state, thereby allowing real-time data acquisition, which is achieved using red speckle and projected blue fringes that are captured in the single image and separated using a Bayer filter. The approach allows both a perpendicular alignment relative to a flat reference surface and self-calibration, i.e., no calibration object is employed. The minimum measurement uncertainty of such a system is found to be 0.0083±0.00239 and 0.0238±0.0068 mm, respectively, for the in-plane and out-of-plane displacements. The potential of the approach is demonstrated for an elastic membrane undergoing large (5 to 20 mm) applied out-of-plane displacements, and the results show no significant difference (<1%) in the measured in-plane displacement fields compared with a commercially available system for stereoscopic digital image correlation.

Paper Details

Date Published: 9 April 2014
PDF: 9 pages
Opt. Eng. 53(4) 044106 doi: 10.1117/1.OE.53.4.044106
Published in: Optical Engineering Volume 53, Issue 4
Show Author Affiliations
Luis Felipe-Sesé, Univ. de Jaén (Spain)
Philip Siegmann, Univ. de Alcalá (Spain)
Francisco A. Díaz, Univ. de Jaén (Spain)
Eann A. Patterson, Univ. of Liverpool (United Kingdom)

© SPIE. Terms of Use
Back to Top