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- Title
SYNCHRONOUS MEASUREMENT OF OUT-OF-PLANE DISPLACEMENT AND SLOPES BY TRIPLE-OPTICAL-PATH DIGITAL SPECKLE PATTERN INTERFEROMETRY.
- Authors
Guo-Qing Gu; Gui-Zhong Xu; Bing Xu
- Abstract
This study proposes a triple-optical-path digital speckle pattern interferometry (DSPI) setup for measuring the full-field out-of-plane displacement and two orthogonal slopes simultaneously as well as independently. The designed setup contains one conventional out-of-plane speckle interferometer and two orthogonal mod- ified shearographic interferometers with dual-observation geometry. In the setup, one laser device is used as the coherent source, and three monochrome cameras placed along a single line are used as the image acquisition device. Three correlation fringe patterns, one out-of-plane displacement fringe pattern and two slope fringe patterns, are captured synchronously by three cameras, and then are analysed using the phase-shifting technique to extract the phase distributions. The examinations of a practical non-contact measurement and a non-destructive testing (NDT) application by using the proposed setup are carried out in this study.
- Subjects
MEASUREMENT; SPECKLE metrology; SPECKLE interferometry; SHEAROGRAPHY; LASER measurement
- Publication
Metrology & Measurement Systems, 2018, Vol 25, Issue 1, p3
- ISSN
2080-9050
- Publication type
Article
- DOI
10.24425/118159