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Ultrasonic Lamb waves detection using an unstabilized optical interferometer with uncalibrated phase shifts.
- Source :
-
Journal of Modern Optics . Apr2015, Vol. 62 Issue 7, p556-559. 4p. - Publication Year :
- 2015
-
Abstract
- We present an experimental and post-processing scheme that allows ultrasound surface wave detection by means of an unstabilized homodyne interferometric technique. We register interference signals for a set of uncalibrated phase shifts and, from them, we are able to retrieve the normal surface displacement of a thin aluminium plate. The results obtained with this technique are then compared to robust and more traditional phase recovery methods such as the Carré algorithm and the 11-step windowed discrete Fourier transform algorithm. For both algorithms, we found a correlation superior to 99.9%, when compared to the results of the proposed technique. This non-destructive testing scheme represents a simpler and less-expensive alternative to other existing laser ultrasonic techniques. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 09500340
- Volume :
- 62
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Modern Optics
- Publication Type :
- Academic Journal
- Accession number :
- 101384824
- Full Text :
- https://doi.org/10.1080/09500340.2014.992991