Frequency-division multiplexing for multicomponent shearography
| dc.contributor.author | Bledowski, Ian A. | - |
| dc.contributor.author | Charrett, Thomas O. H. | - |
| dc.contributor.author | Francis, Daniel | - |
| dc.contributor.author | James, Stephen W. | - |
| dc.contributor.author | Tatam, Ralph P. | - |
| dc.date.accessioned | 2013-02-05T23:08:32Z | |
| dc.date.available | 2013-02-05T23:08:32Z | |
| dc.date.issued | 2013-01-20T00:00:00Z | - |
| dc.description.abstract | A new method of multiplexing the speckle patterns needed in multicomponent digital shearography systems is presented. Frequency-division multiplexing (FDM) of the measurement channels is achieved by recording speckle patterns from objects illuminated by intensity-modulated sources. Each source is modulated at a discrete frequency, which is less than half of the camera frame rate, and a bank of images of the modulated speckle patterns is captured. This allows for pixel-by-pixel Fourier-based extraction of the individual speckle patterns from peaks in the power spectra. The approach is demonstrated with a two-component in-plane shearography instrument. | en_UK |
| dc.identifier.citation | Ian A. Bledowski, Thomas O. H. Charrett, Daniel Francis, Stephen W. James, and Ralph P. Tatam, Frequency-division multiplexing for multicomponent shearography, Applied Optics, 2013, Volume 52, Issue 3, Pages 350-358. | |
| dc.identifier.issn | 0003-6935 | - |
| dc.identifier.uri | http://dx.doi.org/10.1364/AO.52.000350 | - |
| dc.identifier.uri | http://dspace.lib.cranfield.ac.uk/handle/1826/7821 | |
| dc.language.iso | en_UK | - |
| dc.publisher | Osa Optical Society of America | en_UK |
| dc.rights | This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-52-3-350 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law | |
| dc.title | Frequency-division multiplexing for multicomponent shearography | en_UK |
| dc.type | Article | - |