Frequency-division multiplexing for multicomponent shearography

Show simple item record Bledowski, Ian A. - Charrett, Thomas O. H. - Francis, Daniel - James, Stephen W. - Tatam, Ralph P. - 2013-02-05T23:08:32Z 2013-02-05T23:08:32Z 2013-01-20T00:00:00Z -
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 -
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.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: 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 -

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