Please use this identifier to cite or link to this item:
|Title:||Determination of curvature and twist by digital shearography and wavelet transforms|
|Authors:||Tay, C.J. |
|Source:||Tay, C.J., Fu, Y. (2005-11-01). Determination of curvature and twist by digital shearography and wavelet transforms. Optics Letters 30 (21) : 2873-2875. ScholarBank@NUS Repository. https://doi.org/10.1364/OL.30.002873|
|Abstract:||A new technique based on digital shearography for determining the transient curvature and twist of a continuously deforming object from a series of speckle patterns is presented. The intensity variation of each pixel is analyzed along the time axis by using a complex Morlet wavelet transform. The absolute sign of the phase variation is determined by introduction of a temporal carrier when the speckle patterns are captured by a high-speed camera. A high-quality spatial distribution of the deflection derivative is extracted at any instant without the need for temporal or spatial phase unwrapping. The continuous Haar wavelet transform is subsequently processed as a differentiation operator to reconstruct the instantaneous curvature and twist of a continuously deforming object. © 2005 Optical Society of America.|
|Source Title:||Optics Letters|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Dec 7, 2017
WEB OF SCIENCETM
checked on Nov 29, 2017
checked on Dec 11, 2017
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.