| dc.contributor.author |
Tay, Cho Jui. |
| dc.contributor.author |
Fu, Yu. |
| dc.date.accessioned |
2010-11-23T08:27:09Z |
| dc.date.available |
2010-11-23T08:27:09Z |
| dc.date.copyright |
2005 |
| dc.date.issued |
2010-11-23T08:27:09Z |
| dc.identifier.citation |
Tay. C. J., & Fu, Y. (2005). Determination of curvature and twist by digital shearography and wavelet transform. Optics Letters, 30(21), 2873-2875. |
| dc.identifier.issn |
0146-9592 |
| dc.identifier.uri |
http://hdl.handle.net/10220/6470 |
| dc.description.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. |
| dc.format.extent |
3 p. |
| dc.language.iso |
en |
| dc.relation.ispartofseries |
Optics Letters |
| dc.rights |
This paper was published in [Optics Letters] 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/ol/abstract.cfm?URI=ol-30-21-2873]. Systematic or multiple reproduction or distribution to multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
| dc.subject |
DRNTU::Science::Physics::Optics and light. |
| dc.title |
Determination of curvature and twist by digital shearography and wavelet transforms. |
| dc.type |
Journal Article |
| dc.contributor.research |
Temasek Laboratories |
| dc.identifier.doi |
http://dx.doi.org/10.1364/OL.30.002873 |
| dc.description.version |
Published version |
