mirage

Wavelet analysis of digital shearing speckle patterns with a temporal carrier.

DSpace/Manakin Repository

 

Search DR-NTU


Advanced Search Subject Search

Browse

My Account

Wavelet analysis of digital shearing speckle patterns with a temporal carrier.

Show full item record

Title: Wavelet analysis of digital shearing speckle patterns with a temporal carrier.
Author: Quan, Chenggen.; Fu, Yu.; Miao, Hong.
Copyright year: 2006
Abstract: Shearography is an optical technique allows direct measurement of deflection derivatives. This paper presents a novel temporal phase analysis technique based on wavelet transform when shearography is applied to measure a continuously deforming object. A series of shearing speckle patterns is captured by a high-speed camera during the deformation. To avoid the phase ambiguity problem, a temporal carrier is generated by a piezoelectrical transducer (PZT) stage in one beam of the modified Michelson interferometer. The intensity variation of each pixel on recorded images is then analyzed along time axis by a robust mathematical tool - complex Morlet wavelet transform. After the temporal carrier is removed, the absolute phase change representing the first-order derivative of the continuous deformation is obtained without the need of temporal or spatial phase unwrapping process. The results obtained by wavelet transform are compared with those from temporal Fourier transform.
Subject: DRNTU::Science::Physics::Optics and light.
Type: Journal Article
Series/ Journal Title: Optics communications
Research Centre: Temasek Laboratories
Rights: This is the author created version of a work that has been peer reviewed and accepted for publication by Optics Communications, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:http://dx.doi.org/10.1016/j.optcom.2005.10.023].
Version: Accepted version

Files in this item

Files Size Format View
Wavelet analysi ... ith a temporal carrier.pdf 456.3Kb PDF View/Open
   

DOI Query

- Get published version (via Digital Object Identifier)
   

This item appears in the following Collection(s)

Show full item record

Statistics

Total views

All Items Views
Wavelet analysis of digital shearing speckle patterns with a temporal carrier. 255

Total downloads

All Bitstreams Views
Wavelet analysis of digital shearing speckle patterns with a temporal carrier.pdf 161

Top country downloads

Country Code Views
United States of America 64
China 39
Singapore 25
Russian Federation 5
Japan 4

Top city downloads

city Views
Mountain View 56
Beijing 25
Singapore 25
Rochester 2
San Francisco 2

Downloads / month

  2014-02 2014-03 2014-04 total
Wavelet analysis of digital shearing speckle patterns with a temporal carrier.pdf 0 0 2 2