An instantaneous phase shifting digital shearography system for dynamic measurement

T. Y. Chen, Y. C. Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To facilitate the applicability of phase shifting digital shearography for dynamic deformation measurement, a digital shearography measurement system that is capable to capture the two phase-shifted interferometric images instantaneously is developed. The new polarization phase-shifting interferometric system is verified by using Jones matrices. A composite optics designed allows the two phase-shifted images to be captured by one CCD simultaneously. By taking two images before and two images after the deformation, the four images were adjusted to the same gray level, and the pixel position mismatch among the images was corrected by digital image correlation method. Thereafter, the phase at each pixel was calculated. Test of the system on a force exerted disk and a heated disk was demonstrated. The results reveal that the system is applicable for dynamic measurement. However, the phase map is too noisy for phase unwraping, and further study is required.

Original languageEnglish
Title of host publicationImaging Methods for Novel Materials and Challenging Applications - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics
Pages369-373
Number of pages5
DOIs
Publication statusPublished - 2013 Jan 1
Event2012 Annual Conference on Experimental and Applied Mechanics - Costa Mesa, CA, United States
Duration: 2012 Jun 112012 Jun 14

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume3
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

Other2012 Annual Conference on Experimental and Applied Mechanics
CountryUnited States
CityCosta Mesa, CA
Period12-06-1112-06-14

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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