An instantaneous phase shifting digital shearography system for dynamic measurement

T. Y. Chen, Y. C. Chen

研究成果: Conference contribution

摘要

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.

原文English
主出版物標題Imaging Methods for Novel Materials and Challenging Applications - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics
頁面369-373
頁數5
DOIs
出版狀態Published - 2013
事件2012 Annual Conference on Experimental and Applied Mechanics - Costa Mesa, CA, United States
持續時間: 2012 六月 112012 六月 14

出版系列

名字Conference Proceedings of the Society for Experimental Mechanics Series
3
ISSN(列印)2191-5644
ISSN(電子)2191-5652

Other

Other2012 Annual Conference on Experimental and Applied Mechanics
國家/地區United States
城市Costa Mesa, CA
期間12-06-1112-06-14

All Science Journal Classification (ASJC) codes

  • 工程 (全部)
  • 計算力學
  • 機械工業

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