TY - GEN
T1 - An instantaneous phase shifting digital shearography system for dynamic measurement
AU - Chen, T. Y.
AU - Chen, Y. C.
N1 - Funding Information:
This work is supported by National Science Council, Republic of China under the contract no. NSC-100-2221-E-006-077.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
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U2 - 10.1007/978-1-4614-4235-6_51
DO - 10.1007/978-1-4614-4235-6_51
M3 - Conference contribution
AN - SCOPUS:84869784863
SN - 9781461442349
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 369
EP - 373
BT - Imaging Methods for Novel Materials and Challenging Applications - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics
T2 - 2012 Annual Conference on Experimental and Applied Mechanics
Y2 - 11 June 2012 through 14 June 2012
ER -