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Proceedings Paper

Statistical Analysis Of Shearography
Author(s): Qiang Fang; Jiabi Chen; Yushan Tan
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Paper Abstract

Based on the principle of wave and statistical optics, shearography is analysed thoroughly. The auto-correlation function of the transmittance of the specklegram, which is the essence of speckle interference, is calculated. The ensamble average intensity distribution of the output fringe speckle field of the filtering system is derived. We have shown that, if some conditions are satisfied by the system parameters, better contrast of the fringe field will be obtained, but it still is a function of in-plane deformation fields and the system parameters. In addtion, we have found that the out-of-plane deformation gradient is measurable only when the in-plane deformation value is smaller than a value determined by system parameters.

Paper Details

Date Published: 17 February 1987
PDF: 7 pages
Proc. SPIE 0814, Photomechanics and Speckle Metrology, (17 February 1987); doi: 10.1117/12.941678
Show Author Affiliations
Qiang Fang, Xi'an Jiaotong University (China)
Jiabi Chen, Xi'an Jiaotong University (China)
Huazhong University of Science and Technology (China)
Yushan Tan, Xi'an Jiaotong University (China)

Published in SPIE Proceedings Vol. 0814:
Photomechanics and Speckle Metrology
Fu-Pen Chiang, Editor(s)

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