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Proceedings Paper

Special Ronchi grating as the shearing element of shearing ESPI for nondestructive testing
Author(s): Xiaoping Wu; Shaojun Fu; Lin-yong Pang
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Paper Abstract

A new electronic shearing speckle pattern interferometry using a special Ronchi grating as the shearing element has been developed and applied to deformation measurement and non destructive testing (NDT) in the practical environment. This special designed Ronchi grating is a kind of phase grating. It can make zero order and all even order beams disappear and among all odd order beams the +/- 1 order beams are much stronger than others. This new shearing element has many advantages, such as small volume, light weight, lower price, lower energy lost and good quality of shearing image. The experimental results show that it is good at electronic shearography.

Paper Details

Date Published: 20 March 1997
PDF: 4 pages
Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269865
Show Author Affiliations
Xiaoping Wu, Univ. of Science and Technology of China (China)
Shaojun Fu, National Lab. of Synchrotron Radiation (China)
Lin-yong Pang, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 2921:
International Conference on Experimental Mechanics: Advances and Applications
Fook Siong Chau; C. T. Lim, Editor(s)

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