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Proceedings Paper

Measurement of the micro-displacement of metal bar with ESPI-phaseshift method
Author(s): Zhu Zheng; Li Chen; Zhibing Sun
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Paper Abstract

The technology for the measurement of a micro-displacement with ESPI-Phaseshift method has been introduced in the paper. In order to measure a micro-displacement, the technology gets laser speckle pattern interferometric information (i.e. phase information) from sample object surface in different loads with CCD camera. The phase information will be transformed into displacement information by relevant software. The micro-displacement is measured consequently. The measurement result of a sample metal bar which is fixed on one side and loaded randomly on the other side is presented in the paper. Experimental result matches well with theoretical calculation. The technology presented in the paper has higher precision than that of traditional methods, and the experimental conditions for the technology are easy to achieve.

Paper Details

Date Published: 17 January 2008
PDF: 7 pages
Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 67234Y (17 January 2008); doi: 10.1117/12.783691
Show Author Affiliations
Zhu Zheng, Guangdong Univ. of Technology (China)
Li Chen, Guangdong Univ. of Technology (China)
Zhibing Sun, Guangdong Univ. of Technology (China)


Published in SPIE Proceedings Vol. 6723:
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Junhua Pan; James C. Wyant; Hexin Wang, Editor(s)

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