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Proceedings Paper

Electronic speckle pattern interferometry using multimode fiber optic bundles for sensing measurement
Author(s): Wei Liu; Yushan Tan; Xianglin Wang
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Paper Abstract

In this paper, the systems and unique advantages for applying incoherent multimode fiber- optic bundles (MMBs) and coherent multimode image bundles to electronic speckle pattern interferometry (ESPI) are described. Fiber optics ESPI exhibits many advantages when compared to conventional ESPI. This study has shown that MMBs are much better than individual multimode fiber optic used in ESPI. By designing the structure of MMBs specially, we can adjust the number with any ratio for the object and reference beams in order to maximize the visibility of the ESPI fringes. Some other methods were used to improve the quality of the fringes. This paper also introduces a series of experiments which research the problems for applying MMBs ESPI to measure displacement, strain, and unbonded faults in the carbon/epoxy honeycomb components. All the experimental results agree well with the theory.

Paper Details

Date Published: 26 October 1992
PDF: 7 pages
Proc. SPIE 1814, Optical Sensors, (26 October 1992); doi: 10.1117/12.131278
Show Author Affiliations
Wei Liu, Xi'an Jiaotong Univ. (China)
Yushan Tan, Xi'an Jiaotong Univ. (China)
Xianglin Wang, Xi'an Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 1814:
Optical Sensors
Chih-Hong Chen; Tieh-Chu Wang, Editor(s)

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