Electronic speckle pattern interferometry using multimode fiber optic bundles for sensing measurement

Wei Liu; Yushan Tan; Xianglin Wang

doi:10.1117/12.131278

26 October 1992 Electronic speckle pattern interferometry using multimode fiber optic bundles for sensing measurement

Wei Liu, Yushan Tan, Xianglin Wang

Proceedings Volume 1814, Optical Sensors; (1992) https://doi.org/10.1117/12.131278
Event: International Symposium on Optoelectronics in Computers, Communications, and Control, 1992, Hsinchu, Taiwan

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.

Citation Download Citation

Wei Liu, Yushan Tan, and Xianglin Wang "Electronic speckle pattern interferometry using multimode fiber optic bundles for sensing measurement", Proc. SPIE 1814, Optical Sensors, (26 October 1992); https://doi.org/10.1117/12.131278

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