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Proceedings Paper

Three-core fiber far field structured light pattern generator and its shape sensing application
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Paper Abstract

By using spherical designed three-core fiber, a micro structured light pattern generator for sensing of 3-D object shapes has been demonstrated. The square or hexagon grid interferometric fringe pattern formed by the fiber optic interferometric grid generator is projected on an object's surface. The deformed grid pattern containing information of the object's surface topography is captured by a CCD camera and is analyzed using a 2-D Fourier transforming profilometry. The use of fiber optic grid interferogram technique greatly simplifies the holographic interferometry system and the carrier grid interferogram can be conveniently generated without the use of excessive auxiliary components or sophisticated experimental devices, and moreover, the three-core fiber can be used in very narrow places due to its small size. Finally, the square or hexagon grid interferometric fringe pattern provides a data fusion ability, which could further improve the accuracy of the 3-D shape sensing results.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70040S (16 May 2008); doi: 10.1117/12.785215
Show Author Affiliations
Libo Yuan, Harbin Engineering Univ. (China)
Jun Yang, Harbin Engineering Univ. (China)
Zhihai Liu, Harbin Engineering Univ. (China)
Chunying Guan, Harbin Engineering Univ. (China)
Qiang Dai, Harbin Engineering Univ. (China)
Fengjun Tian, Harbin Engineering Univ. (China)

Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors

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