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

Libo Yuan; Jun Yang; Zhihai Liu; Chunying Guan; Qiang Dai; Fengjun Tian

doi:10.1117/12.785215

16 May 2008 Three-core fiber far field structured light pattern generator and its shape sensing application

Libo Yuan, Jun Yang, Zhihai Liu, Chunying Guan, Qiang Dai, Fengjun Tian

Author Affiliations +

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70040S (2008) https://doi.org/10.1117/12.785215
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

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.

Citation Download Citation

Libo Yuan, Jun Yang, Zhihai Liu, Chunying Guan, Qiang Dai, and Fengjun Tian "Three-core fiber far field structured light pattern generator and its shape sensing application", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70040S (16 May 2008); https://doi.org/10.1117/12.785215

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