title: Three-core fiber-based shape-sensing application.
abstract: By using specially designed three-core fiber, a microstructured light-pattern generator for sensing 3-D shapes has been demonstrated. The square or hexagon grid-interferometric fringe pattern formed by the fiber-optic interferometric grid generator is projected onto 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 2-D Fourier transforming profilometry. The use of the 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; moreover, the three-core fiber can be used in very narrow places, owing to its small size. Finally, the square or hexagon grid-interferometric fringe pattern provides a data-fusion ability that could further improve the accuracy of the 3-D shape-sensing results.
authors.affiliation: Photonics Research Center, College of Science, Harbin Engineering University, Harbin 150001, China. lbyuan@vip.sina.com
authors.forename: Libo
authors.initials: L
authors.lastname: Yuan
authors.forename: Jun
authors.initials: J
authors.lastname: Yang
authors.forename: Chunying
authors.initials: C
authors.lastname: Guan
authors.forename: Qiang
authors.initials: Q
authors.lastname: Dai
authors.forename: Fengjun
authors.initials: F
authors.lastname: Tian
mesh_terms: D000465:Algorithms; D003201:Computers; D003627:Data Interpretation, Statistical; D003952:Diagnostic Imaging / Q000379:methods*; D004867:Equipment Design; D005336:Fiber Optic Technology; D005583:Fourier Analysis; D007368:Interferometry; D008422:Materials Testing; D015233:Models, Statistical; D055100:Optical Fibers; D055095:Optics and Photonics; D015203:Reproducibility of Results; D012984:Software