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Proceedings Paper

Three-dimensional profile measurement of steep object by optical fiber frequency mixing fringe projection technology
Author(s): Xiaoyan Lin; Libo Yuan
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Paper Abstract

Based on the theory of Fourier transformation profilometry(FTP), a novel profile measurement of steep object using fiber frequency mixing projection is proposed. With this method, optical fiber frequency mixing interference fringes are acquired through three optical fibers interference. It is made of three sets fringes with different spatial frequency. The spatial frequency of the interference stripes is changed through changing the spacing of the optical fiber end. The new three- optical- fiber frequency mixing profilometry only needs one frame of image to demodulate phase. Two deforming fringes with different frequency are captured at the same time. The surface range of the object is detected by the low frequency fringes. The precision depends on high frequency fringes. Finally, the exact profile of steep object is detected by data fusion. In the paper, a multi-functional projector is designed. Theory and experiment research are done to verify this novel method. Experimental results show that the method features accurate phase unwrapping with extensive measurement range.

Paper Details

Date Published: 17 January 2008
PDF: 5 pages
Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 672348 (17 January 2008); doi: 10.1117/12.783624
Show Author Affiliations
Xiaoyan Lin, Harbin Engineering Univ. (China)
Libo Yuan, Harbin Engineering Univ. (China)


Published in SPIE Proceedings Vol. 6723:
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Junhua Pan; James C. Wyant; Hexin Wang, Editor(s)

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