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Proceedings Paper

Three-dimensional shape measurement of small object based on tri-frequency heterodyne method
Author(s): Shouqi Liu; Wei Feng; Qican Zhang; Yuankun Liu
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Paper Abstract

Among temporal phase unwrapping methods based on structured light projection, tri-frequency heterodyne method, with the merits of less projected fringe, high precision and high reliability, has become a practical method in objects three-dimensional (3D) shape measurement. In this paper, a 3D shape measuring system was developed with a digital micromirror device (DMD) and synchronously trigged CCD camera. The 3D shape of a measured object was reconstructed from the deformed fringe patterns based on tri-frequency heterodyne method. The practical experiments were carried on some coins, and the results show that the system can restore their 3D shape on the tested partition with an accuracy of microns. This measurement system is prominent in 3D shape measurement of small or tiny objects, sample testing, and many other application fields.

Paper Details

Date Published: 7 August 2015
PDF: 5 pages
Proc. SPIE 9623, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 96231C (7 August 2015); doi: 10.1117/12.2193484
Show Author Affiliations
Shouqi Liu, Sichuan Univ. (China)
Wei Feng, Sichuan Univ. (China)
Qican Zhang, Sichuan Univ. (China)
Yuankun Liu, Sichuan Univ. (China)


Published in SPIE Proceedings Vol. 9623:
2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Jigui Zhu; Hwa-Yaw Tam; Kexin Xu; Hai Xiao; Sen Han, Editor(s)

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