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Proceedings Paper

Surface measurement using improved crossed-optical-axes geometry
Author(s): Yuchi Lin; Xiaobing Niu; Dongmei Cheng; Meirong Zhao; Zhanyuan Sun; Yuxiang Zhang
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Paper Abstract

Crossed-optical-axes project grating system is fundamental architecture in 3-D profilometry measurement. Confined by three conditional constraints, it has some limitations in practical application. An improved system relieving the constraints was proposed here. Geometrical deduction based on image ray tracing, optical triagulation and pinhole model was carried out. By projecting another central line fringe as the zero-phase datum, wrapped phase map about reference or measured object could be unwrapped without inducing systematic errors. The simulation was to measure a plate with a height of 80mm when changing geometrical parameters. Compared with the conventional configuration, new system approves more flexibility and maneuverability.

Paper Details

Date Published: 5 September 2002
PDF: 4 pages
Proc. SPIE 4921, Optical Manufacturing Technologies, (5 September 2002); doi: 10.1117/12.481748
Show Author Affiliations
Yuchi Lin, Tianjin Univ. (China)
Xiaobing Niu, Tianjin Univ. (China)
Dongmei Cheng, Tianjin Univ. (China)
Meirong Zhao, Tianjin Univ. (China)
Zhanyuan Sun, Tianjin Univ. (Taiwan)
Yuxiang Zhang, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 4921:
Optical Manufacturing Technologies
Yimo Zhang; Wenyao Liu; Harvey M. Pollicove, Editor(s)

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