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Proceedings Paper

3D shape measurement of optical free-form surface based on fringe projection
Author(s): Shaohui Li; Shugui Liu; Hongwei Zhang
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Paper Abstract

Present a novel method of 3D shape measurement of optical free-from surface based on fringe projection. A virtual reference surface is proposed which can be used to improve the detection efficiency and realize the automation of measuring process. Sinusoidal fringe patterns are projected to the high reflected surface of the measured object. The deflection fringe patterns that modulated by the object surface are captured by the CCD camera. The slope information can be obtained by analyzing the relationship between the phase deflectometry and the slope of the object surface. The wave-front reconstruction method is used to reconstruct the surface. With the application of fringe projection technology the accuracy of optical free-form surfaces measurement could reach the level of tens of micrometer or even micrometer.

Paper Details

Date Published: 27 May 2011
PDF: 10 pages
Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 80822Z (27 May 2011); doi: 10.1117/12.889361
Show Author Affiliations
Shaohui Li, Tianjin Univ. (China)
Shugui Liu, Tianjin Univ. (China)
Hongwei Zhang, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 8082:
Optical Measurement Systems for Industrial Inspection VII
Peter H. Lehmann; Wolfgang Osten; Kay Gastinger, Editor(s)

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