3D shape measurement of optical free-form surface based on fringe projection

Shaohui Li; Shugui Liu; Hongwei Zhang

doi:10.1117/12.889361

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27 May 2011 3D shape measurement of optical free-form surface based on fringe projection

Shaohui Li, Shugui Liu, Hongwei Zhang

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Proceedings Volume 8082, Optical Measurement Systems for Industrial Inspection VII; 80822Z (2011) https://doi.org/10.1117/12.889361
Event: SPIE Optical Metrology, 2011, Munich, Germany

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.

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Shaohui Li, Shugui Liu, and Hongwei Zhang "3D shape measurement of optical free-form surface based on fringe projection", Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 80822Z (27 May 2011); https://doi.org/10.1117/12.889361

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