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Proceedings Paper

High-speed 3D surface measurement with mechanical projector
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Paper Abstract

This paper presents a method to overcome the light spectral range limitation of using digital-light-processing (DLP) projector for 3D shape measurement by developing a mechanical projector. The mechanical projector enables much broader spectral range of light than that the DLP projector allows. The rapidly spinning disk with binary structures can generate desired sinusoidal patterns at a frequency of 10 kHz or higher with a single DC motor. By precisely synchronizing the camera with the projector, phase-shifted fringe patterns can be accurately captured for high-accuracy 3D shape measurement. We further employed a computational framework that could enable absolute phase and thus absolute 3D shape measurement. We developed such prototype system that experimentally demonstrated the success of the proposed method.

Paper Details

Date Published: 4 May 2017
PDF: 8 pages
Proc. SPIE 10220, Dimensional Optical Metrology and Inspection for Practical Applications VI, 1022004 (4 May 2017); doi: 10.1117/12.2262572
Show Author Affiliations
Jae-Sang Hyun, Purdue Univ. (United States)
Song Zhang, Purdue Univ. (United States)


Published in SPIE Proceedings Vol. 10220:
Dimensional Optical Metrology and Inspection for Practical Applications VI
Kevin G. Harding; Song Zhang, Editor(s)

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