High-speed 3D surface measurement with mechanical projector

Jae-Sang Hyun; Song Zhang

doi:10.1117/12.2262572

4 May 2017 High-speed 3D surface measurement with mechanical projector

Jae-Sang Hyun, Song Zhang

Proceedings Volume 10220, Dimensional Optical Metrology and Inspection for Practical Applications VI; 1022004 (2017) https://doi.org/10.1117/12.2262572
Event: SPIE Commercial + Scientific Sensing and Imaging, 2017, Anaheim, CA, United States

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.

Citation Download Citation

Jae-Sang Hyun and Song Zhang "High-speed 3D surface measurement with mechanical projector", Proc. SPIE 10220, Dimensional Optical Metrology and Inspection for Practical Applications VI, 1022004 (4 May 2017); https://doi.org/10.1117/12.2262572

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