A prototype system for high precision 3D measurement based on grating method

Zhongwei Li; Congjun Wang

doi:10.1117/12.762005

28 November 2007 A prototype system for high precision 3D measurement based on grating method

Zhongwei Li, Congjun Wang

Proceedings Volume 6834, Optical Design and Testing III; 683442 (2007) https://doi.org/10.1117/12.762005
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

In this paper a 3D shape measurement system based on the grating method was developed. The system consists of two CCD cameras and a DLP projector. The multi-frequency heterodyne principle was presented to overcome the unwrapping problem of phase functions, and a phase-to-coordinates conversion algorithm was proposed to reconstruct the 3D geometry from the unwrapped phase map. To demonstrate the performance of this 3D measurement system, a face model was measured, and the reconstructed 3D geometric surface is very smooth with details. Additionally, a ladder with one step was measured. The result shows the system can measure the discontinuous object and get high measurement precision.

Citation Download Citation

Zhongwei Li and Congjun Wang "A prototype system for high precision 3D measurement based on grating method", Proc. SPIE 6834, Optical Design and Testing III, 683442 (28 November 2007); https://doi.org/10.1117/12.762005

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