Development of a fast binocular structured light measuring system using composite fringe projection

Huixing Song; Lingbao Kong; Huijun An; Guangxi Dong

doi:10.1117/12.2617907

15 February 2022 Development of a fast binocular structured light measuring system using composite fringe projection

Huixing Song, Lingbao Kong, Huijun An, Guangxi Dong

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121666X (2022) https://doi.org/10.1117/12.2617907
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

With the development of three-dimensional (3D) shape measurement technology, fringe projection has become an effective and reliable measurement method for its great performance on the robustness against environmental disturbance and ease of operation. Traditional method of fringe projection measurement using one projector and one camera needs multiple fringe patterns to project to get absolute phases. However, it always demands fast measuring speed in the condition of online measurement. In this work, one more camera is introduced to establish a binocular structured light system to extend the field of view. In addition, to improve the measurement speed, a triangular wave is supplemented to the sinusoidal fringe to form a superposed fringe to assist phase unwrapping with only three images projected. In the phase unwrapping process, geometric constraints are used to find the corresponding points in the images captured by left and right cameras, and then the unique corresponding points are selected by the embedded triangular waves and the period order is determined. Several experiments are performed and the results shows that the proposed method takes only one third of the time compared with the conventional measurement and thus can realize a fast 3D measurement by structured light.

Citation Download Citation

Huixing Song, Lingbao Kong, Huijun An, and Guangxi Dong "Development of a fast binocular structured light measuring system using composite fringe projection", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121666X (15 February 2022); https://doi.org/10.1117/12.2617907

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KEYWORDS

Cameras

Projection systems

Calibration

Fringe analysis

3D metrology

Composites

Structured light

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