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Proceedings Paper

3D shape measurement method based on the triangle pattern
Author(s): Guoli Qu; Chao Huang; Yanjun Fu; Bin Qian; Fuwei Wang
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Paper Abstract

Binary pattern defocused projection is a promising method of measuring 3D shapes. However, deep or long-distance defocus prevents high-accuracy 3D measurement. The triangle pattern is preferred because of its slight defocus and ability to overcome the nonlinear gamma. Thus, a novel method combining triangle pattern slight defocus with phase shifting is proposed. The proposed method has two merits: (1) Compared with the sinusoidal pattern, the proposed method can overcome the nonlinear gamma. (2) Compared with the binary pattern, it has the advantage of slightly defocusing to an ideal sinusoidal pattern in a short distance. Thus, the measurement error caused by nonlinear gamma and deep defocus is reduced. The RMS error of the proposed method is <0.03 mm. Theory analysis and experiments demonstrate the feasibility and superiority of the proposed method.

Paper Details

Date Published: 8 March 2017
PDF: 9 pages
Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 102550Q (8 March 2017); doi: 10.1117/12.2267787
Show Author Affiliations
Guoli Qu, Nanchang Hangkong Univ. (China)
Chao Huang, Nanchang Hangkong Univ. (China)
Yanjun Fu, Nanchang Hangkong Univ. (China)
Bin Qian, Nanchang Hangkong Univ. (China)
Fuwei Wang, Nanchang Hangkong Univ. (China)


Published in SPIE Proceedings Vol. 10255:
Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016
Yueguang Lv; Jialing Le; Hesheng Chen; Jianyu Wang; Jianda Shao, Editor(s)

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