Abstract

The grating fringe on the reference plane is broadened in the intersecting axis system because of oblique-angle projection. In order to solve this problem, we study the theoretical model of the temporal phase unwrapping method based on the fringe cycle correction. We also study the 3D shape measurement theoretical model of the larger complex objects after considering the coordinate deviation and lens distortion. Experimental results demonstrate that the fringe cycle on the reference plane can be corrected to a constant value, the lens distortion can be corrected, and 3D shape of larger complex objects can be accurately measured.

© 2014 Chinese Optics Letters

Single-shot 3D shape measurement of discontinuous objects based on a coaxial fringe projection system

Zhangying Wang, Zonghua Zhang, Nan Gao, Yanjun Xiao, Feng Gao, and Xiangqian Jiang
Appl. Opt. 58(5) A169-A178 (2019)

Multi-frequency color-marked fringe projection profilometry for fast 3D shape measurement of complex objects

Chao Jiang, Shuhai Jia, Jun Dong, Qingchen Bao, Jia Yang, Qin Lian, and Dichen Li
Opt. Express 23(19) 24152-24162 (2015)

Uneven fringe projection for efficient calibration in high-resolution 3D shape metrology

Zonghua Zhang, Catherine E. Towers, and David P. Towers
Appl. Opt. 46(24) 6113-6119 (2007)

High-frequency background modulation fringe patterns based on a fringe-wavelength geometry-constraint model for 3D surface-shape measurement

Xinran Liu and Jonathan Kofman
Opt. Express 25(14) 16618-16628 (2017)

3D shape measurement of diffused/specular surface by combining fringe projection and direct phase measuring deflectometry

Xiaohong Liu, Zonghua Zhang, Nan Gao, and Zhaozong Meng
Opt. Express 28(19) 27561-27574 (2020)