A Two-step Phase-shifting Algorithm for Phase Calculation

被引：9
|
作者：
Zhang X.-X. [1 ]
Wang Y.-M. [1 ]
Huang S.-J. [1 ]
Gao N. [1 ]
Zhang Z.-H. [1 ]
机构：
[1] School of Mechanical Engineering, Hebei University of Technology, Tianjin
来源：
Zhang, Zong-Hua (zhzhang@hebut.edu.cn) | 1600年 / Chinese Optical Society卷 / 46期
基金：
中国国家自然科学基金;
关键词：
Fast measurement; Fourier transform; Mean envelope; Optical measurement; Phase measuring profilometry; Phase shifting algorithm; Phase unwrapping;
D O I：
10.3788/gzxb20174603.0311005
中图分类号：
学科分类号：
摘要：
A fast three-dimensional object measurement method was proposed by combining the Fourier profilometry with the phase shifting profilometry. By accurately extracting the mean envelope of the fringe in time domain and simply filtering in frequency domain, the fringe can be pre-processed. Combined with the two-step phase-shift algorithm base on 90° phase shift, an accurate phase value can be obtained from two fringe patterns. The results of simulation and experiment of comparing the proposed method with the existing methods show that this method can achieve a higher accuracy, which the RMS (Root Mean Square) is less than 3×10-3 rad. The proposed method has the following advantages of good robustness for its insensitive to noise and surface mutation, fast operation and high accuracy. Therefore, it will have a high application value in the field of fast measurement. © 2017, Science Press. All right reserved.
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