Fourier transform profilometry based on composite structured light pattern
Fourier transform profilometry based on composite structured light pattern
复制标题
基于复合结构光图案的傅里叶变换轮廓测量
DOI：
10.1016/j.optlastec.2006.08.014
复制
发表时间：
2007-09-01
影响因子：
5
通讯作者：
Liu, Yong-Zhi
中科院分区：
文献类型：
--
作者：
Yue, Hui-Min;Su, Xian-Yu;Liu, Yong-Zhi
在傅里叶变换轮廓术（FTP）中，成像条纹的零频率会影响测量范围和精度。通常采用π相移技术消除零级分量，但该方法需要捕获两幅相位差为E的条纹图，这将妨碍该方法的真实的应用。本文提出了一种新的方法，在该方法中，一个复合结构光图案投射到物体上。通过沿两个不同载波频率的正交方向调制具有沿着相位差的两个单独条纹图案来形成复合结构光图案。该方法只需使用一幅条纹图即可消除零频。实验结果表明，与传统的三相移技术相比，该方法的测量精度没有降低。(C)2006爱思唯尔有限公司保留所有权利。
In Fourier transform profilometry (FTP), the zero frequency of the imaged patterns will influence the measurement range and precision. The pi phase shifting technique is usually used to eliminate the zero order component, but this method requires the capture of two fringe patterns with a E phase difference between them, which will impede the real time application of the method. In this paper, a novel method is proposed, in which a composite structured light pattern is projected onto the object. The composite structured light pattern is formed by modulating two separate fringe patterns with a 7[ phase difference along the orthogonal direction of the two distinct carrier frequencies. This method can eliminate the zero frequency by using only one fringe pattern. Experiments show that there is no decrease in the precision of this novel method compared with the traditional tr phase shifting technique. (C) 2006 Elsevier Ltd. All rights reserved.