Phase-shifting shadow moiré based on iterative self-tuning algorithm.
Phase-shifting shadow moiré based on iterative self-tuning algorithm.
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DOI：
10.1364/ao.50.006708
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发表时间：
2011-12
期刊：
影响因子：
1.9
通讯作者：
Hubing Du;Hong Zhao;Bing Li;Jinlei Zhao;Shixun Cao
中科院分区：
文献类型：
--
作者：
Hubing Du;Hong Zhao;Bing Li;Jinlei Zhao;Shixun Cao
提出了一种基于迭代自校正算法的相移阴影莫尔条纹的通用算法。在我们提出的系统中，光栅平移相等的距离，以引入相移整个视场。该算法利用5幅干涉图产生精确的相位信息，并在高度解调过程中对精确的相位步长进行标定。与传统方法相比，该算法对由条纹图重建表面时相移阴影莫尔的主要系统误差源--高度相关效应不敏感。数值模拟和光学实验表明，该方法能够消除非均匀相移误差，具有比现有典型相移算法更上级的性能。
We proposed a general algorithm for phase-shifting shadow moiré by an iterative self-tuning algorithm. In our proposed system, the grating is translated in equal distance to introduce phase shifts across the field of view. The proposed algorithm produces accurate phase information with five interferograms and can calibrate the precise phase step during the process of the height demodulation. Compared with the traditional method, the proposed algorithm is insensitive to the height dependent effects, which is the main systematic source of error in phase-shift shadow moiré when reconstructing surfaces from fringe patterns. Numerical simulations and optical experiments show that the proposed method can eliminate the nonuniform phase-shift error and possesses a superior performance to existing typical phase-shifting algorithms.