Real-time fringe pattern processing and its applications
Real-time fringe pattern processing and its applications
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实时条纹图案处理及其应用
DOI：
10.1117/12.211852
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
M. Isshiki
中科院分区：
文献类型：
--
作者：
S. Nakadate;M. Isshiki
提出了两种实时相位映射的方法，即基于三条纹图空间相移的方法和基于倾斜条纹图空间同步检测的方法。实现了一个基于这两种条纹处理技术的数字电视图像处理器。本方法的应用程序的表面形状测量使用偏振干涉仪和条纹投影技术，并使用全息干涉仪的表面变形测量。从理论上分析了由输入条纹信号的加性强度噪声和测量系统失调引起的乘性强度噪声引起的最坏相位误差。还对计算数字化引起的相位误差进行了数值评估。
Two real-time phase mapping methods for finge patterns are presented, which are based on a spatial phase-shifting with three fringe patterns, and on a spatial synchronous detection for a tilted fringe pattern. A digital TV-image processor is implemented which bases on the two fringe processing techniques. Applications of the present methods to surface shape measurements using a polarization interferometer and a fringe projection technique, and to a surface deformation measurement using a holographic interferometer are described. Worst phase errors are analyzed theoretically which are caused by an additive intensity noise of input fringe signals and a multiplicative intensity noise due to misalignments of a measuring system. A phase error due to a digitization of calculations is also evaluated numerically.