Simultaneous measurement of three orthogonal components of displacement by electronic speckle-pattern interferometry and the Fourier transform method.
Simultaneous measurement of three orthogonal components of displacement by electronic speckle-pattern interferometry and the Fourier transform method.
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通过电子散斑干涉仪和傅里叶变换方法同时测量位移的三个正交分量。
DOI：
10.1364/ao.36.001438
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发表时间：
1997
期刊：
影响因子：
1.9
通讯作者：
J. Tyrer
中科院分区：
文献类型：
--
作者：
T. Takatsuji;B. Oreb;D. Farrant;J. Tyrer
提出了用三束物光和一束参考光的电子散斑干涉法测量物体三维位移的方法。在单个干涉图中记录对应于不同灵敏度矢量的多个干涉条纹，并通过傅里叶变换方法分离以给出位移的三个分量。对电视摄像机散斑尺寸与像元尺寸之比与测量误差的关系进行了实验研究，并与前人的研究结果进行了比较。当散斑尺寸近似等于像素尺寸时，出现导致最小测量误差的最佳条件。在满足该条件时，测量误差在1.5%~ 6.0%之间。
The measurement of three-dimensional displacement by electronic speckle-pattern interferometry with three object beams and one reference beam is presented. Multiple interference fringes corresponding to different sensitivity vectors are recorded in a single interferogram and separated by means of the Fourier transform method to give three components of displacement. The relationship between the ratio of the speckle size to the pixel size of a TV camera and the measurement error is investigated experimentally and compared with the research of others. The optimum condition leading to a minimum measurement error occurs when the speckle size is approximately equal to the pixel size. With this condition satisfied, the measurement error varies from 1.5% to 6.0%.