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Shape measurement by use of temporal Fourier transformation in dual-beam illumination speckle interferometry

机译:在双光束照明散斑干涉术中使用时间傅里叶变换进行形状测量

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摘要

We outline a novel method for determining the shape of an object by use of temporal Fourier-transform analysis in dual-beam illumination speckle interferometry. The object whose shape is to be determined is rotated about an axis, and a number of frames of the image of the object motion are acquired. Temporal in-plane displacement that is due to the object rotation is related to the shape of the object and is retrieved from this large set of data by Fourier transformation. With this method one can determine the absolute height of the object with variable resolution, thereby allowing shapes of objects with large and small slopes to be determined. The theory of the method along with experimental results is presented. (C) 1998 Optical Society of America. [References: 10]
机译:我们概述了一种通过在双光束照明散斑干涉术中使用时间傅立叶变换分析来确定物体形状的新颖方法。将要确定其形状的对象绕轴旋转,并获取对象运动图像的帧数。由物体旋转引起的时间平面内位移与物体的形状有关,并通过傅立叶变换从大量数据中检索出来。利用这种方法,可以以可变的分辨率确定物体的绝对高度,从而可以确定具有大和小斜率的物体的形状。介绍了该方法的理论以及实验结果。 (C)1998年美国眼镜学会。 [参考:10]

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