Novel temporal Fourier transform speckle pattern shearing interferometer

被引:44
|
作者
Joenathan, C
Franze, B
Haible, P
Tiziani, HJ
机构
[1] Univ Stuttgart, Inst Tech Opt, D-70569 Stuttgart, Germany
[2] Rose Hulman Inst Technol, Dept Phys & Appl Opt, Terre Haute, IN 47803 USA
关键词
interferometry; speckle phenomena; nondestructive testing; speckle shearing;
D O I
10.1117/1.601834
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A method to measure the derivative of displacement using time variation changes in the object together with Fourier transform analysis in speckle shear interferometry is presented. The concept of the method is that the object is deformed continuously and a large number of sheared images of the object motion are acquired using a high speed CCD camera. The derivative of the object deformation is then retrieved from this large set of data using Fourier transformation. The method is capable of obtaining information for object displacements over 500 mu m, which is a very difficult task when using conventional electronic speckle pattern shearing interferometry. Theory as well as some of the experimental results with the new method are delineated. (C) 1998 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(98)02406-4].
引用
收藏
页码:1790 / 1795
页数:6
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