1. Using Two-Beam Interferometry in Surface Deformation Monitoring Systems.
- Author
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Makhov, V. E., Potapov, A. I., Smorodinskii, Ya. G., and Manevich, E. Ya.
- Subjects
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HOLOGRAPHIC interferometry , *SPECKLE interferometry , *DEFORMATION of surfaces , *INTERFEROMETRY , *DIFFRACTION patterns , *WAVEFRONTS (Optics) - Abstract
We consider the issues of expanding the range of measuring the shape and determining the deformation of a surface by wavefront detection methods such as holographic and speckle interferometry and speckle photography, based on a two-beam Jamin interferometer equipped with an image shifting device. A design has been developed for the two-beam interferometer with the device for shifting images in channels based on synchronously tilted plane-parallel plates. A technique for processing shear interferograms is decsribed. The accuracy of measuring the spacing of fringes in the interference pattern by Fourier-transform and wavelet-analysis based algorithms is studied. A block diagram of an automated device for interpreting speckle interferograms by the phase method based on a He–Ne laser in a magnetic field with a Zeeman frequency shift has been developed. It is shown that the accuracy of measuring the spacing of interference fringes can be as high as 0.02 of the interference fringe width. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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