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Computer Optics, 2015, Volume 39, Issue 1, Pages 26–35 (Mi co52)  

OPTO-IT

Post-processing of a focused-image hologram in the digital holographic interferometry

S. A. Savoninab, P. V. Ryabukhoab, V. P. Ryabukhoab

a Saratov State University
b Institute of Precision Mechanics and Control of the RAS

Abstract: Methods of contrast increasing of the interference patterns in digital holographic interferometry by numerical linear phase modulation and interpolation post-processing of digital focused-image holograms are discussed. It is shown that the linear phase modulation of the hologram leads to a shift of the object field spatial spectrum, whereas the step-in-interpolation procedure of the holograms leads to a broader spatial spectrum of the hologram. In both cases it becomes possible to separate an extended frequency range of the restored object field and, thus, significantly reduce the speckle size in the reconstructed object image, also increasing the fringe contrast in the holographic interferograms. The effectiveness of the methods is shown for holographic interferograms of the elastic deformation of a metallic membrane that is rigidly fixed on the contour.

Keywords: digital holography, interferometry, focused-image hologram, numerical post-processing, interpolation methods, contrast of interference fringes, microdeformation.

Funding Agency Grant Number
Ministry of Education and Science of the Russian Federation 703.2014.2
This work was partially supported by a grant 703.2014.2 program "Leading Scientific Schools of the Russian Federation."


DOI: https://doi.org/10.18287/0134-2452-2015-39-1-26-35

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Full text: http://www.computeroptics.smr.ru/.../390103.html
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Received: 07.11.2014

Citation: S. A. Savonin, P. V. Ryabukho, V. P. Ryabukho, “Post-processing of a focused-image hologram in the digital holographic interferometry”, Computer Optics, 39:1 (2015), 26–35

Citation in format AMSBIB
\Bibitem{SavRyaRya15}
\by S.~A.~Savonin, P.~V.~Ryabukho, V.~P.~Ryabukho
\paper Post-processing of a focused-image hologram in the digital holographic interferometry
\jour Computer Optics
\yr 2015
\vol 39
\issue 1
\pages 26--35
\mathnet{http://mi.mathnet.ru/co52}
\crossref{https://doi.org/10.18287/0134-2452-2015-39-1-26-35}


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