Dr. Roman I. Egorov Profile

Dr. Roman I. Egorov

at Institute of Physics

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Publications (4)

Proceedings Article | 14 June 2006 Paper

Singular elliptic light fields: genesis of topology and morphology

M. Soskin, V. Denisenko, R. Egorov

Proceedings Volume 6254, 625404 (2006) https://doi.org/10.1117/12.679899

KEYWORDS: Polarization, Stars, Singular optics, Solids, Optical vortices, Glasses, Diamond, Optical testing, Spiral phase plates, Wavefronts

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Proceedings Article | 11 May 2006 Paper

Polarization pattern of singular vector light fields: topology, transformations under guided perturbations and morphology

M. Soskin, V. Denisenko, R. Egorov

Proceedings Volume 6255, 62550O (2006) https://doi.org/10.1117/12.676827

KEYWORDS: Polarization, Stars, Singular optics, Optical vortices, Glasses, Solids, Diamond, Polarimetry, Spiral phase plates, Wavefronts

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Proceedings Article | 17 August 2004 Paper

Singular Stokes-polarimetry as new technique for metrology and inspection of polarized speckle fields

Marat Soskin, Vladimir Denisenko, Roman Egorov

Proceedings Volume 5458, (2004) https://doi.org/10.1117/12.544681

KEYWORDS: Polarization, Speckle, Polarimetry, Inspection, Liquid crystals, CCD cameras, Polarizers, Metrology, Cameras, Multimode fibers

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Polarimetry is effective technique for polarized light fields characterization. It was shown recently that most full “finger-print” of light fields with arbitrary complexity is network of polarization singularities: C points with circular polarization and L lines with variable azimuth. The new singular Stokes-polarimetry was elaborated for such measurements. It allows define azimuth, eccentricity and handedness of elliptical vibrations in each pixel of receiving CCD camera in the range of mega-pixels. It is based on precise measurement of full set of Stokes parameters by the help of high quality analyzers and quarter-wave plates with λ/500 preciseness and 4’ adjustment. The matrices of obtained data are processed in PC by special programs to find positions of polarization singularities and other needed topological features. The developed SSP technique was proved successfully by measurements of topology of polarized speckle-fields produced by multimode “photonic-crystal” fibers, double side rubbed polymer films, biomedical samples. Each singularity is localized with preciseness up to ± 1 pixel in comparison with 500 pixels dimensions of typical speckle. It was confirmed that network of topological features appeared in polarized light field after its interaction with specimen under inspection is exact individual “passport” for its characterization. Therefore, SSP can be used for smart materials characterization. The presented data show that SSP technique is promising for local analysis of properties and defects of thin films, liquid crystal cells, optical elements, biological samples, etc. It is able discover heterogeneities and defects, which define essentially merits of specimens under inspection and can’t be checked by usual polarimetry methods. The detected extra high sensitivity of polarization singularities position and network to any changes of samples position and deformation opens quite new possibilities for sensing of deformations and displacement of checked elements in the sub-micron range.

Proceedings Article | 4 June 2004 Paper

Stokes polarimetry in singular optics

Vladimir Denisenko, Roman Egorov, Marat Soskin

Proceedings Volume 5477, (2004) https://doi.org/10.1117/12.558753

KEYWORDS: Polarization, Optical fibers, Polymer thin films, Polymers, Singular optics, Polarimetry, Scattering, CCD cameras, Polymer optical fibers, Diffusers

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