Zobrazeno 1 - 10 of 35 pro vyhledávání: '"Ivo AUBRECHT"'
3
Security hologram foil labels with a design facilitating authenticity testing: effects of mechanical bending of substrates with the glued on holograms
Autor: Ivo Aubrecht
Publikováno v: SPIE Proceedings.
Optimal design of security holograms or diffractive optically variable image devices (DOVIDs) that would be complex enough to deter counterfeiters from attempts of mimicking but contains features readily recognizable by laymen has been addressed by m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::069187f94ad14e90b817e00710966e84
https://doi.org/10.1117/12.2179763
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4
Compensation of beam ellipticity and astigmatism based on holographic diffractive elements recorded onto spherical substrates
Autor: Vaclav Malina, Ivo Aubrecht, Jan Pala, Miroslav Miler
Publikováno v: Journal of Modern Optics. 51:2257-2266
Edge emitting diode lasers with their divergent, highly elliptical and astigmatic beams in the visible spectrum are widely used in all branches of photonics. Usually the beams must be transformed into circular anastigmatic beams for the majority of a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::94659eef0e09ed181008c040da7af769
https://doi.org/10.1080/09500340408232528
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5
Application of holographic diffractive doublets as collimators for highly elliptical light beams edge emitted from diode lasers
Autor: Ivo Aubrecht, Jan Pala, Miroslav Miler
Publikováno v: Journal of Modern Optics. 49:1919-1931
Two schemes for collimation of diode laser light beams with high cross-sectional ellipticity by means of a doublet of holographic diffractive elements are proposed and designed; one of the schemes is realized and tested. In both the schemes the first
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2aacef3ebc60101cd2028c15696891db
https://doi.org/10.1080/09500340210140588
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6
Light scattering from a waveguide structure with a sinusoidally corrugated boundary modulated by a weak roughness
Autor: Miroslav Miler, Ivo Aubrecht, I. Mokhun
Publikováno v: Scopus-Elsevier
Results are reported of the analysis of light scattering from a waveguide structure with a periodically and randomly distorted boundary. The method is based on the assumption of single scattering. The field inside the waveguide is analyzed within the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e9ea7aa51d6feba2ade601da8e907e8
https://doi.org/10.1134/1.626750
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7
Recording of holographic diffraction gratings in photopolymers: Theoretical modelling and real-time monitoring of grating growth
Autor: Ivo Aubrecht, Miroslav Miler, Ivo Koudela
Publikováno v: Journal of Modern Optics. 45:1465-1477
Recording of holographic volume diffraction gratings in Du Pont's photopolymer HRS-150 is studied theoretically and experimentally. Particular attention is paid to the dynamics of the recording process. The temporal evolution of holographic gratings
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b0708585ad49d28f52352ee882c4db41
https://doi.org/10.1080/09500349808230641
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9
Security holograms employing perspectival anamorphosis and stereoscopy
Autor: Ivo Aubrecht
Publikováno v: SPIE Proceedings.
A holographic diffraction structure that features stereoscopic pair of records with distorted perspective in the plane of the structure is designed and realized. On normal illumination and oblique binocular observation, the structure provides illusio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ec3d6687abbf307ded67d52faf4451f
https://doi.org/10.1117/12.2017386
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10
Synergy of moiré principles and diffraction by periodic structures in optical devices for document security
Autor: Ivo Aubrecht
Publikováno v: Holography: Advances and Modern Trends II.
Recording of periodic structures is employed, instead of printing techniques, for moire pattern to be generated. Diffraction gratings are utilized not only as substitutes of printing inks here but also to employ variation of visual appearance for rev
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e46eeecce251aa66a2a5a32c6125b208
https://doi.org/10.1117/12.886257
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