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A sampler of diffraction and refraction optically variable image elements

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F21%3A00564672" target="_blank" >RIV/68081731:_____/21:00564672 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/00007064:K01__/21:N0000122

  • Výsledek na webu

    <a href="https://www.confer.cz/nanocon/2021/4371-a-sampler-of-diffraction-and-refraction-optically-variable-image-elements" target="_blank" >https://www.confer.cz/nanocon/2021/4371-a-sampler-of-diffraction-and-refraction-optically-variable-image-elements</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.37904/nanocon.2021.4371" target="_blank" >10.37904/nanocon.2021.4371</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    A sampler of diffraction and refraction optically variable image elements

  • Popis výsledku v původním jazyce

    Diffraction and refraction optically variable image elements are basic building blocks of planar structures for advanced security of documents and valuables. A sampler formed by an array of 36 diffraction structures binary, tertiary, quaternary and blazed gratings (period range 400 nm 20,000 nm) represents a cross-section throughout technological steps mastering, galvanic replication and embossing. Electron-beam writing technology with Gaussian beam and electron energy of 100 keV, with very small forward scattering of high energy electrons and with the possibilities to create a linear grating with the minimal period of 100 nm, was used to create the master. An important advantage of high-resolution electron-beam lithography is its substantial flexibility in combining possible planar structures with significantly different parameters, such as very dense and relatively shallow structures together with deep structures (approx. 10 microns) with precise shapes (micro-lenses or Fresnel structures). For protection of documents and valuables, interesting results are induced with planar optical structures consisting of non-periodic arrangements, which are characterized by high robustness to counterfeiting and imitation. While the origination process is available for grating period down to 100 nm, the mass replication technology appears to be a bottleneck of the entire technological process. Measurement of topology and profiles of the structures by atomic forces microscope and documenting the quality of technological process of the three steps of replication of planar optically variable elements was performed for all 36 structure types of sampler.

  • Název v anglickém jazyce

    A sampler of diffraction and refraction optically variable image elements

  • Popis výsledku anglicky

    Diffraction and refraction optically variable image elements are basic building blocks of planar structures for advanced security of documents and valuables. A sampler formed by an array of 36 diffraction structures binary, tertiary, quaternary and blazed gratings (period range 400 nm 20,000 nm) represents a cross-section throughout technological steps mastering, galvanic replication and embossing. Electron-beam writing technology with Gaussian beam and electron energy of 100 keV, with very small forward scattering of high energy electrons and with the possibilities to create a linear grating with the minimal period of 100 nm, was used to create the master. An important advantage of high-resolution electron-beam lithography is its substantial flexibility in combining possible planar structures with significantly different parameters, such as very dense and relatively shallow structures together with deep structures (approx. 10 microns) with precise shapes (micro-lenses or Fresnel structures). For protection of documents and valuables, interesting results are induced with planar optical structures consisting of non-periodic arrangements, which are characterized by high robustness to counterfeiting and imitation. While the origination process is available for grating period down to 100 nm, the mass replication technology appears to be a bottleneck of the entire technological process. Measurement of topology and profiles of the structures by atomic forces microscope and documenting the quality of technological process of the three steps of replication of planar optically variable elements was performed for all 36 structure types of sampler.

Klasifikace

  • Druh

    D - Stať ve sborníku

  • CEP obor

  • OECD FORD obor

    21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/VI20192022147" target="_blank" >VI20192022147: Difraktivní a refraktivní optika pro pokročilé zabezpečení dokumentů a cenin</a><br>

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2021

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název statě ve sborníku

    NANOCON 2021 - Conference proceedings

  • ISBN

    978-80-88365-00-6

  • ISSN

    2694-930X

  • e-ISSN

  • Počet stran výsledku

    6

  • Strana od-do

    436-441

  • Název nakladatele

    Tanger Ltd.

  • Místo vydání

    Ostrava

  • Místo konání akce

    Brno

  • Datum konání akce

    20. 10. 2021

  • Typ akce podle státní příslušnosti

    WRD - Celosvětová akce

  • Kód UT WoS článku