Optical security elements based on waveguide effects

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F15%3A00444540" target="_blank" >RIV/61389021:_____/15:00444540 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/15:00309265

Výsledek na webu

<a href="http://dx.doi.org/10.1117/12.2175918" target="_blank" >http://dx.doi.org/10.1117/12.2175918</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2175918" target="_blank" >10.1117/12.2175918</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Optical security elements based on waveguide effects

Popis výsledku v původním jazyce

Optical document security represents an important field of application of analogue and synthetic diffractive structures.Most of the security elements are based on visual effects formed by diffraction on a structure with the details in the order of hundreds of nanometers.However,to improve the anti-counterfeiting properties of these structures, various types of hidden features are included within the area of the security elements.They are not visible under normal lighting but it is possible to easily reveal the hidden information under specially-defined geometry and/or type of illumination.In this paper, theory and application of a novel type of hidden diffractive security element are presented.It combines standard visual properties of synthetic holograms with waveguide effects.The hidden information is recorded using a special grating,which is not visible under normal observation geometry.The encoded image can be reconstructed only when the proper guided mode appears in a substrate.

Název v anglickém jazyce

Optical security elements based on waveguide effects

Popis výsledku anglicky

Optical document security represents an important field of application of analogue and synthetic diffractive structures.Most of the security elements are based on visual effects formed by diffraction on a structure with the details in the order of hundreds of nanometers.However,to improve the anti-counterfeiting properties of these structures, various types of hidden features are included within the area of the security elements.They are not visible under normal lighting but it is possible to easily reveal the hidden information under specially-defined geometry and/or type of illumination.In this paper, theory and application of a novel type of hidden diffractive security element are presented.It combines standard visual properties of synthetic holograms with waveguide effects.The hidden information is recorded using a special grating,which is not visible under normal observation geometry.The encoded image can be reconstructed only when the proper guided mode appears in a substrate.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of SPIE Vol. 9442: Optics and Measurement Conference 2014

ISBN

978-1-62841-557-5

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

11

Strana od-do

944214-944214

Název nakladatele

SPIE-INT SOC OPTICAL ENGINEERING

Místo vydání

Bellingham

Místo konání akce

Liberec

Datum konání akce

7. 10. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000349403500039