This HTML5 document contains 57 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

PrefixIRI
n5http://linked.opendata.cz/ontology/domain/vavai/riv/typAkce/
dctermshttp://purl.org/dc/terms/
n18http://localhost/temp/predkladatel/
n17http://purl.org/net/nknouf/ns/bibtex#
n14http://linked.opendata.cz/resource/domain/vavai/projekt/
n12http://linked.opendata.cz/resource/domain/vavai/riv/tvurce/
n21http://linked.opendata.cz/resource/domain/vavai/subjekt/
n4http://linked.opendata.cz/ontology/domain/vavai/
n8http://linked.opendata.cz/resource/domain/vavai/vysledek/RIV%2F68407700%3A21340%2F12%3A00203807%21RIV13-AV0-21340___/
n10https://schema.org/
shttp://schema.org/
skoshttp://www.w3.org/2004/02/skos/core#
rdfshttp://www.w3.org/2000/01/rdf-schema#
n3http://linked.opendata.cz/ontology/domain/vavai/riv/
n24http://bibframe.org/vocab/
n2http://linked.opendata.cz/resource/domain/vavai/vysledek/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n16http://linked.opendata.cz/ontology/domain/vavai/riv/klicoveSlovo/
n23http://linked.opendata.cz/ontology/domain/vavai/riv/duvernostUdaju/
xsdhhttp://www.w3.org/2001/XMLSchema#
n11http://linked.opendata.cz/ontology/domain/vavai/riv/jazykVysledku/
n7http://linked.opendata.cz/ontology/domain/vavai/riv/aktivita/
n22http://linked.opendata.cz/ontology/domain/vavai/riv/obor/
n15http://linked.opendata.cz/ontology/domain/vavai/riv/druhVysledku/
n20http://reference.data.gov.uk/id/gregorian-year/

Statements

Subject Item
n2:RIV%2F68407700%3A21340%2F12%3A00203807%21RIV13-AV0-21340___
rdf:type
n4:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1117/12.2006042
dcterms:description
Synthetic diffractive structures represent an important tool in the optical document security. Their macroscopic visual behavior is based on properties of a very fine micro-structure which cannot be copied using common copying techniques. The visual effects can be easily observed by a common observer without any special inspection tools. However, when a high level of security is needed, additional features are often included based on an optical encryption of information. In this paper, a novel encryption technique is presented, which is based on utilizing the plastic holographic foil as a waveguide and special diffractive structures as coupling elements. When an in-coupling area is illuminated with a defined light beam, the light is coupled into the waveguide and travels to an out-coupling part. The encrypted information is encoded either in the shape of the out-coupling area or it can be formed from an out-coupling hologram in free space above the element. Both laser and normal white light sources can be used for reading the information. The coupling areas can be mixed with diffractive micro-structures forming visual effects and can be invisible during a normal observation of the hologram. The couplers can be realized using the technology fully compatible with the standard process for mastering and replication of the security elements. Several extensions of the described idea of waveguide cryptograms are also included. Finally, a set of real samples of the security elements is presented, which were realized using an advanced matrix laser lithography technique. (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. Synthetic diffractive structures represent an important tool in the optical document security. Their macroscopic visual behavior is based on properties of a very fine micro-structure which cannot be copied using common copying techniques. The visual effects can be easily observed by a common observer without any special inspection tools. However, when a high level of security is needed, additional features are often included based on an optical encryption of information. In this paper, a novel encryption technique is presented, which is based on utilizing the plastic holographic foil as a waveguide and special diffractive structures as coupling elements. When an in-coupling area is illuminated with a defined light beam, the light is coupled into the waveguide and travels to an out-coupling part. The encrypted information is encoded either in the shape of the out-coupling area or it can be formed from an out-coupling hologram in free space above the element. Both laser and normal white light sources can be used for reading the information. The coupling areas can be mixed with diffractive micro-structures forming visual effects and can be invisible during a normal observation of the hologram. The couplers can be realized using the technology fully compatible with the standard process for mastering and replication of the security elements. Several extensions of the described idea of waveguide cryptograms are also included. Finally, a set of real samples of the security elements is presented, which were realized using an advanced matrix laser lithography technique. (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
dcterms:title
Advanced optical document security element Advanced optical document security element
skos:prefLabel
Advanced optical document security element Advanced optical document security element
skos:notation
RIV/68407700:21340/12:00203807!RIV13-AV0-21340___
n4:predkladatel
n21:orjk%3A21340
n3:aktivita
n7:P
n3:aktivity
P(KAN401220801)
n3:dodaniDat
n20:2013
n3:domaciTvurceVysledku
Škereň, Marek n12:4965841 n12:5793521 n12:1881825 n12:8789088
n3:druhVysledku
n15:D
n3:duvernostUdaju
n23:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
121193
n3:idVysledku
RIV/68407700:21340/12:00203807
n3:jazykVysledku
n11:eng
n3:klicovaSlova
Free space; Holograms; Holography; Information security; Inspection equipment; Lasers; Lithography; Matrices; Superluminescent sources; Waveguides
n3:klicoveSlovo
n16:Lasers n16:Waveguides n16:Information%20security n16:Inspection%20equipment n16:Superluminescent%20sources n16:Holograms n16:Free%20space n16:Holography n16:Lithography n16:Matrices
n3:kontrolniKodProRIV
[8287A2BEB619]
n3:mistoKonaniAkce
Ostravice
n3:mistoVydani
Washington
n3:nazevZdroje
SPIE Proceedings Volume 8697
n3:obor
n22:BH
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:projekt
n14:KAN401220801
n3:rokUplatneniVysledku
n20:2012
n3:tvurceVysledku
Květoň, Milan Škereň, Marek Fiala, Pavel Possolt, Martin Svoboda, Jakub
n3:typAkce
n5:EUR
n3:zahajeniAkce
2012-09-03+02:00
s:numberOfPages
8
n24:doi
10.1117/12.2006042
n17:hasPublisher
SPIE
n10:isbn
978-0-9541146-4-0
n18:organizacniJednotka
21340