EP 1465780 A1 20041013 - DIFFRACTIVE SECURITY ELEMENT HAVING AN INTEGRATED OPTICAL WAVEGUIDE
Title (en)
DIFFRACTIVE SECURITY ELEMENT HAVING AN INTEGRATED OPTICAL WAVEGUIDE
Title (de)
DIFFRAKTIVES SICHERHEITSELEMENT MIT INTEGRIERTEM OPTISCHEN WELLENLEITER
Title (fr)
ELEMENT DE SECURITE A DIFFRACTION A GUIDE D'ONDE OPTIQUE INTEGRE
Publication
Application
Priority
- CH 842002 A 20020118
- EP 0212243 W 20021102
Abstract (en)
[origin: US7102823B2] A diffractive security element ( 2 ) is divided into surface portions, having an optically effective structure ( 9 ) at interfaces embedded between two layers of a layer composite ( 1 ) of plastic material. At least the base layer ( 4 ), which is to be illuminated, of the layer composite ( 1 ) is transparent. The optically effective structure ( 9 ) as a base structure has a zero order diffraction grating with a period length of at most 500 nm. In at least one of the surface portions an integrated optical waveguide ( 5 ) with a layer thickness (s) of a transparent dielectric is embedded between the base layer ( 4 ) and an adhesive layer ( 7 ) of the layer composite ( 1 ) and/or a protective layer ( 6 ) of the layer composite ( 1 ), wherein the profile depth of the optically effective structure ( 9 ) is in a predetermined relationship with the layer thickness (s). Upon illumination with white incident light ( 13 ) the security element ( 2 ) produces light ( 14 ) which is diffracted in the zero diffraction order, of high intensity and with an intensive color.
IPC 1-7
IPC 8 full level
B42D 15/00 (2006.01); B42D 25/29 (2014.01); G02B 5/18 (2006.01)
CPC (source: EP KR US)
B42D 15/0033 (2013.01 - KR); B42D 15/0053 (2013.01 - KR); B42D 15/0073 (2013.01 - KR); B42D 25/29 (2014.10 - EP US); B42D 25/328 (2014.10 - KR); B42D 25/29 (2014.10 - KR)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03059643 A1 20030724; AT E396059 T1 20080615; AU 2002367080 A1 20030730; CN 100519222 C 20090729; CN 1615224 A 20050511; DE 50212303 D1 20080703; EP 1465780 A1 20041013; EP 1465780 B1 20080521; JP 2005514672 A 20050519; KR 20040083078 A 20040930; PL 202810 B1 20090731; PL 370298 A1 20050516; RU 2004125166 A 20050510; RU 2309048 C2 20071027; TW 200302358 A 20030801; TW I265319 B 20061101; US 2005128590 A1 20050616; US 7102823 B2 20060905
DOCDB simple family (application)
EP 0212243 W 20021102; AT 02806315 T 20021102; AU 2002367080 A 20021102; CN 02827097 A 20021102; DE 50212303 T 20021102; EP 02806315 A 20021102; JP 2003559783 A 20021102; KR 20047010869 A 20021102; PL 37029802 A 20021102; RU 2004125166 A 20021102; TW 91132970 A 20021108; US 50158604 A 20040910