EP 1465780 B1 20080521 - 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: WO03059643A1] A diffractive security element (2) is subdivided into partial surfaces that have an optically active structure (9) at boundary surfaces while being embedded between two layers of a layer composite (1) made of plastic. At least the base layer (4) of the layer composite (1) that is to be illuminated is transparent. The optically active structure (9) comprises, as a basic structure, a diffraction grating of the zero order with a period length of no greater than 500 nm. Inside at least one of the partial surfaces, an integrated optical waveguide (5) having a layer thickness (s) and made 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), whereby the profile depth of the optically active structure (9) is a predetermined proportion of the layer thickness (s). When illuminated with white incident light (13) in the zero diffraction order, the security element (2) produces diffracted light (14) of a high intensity and intensive color.
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)
Citation (examination)
EP 0375833 A1 19900704 - LANDIS & GYR BETRIEBS AG [CH]
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