EP 1392520 A1 20040303 - DIFFRACTIVE SAFETY ELEMENT
Title (en)
DIFFRACTIVE SAFETY ELEMENT
Title (de)
DIFFRAKTIVES SICHERHEITSELEMENT
Title (fr)
ELEMENT DE SECURITE A DIFFRACTION
Publication
Application
Priority
- DE 10127981 A 20010608
- EP 0205984 W 20020531
Abstract (en)
[origin: WO02100653A1] The invention relates to a safety element (2), consisting of an identifiable reflective, optically variable surface design (3) made of a mosaic of optically active surface elements (13) which can be visually recognised from predetermined directions of observation and which is embedded in a layered composite made of plastic. At least two of the mosaic surfaces (11; 12) of the surface design (3) are arranged next to each other in the mosaic of the surface design (3) and comprise microscopically fine light diffractive relief structures (4). The spatial frequencies of the relief structures in the mosaic surfaces (11; 12) have values consisting of predetermined spatial frequency ranges whereby the relief structures of the mosaic surfaces (11, 12) diffract visible monochromatic light parallel to the normal (32) when beams of light are incident with respect to the plane of the layered composite at an inclined angle in relation to the normal. The relief structures of the mosaic surfaces (11; 12) are different in spatial frequency only, the difference in the spatial frequencies of the relief structures in the neighbouring mosaic surfaces (11; 12) being 40 lines/mm max.
IPC 1-7
IPC 8 full level
B42D 15/00 (2006.01); B42D 25/29 (2014.01); G02B 5/18 (2006.01); G03G 21/04 (2006.01)
CPC (source: EP US)
B42D 25/29 (2014.10 - EP US); G03G 21/043 (2013.01 - EP US); B42D 25/328 (2014.10 - EP US); Y10T 428/1486 (2015.01 - EP US); Y10T 428/24331 (2015.01 - EP US); Y10T 428/24355 (2015.01 - EP US); Y10T 428/24802 (2015.01 - EP US); Y10T 428/24851 (2015.01 - EP US); Y10T 428/24876 (2015.01 - EP US); Y10T 428/24901 (2015.01 - EP US); Y10T 428/24917 (2015.01 - EP US); Y10T 428/24997 (2015.04 - EP US); Y10T 428/31678 (2015.04 - EP US)
Citation (search report)
See references of WO 02100653A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 02100653 A1 20021219; AT E299803 T1 20050815; CZ 20033305 A3 20040414; CZ 302060 B6 20100922; DE 10127981 C1 20030116; DE 50203685 D1 20050825; EP 1392520 A1 20040303; EP 1392520 B1 20050720; ES 2246014 T3 20060201; JP 2004528213 A 20040916; JP 4384487 B2 20091216; PL 199079 B1 20080829; PL 365799 A1 20050110; PT 1392520 E 20051130; TW 577833 B 20040301; US 2004135365 A1 20040715; US 7144617 B2 20061205
DOCDB simple family (application)
EP 0205984 W 20020531; AT 02745339 T 20020531; CZ 20033305 A 20020531; DE 10127981 A 20010608; DE 50203685 T 20020531; EP 02745339 A 20020531; ES 02745339 T 20020531; JP 2003503449 A 20020531; PL 36579902 A 20020531; PT 02745339 T 20020531; TW 91111626 A 20020531; US 47699403 A 20031105