EP 2005225 A2 20081224 - HYBRID REFLECTION HOLOGRAM
Title (en)
HYBRID REFLECTION HOLOGRAM
Title (de)
HYBRIDES REFLEXIONSHOLOGRAMM
Title (fr)
HOLOGRAMME HYBRIDE PAR REFLEXION
Publication
Application
Priority
- US 2007064325 W 20070319
- US 78350206 P 20060317
- US 45982106 A 20060725
Abstract (en)
[origin: WO2007109626A2] Hybrid white-light viewable holograms and methods for making them. The holograms are hybrid reflection holograms made using the diffractive structures or gratings of a holographic object such as a transmission hologram or holographic optical element (HOE). The wavefronts of the diffractive structures are converted into a reflection hologram by scanning them with a coherent light source having a profiled narrow beam. The hybrid reflection hologram can exhibit display parameters including the multiple colors, solidity, and color stability of white light reflection holograms, the diffractive color shifting of a white light transmission hologram, three dimensional imaging and a wide variety of dynamic changes. Different areas or images with each of these effects can be combined in a single hologram. These hybrid reflection holograms are ideal for security and forgery prevention applications.
IPC 8 full level
G02B 5/32 (2006.01)
CPC (source: EP)
G03H 1/202 (2013.01); G03H 1/0011 (2013.01); G03H 1/0248 (2013.01); G03H 1/0406 (2013.01); G03H 1/0408 (2013.01); G03H 2001/205 (2013.01); G03H 2001/207 (2013.01); G03H 2001/2231 (2013.01)
Citation (third parties)
Third party :
- US 4209250 A 19800624 - JAMES RANDALL P [US], et al
- US 4995685 A 19910226 - ARMSTRONG MARK L [US], et al
- EP 1217469 A2 20020626 - DU PONT [US]
- EP 1511636 B1 20080903 - GIESECKE & DEVRIENT GMBH [DE]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007109626 A2 20070927; WO 2007109626 A3 20080117; CA 2680255 A1 20070927; CA 2680255 C 20180327; EP 2005225 A2 20081224; EP 2005225 A4 20090408
DOCDB simple family (application)
US 2007064325 W 20070319; CA 2680255 A 20070319; EP 07758837 A 20070319