EP 1038200 A1 20000927 - A DIFFRACTIVE DEVICE WITH THREE-DIMENSIONAL EFFECTS
Title (en)
A DIFFRACTIVE DEVICE WITH THREE-DIMENSIONAL EFFECTS
Title (de)
EIN DIFFRAKTIVES BAUELEMENT MIT DREIDIMENSIONALEN EFFEKTEN
Title (fr)
DISPOSITIF DE DIFFRACTION A EFFETS TRIDIMENSIONNELS
Publication
Application
Priority
- AU 9801014 W 19981209
- AU PP081797 A 19971209
Abstract (en)
[origin: WO9930200A1] A diffractive device has a surface relief structure which, when illuminated by a light source, generates two or more diffraction images which, when observed by an observer from an appropriate range of viewing angles, appear as one or more three-dimensional images. Preferably, a left-eye diffraction image is generated by light diffracted from a plurality of surface regions each of which has a diffractive structure with a first orientation, and a right-eye diffraction image is generated by light diffracted from a plurality of surface regions each of which has a diffractive structure with a second orientation which differs in angle from the first orientation, and the two diffraction images when viewed by an observer from an appropriate range of viewing angles appear as a single three-dimensional image.
IPC 1-7
IPC 8 full level
G02B 5/18 (2006.01)
CPC (source: EP)
G02B 5/1842 (2013.01)
Citation (search report)
See references of WO 9930200A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9930200 A1 19990617; AU PP081797 A0 19980108; EP 1038200 A1 20000927
DOCDB simple family (application)
AU 9801014 W 19981209; AU PP081797 A 19971209; EP 98960872 A 19981209