B - Operations – Transporting – 42 – D
Patent
B - Operations, Transporting
42
D
B42D 15/10 (2006.01) B42D 15/00 (2006.01)
Patent
CA 2660061
An optically variable security device comprises a photonic crystal fo which incident light received by the crystal is selectively reflected o transmitted by the crystal to generate a first optically variable effec observable over a first set of directions. Incident light received by the crystal is also selectively reflected or transmitted by the crystal to generate an optical effect observable over a second set of directions that is different from the first set.
L'invention concerne un dispositif de sécurité optiquement variable qui comprend un cristal photonique, la lumière incidente frappant le cristal étant sélectivement réfléchie ou transmise par le cristal pour engendrer un premier effet optiquement variable observable selon un premier ensemble de directions. La lumière incidente frappant le cristal est également sélectivement réfléchie ou transmise par le cristal pour produire un effet optique observable selon un second ensemble de directions différent du premier ensemble.
Borden Ladner Gervais Llp
de La Rue International Limited
LandOfFree
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