(19)
(11) EP 1 671 263 A2

(12)

(88) Date of publication A3:
16.06.2005

(43) Date of publication:
21.06.2006 Bulletin 2006/25

(21) Application number: 04768559.9

(22) Date of filing: 20.09.2004
(51) International Patent Classification (IPC): 
G06K 19/06(1968.09)
B42D 15/10(1990.01)
G07D 7/12(2000.01)
B42D 15/00(1968.09)
(86) International application number:
PCT/GB2004/004013
(87) International publication number:
WO 2005/029400 (31.03.2005 Gazette 2005/13)
(84) Designated Contracting States:
CZ DE FR GB

(30) Priority: 19.09.2003 GB 0322031

(71) Applicant: Optaglio Limited
Hants SP10 4DU (GB)

(72) Inventors:
  • RYZI, Zbynek
    25086 Rez u Prahy 199 (CZ)
  • TETHAI, Thomas
    25086 Rez u Prahy 199 (CZ)

(74) Representative: Gill, David Alan 
W.P. Thompson & Co., 55 Drury Lane
London WC2B 5SQ
London WC2B 5SQ (GB)

   


(54) OPTICALLY VARIABLE DIFFRACTIVE DEVICE AND RELATED APPARATUS AND METHOD OF READING