Radiation imagery chemistry: process – composition – or product th – Holographic process – composition – or product
Patent
1993-07-26
1999-01-05
Hess, Bruce H.
Radiation imagery chemistry: process, composition, or product th
Holographic process, composition, or product
283 85, 283 86, 283 87, 283 88, 359 22, 359 25, 359 26, 359 29, 430 2, G03H 104, G03H 118
Patent
active
058560483
ABSTRACT:
The invention is directed to an information-recorded medium with easily selectable and identifiable items of information, which is virtually protected against forgery and has enhanced security against some improper use, and a method for reading such a medium. This information-recorded medium 1 includes a substrate 2 and a layer 3 with information recorded thereon by the printing of infrared absorbing ink, said layer 3 being provided on the surface of the layer 2. The printed layer 3 is provided thereon with a relief hologram-recorded layer 7 through an adhesive layer 4, said hologram-recorded layer 7 being built up of a reflecting layer 5 transparent to the infrared region and a relief hologram-formed layer 6 provided on the surface of the reflecting layer 5. For reading, the hologram-recorded layer 7 is reconstructed by visible light, while the printed layer is reconstructed by infrared light, and the medium 1 is identified on the basis of the thus reconstructed information.
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Hayakawa Akira
Horiguchi Ryuji
Komaki Shinpei
Kurokawa Shinichi
Sakai Morito
Dai Nippon Printing Co. Ltd.
Hess Bruce H.
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