G - Physics – 03 – H
Patent
G - Physics
03
H
88/0.14
G03H 1/02 (2006.01) B42D 15/02 (2006.01) B42D 15/10 (2006.01) G06K 19/08 (2006.01) G06K 19/16 (2006.01)
Patent
CA 1328363
ABSTRACT OF THE DISCLOSURE The present invention is concerned with a certification card such as an ID card or the like including a hologram and an optical recording portion. The hologram is such that amplitude and phase of light waves emitted from an object are recorded and an image of the object is rebuilt by emitting light to reproduce the amplitude and phase of the thus emitted light. On the other hand, the optical recording technique is such that data pits are formed on an optical reflective surface of an optical recording layer and the thus formed data pits are detected by differences in optical reflectivity from the data pits when the object is illuminated by a laser beam so that data are read. According to the present invention a card is constituted by adhering a card front board to a card rear board, with a hologram and optical recording portion formed between the card front board and the card rear board. The such prepared certification card is difficult to be falsified and altered and therefore it has high security.
549088
Fujita Minoru
Fukushima Yoichi
Haga Toshio
Kakinuma Yuji
Fetherstonhaugh & Co.
Kyodo Printing Co. Ltd.
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