Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1986-06-18
1987-12-01
Pitts, Harold I.
Registers
Systems controlled by data bearing records
Credit or identification card systems
235473, 235487, G06K 500
Patent
active
047106140
ABSTRACT:
A security document comprising a substrate containing at least one optical fiber of which at least one end is flush with a surface of the substrate so as to permit authentication of the document by a test based on the exposure of the document to a source of electromagnetic radiation and simultaneous observation of the radiation transmitted to either end of the optical fiber. The optical fiber has a transparent coating and is located within the substrate at a depth from at least one surface of the substrate which is not greater than the depth of penetration of the electromagnetic radiation into the substrate. The radiation which penetrates the substrate to the optical fiber is trapped in the optical fiber and transmitted to at least one end at which it is observed to authenticate the document.
REFERENCES:
patent: 4138057 (1979-02-01), Atalla
Arjomari-Prioux
Pitts Harold I.
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