Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2007-03-20
2007-03-20
Frech, Karl D. (Department: 2876)
Registers
Coded record sensors
Particular sensor structure
C235S454000
Reexamination Certificate
active
10471134
ABSTRACT:
The system comprises a mark (2) which is placed on an object (3) or a document, or which is constituted by the entire or part of said object, in addition to a read device (5) enabling said mark to be identified. The latter is made of transparent or semi-transparent materials having a given wavelength and capable of propagating light. The mark (2) has a surface state and a microstructure enabling optical coupling with the read device (5) comprising a monochromatic
on-monochromatic light source (11), a prism (4) onto which the light (L) is directed, and a detector (18) receiving the light reflected (R), when the prism (4) is optically coupled with the mark (2), with a frustrated reflection effect. The system can be used for the recognition of objects and documents and for the authentication of objects in order to combat fraud and counterfeiting.
REFERENCES:
patent: 4704519 (1987-11-01), Kulikauskas
patent: 5352879 (1994-10-01), Milch
patent: 5578809 (1996-11-01), Yamaji et al.
patent: 6002139 (1999-12-01), Katagiri
patent: 0 478 137 (1992-04-01), None
patent: 59 066777 (1984-04-01), None
patent: WO 87/06197 (1987-10-01), None
patent: WO 92/04192 (1992-03-01), None
patent: WO 97/50053 (1997-12-01), None
International Search Report; PCT/FR02/00911; Jul. 18, 2002.
Bidault Louis
Bonardi Nicolas
Le Luyer Cecile
Mugnier Jacques
Cantor & Colburn LLP
Frech Karl D.
TEB
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