Method of verifying the authenticity of a security document...

Details Method of verifying the authenticity of a security document... Method of verifying the authenticity of a security document...

2006-02-07

2006-02-07

Le, Que T. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S559400

Reexamination Certificate

active

06995383

ABSTRACT:
Method of verifying the authenticity of a security document (1), the security document including a first at least partially transparent portion (7, 8) and an optical projection element (9) within or superposed with the first at least partially transparent portion (7, 8), the optical projection element (9) acting to transform a light beam (10a) passing from a light beam source through said first at least partially transparent portion (7, 8) into a patterned beam (11) of selected design, the method including the steps of: positioning the security document such that the light beam is transmitted through the first at least partially transparent portion and the patterned beam is projected onto a viewing surface (14), and verifying the presence of a patterned image by the impingement of the patterned beam on the viewing surface (14).

REFERENCES:
patent: 4536016 (1985-08-01), Solomon et al.
patent: 5275870 (1994-01-01), Halope et al.
patent: 5393099 (1995-02-01), Salvatore
patent: 5449200 (1995-09-01), Andric et al.
patent: 5546198 (1996-08-01), van der Gracht et al.
patent: 5678863 (1997-10-01), Knight et al.
patent: 5886798 (1999-03-01), Staub et al.
patent: 5892239 (1999-04-01), Nagase
patent: 6270610 (2001-08-01), Benoit et al.
patent: 3208204 (1983-09-01), None
patent: 655316 (1995-05-01), None
patent: 2268906 (1994-01-01), None
patent: WO 83/00659 (1993-03-01), None
patent: WO 94/29105 (1994-12-01), None
patent: WO 94/29119 (1994-12-01), None
patent: WO 97/47478 (1997-12-01), None
patent: WO 98/15418 (1998-04-01), None
patent: WO 98/32590 (1998-07-01), None

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