Hologram having authenticating information recorded therein

Details Hologram having authenticating information recorded therein Hologram having authenticating information recorded therein

2005-01-18

2005-01-18

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

Reexamination Certificate

active

06844945

ABSTRACT:
The invention relates to a hologram having authenticating information recorded in such a way that the information is little viewable in an ordinary viewing state and so having high counterfeit-proofness. In a 3D image-reconstructing hologram10,a minute object11that is authenticating information is located behind a shielding block12of visually easy-to-perceive size, so that the authenticating information is hidden by the shielding block in a given viewing direction and so is not exposed to view, but can be viewed from a direction different from said given direction.

REFERENCES:
patent: 4119361 (1978-10-01), Greenaway
patent: 4304809 (1981-12-01), Moraw et al.
patent: 4537504 (1985-08-01), Baltes et al.
patent: 4544266 (1985-10-01), Antes
patent: 6121994 (2000-09-01), Kuribayashi et al.
patent: 0 916 506 (1999-05-01), None
patent: 9-319290 (1997-12-01), None
patent: 11-21793 (1999-01-01), None
patent: 2000-214750 (2000-08-01), None
patent: 2001-13858 (2001-01-01), None
patent: WO 0021033 (2000-04-01), None
Japanese Abstract No. 03226775, dated Oct. 7, 1991.

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