Holograms with discontinuous metallization including alpha-numer

Details Holograms with discontinuous metallization including alpha-numer Holograms with discontinuous metallization including alpha-numer

1990-01-25

1991-09-03

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Authentication

283 86, 283 93, 283904, 359572, G02B 518, B44F 112

Patent

active

050447076

ABSTRACT:
Non-continuous reflective hologram or diffraction grating devices are provided in various forms for authenticating documents and things, such as those that contain visual information desired to be protected from alteration. Examples of such information include written personal data and photograph on a passport, driver's license, identity card, transportation pass, and the like. The reflective discontinuous hologram or diffraction device is formed in a pattern that both permits viewing the protected information through it and the viewing of an authenticating image or other light pattern reconstructed from it in reflection. The same master hologram or diffraction grating is made into distinct authentication devices by forming replicas thereof that have different patterns of reflective material which form distinct indicia, such as a different alpha-numeric character.

REFERENCES:
patent: 3282720 (1966-11-01), Oleksiw
patent: 3935334 (1976-01-01), Narui et al.
patent: 4014602 (1977-03-01), Ruell
patent: 4119361 (1978-10-01), Greenaway
patent: 4168088 (1979-09-01), Somlyody
patent: 4210346 (1980-07-01), Mowry, Jr. et al.
patent: 4242378 (1980-12-01), Arai
patent: 4591707 (1986-05-01), Stenzel et al.
patent: 4662653 (1987-05-01), Greenaway
patent: 4673609 (1987-06-01), Hill
patent: 4685138 (1987-08-01), Antes et al.
patent: 4717221 (1988-01-01), McGrew
patent: 4856857 (1989-08-01), Takeuchi et al.

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