Laser imaged identification card

Details Laser imaged identification card Laser imaged identification card

1993-12-22

1995-06-06

Payer, Hwei Siu

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283 7793, 430140, B42D 1510

Patent

active

054216192

ABSTRACT:
An optical data identification card for an individual containing a photograph of the authorized user and a strip of optical contrast laser recording material with a laser-written macroscopic bi-level image of the authorized user to authenticate the photograph. The bi-level image is constructed by applying a dither matrix to a digital image file corresponding to the photograph. Each dark pixel consists of an array of high-density laser recorded spots or lines.

REFERENCES:
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patent: 4680459 (1987-07-01), Drexler
patent: 4687526 (1987-08-01), Wilfert
patent: 4692394 (1987-09-01), Drexler
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patent: 5106719 (1992-04-01), Oshikoshi et al.
patent: 5157424 (1992-10-01), Craven et al.
patent: 5161826 (1992-11-01), Van Giesen et al.
"Photo-Protected Credit Card", J. W. Kelley, IBM Technical Disclosure Bulletin, vol. 20 No. 11 A, Apr. 1978.

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