Data system containing a high capacity optical contrast...

Details Data system containing a high capacity optical contrast... Data system containing a high capacity optical contrast...

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G11B 7/24 (2006.01) G06K 19/14 (2006.01) G11B 7/00 (2006.01) G11B 7/0033 (2006.01) G11B 7/013 (2006.01) G11B 7/26 (2006.01)

Patent

CA 1246220

Abstract Data System Containing A High Capacity Optical Contrast Laser Recordable Wallet-Size Plastic Card A data card having an optical, high resolution laser recording material, such as a metal-containing film, adhering to it. The strip of laser recording material has a capacity for recording at least 250,000 data bits represented by optically contrasting spots having a dimension of less than 25 microns. The optical contrast of the spots with respect to the surrounding field is at least two to one. The strip may have a preinscribed formatting pattern for positioning, timing, programming and related functions.

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