Erasable optical wallet-size data card

Details Erasable optical wallet-size data card Erasable optical wallet-size data card

1989-03-03

1993-08-31

Gaffin, Jeffrey A.

Registers

Records

Laminated

235487, 369109, G06K 1900, G11B 724

Patent

active

052411656

ABSTRACT:
An erasable optical, wallet-size data card utilizing an erasable recording strip in which laser written data is recorded. The data card also contains permanently stored prerecorded information in the form of surface contours or photographic marks. The prerecorded information is stored either atop of or directly below the erasable recording strip either in a transparent protective layer, a polymer underlayer or a plastic card base. Both sets of data, the laser written and the prerecorded, may be read and viewed simultaneously without interfering with each other. The erasable material used in the erasable recording strip may be magnetooptical material, amorphous-crystalline material or liquid crystal material or material showing a metal-insulator transition.

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Bartolini et al., "Review and Analysis of Optical Recording Media", Mar. 4, 1976, all pages.

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