Three dimensional electro-optical retrieval system

Details Three dimensional electro-optical retrieval system Three dimensional electro-optical retrieval system

1974-05-22

1976-03-23

Fears, Terrell W.

Communications: electrical

Digital comparator systems

340173LT, 17910041L, G11C 1304

Patent

active

039463672

ABSTRACT:
A system for sensing information located in tracks in various layers or depths of a recording medium. The desired information is electro-optically tracked in three dimensions to provide sensing of the information contained in the multi-layered recording medium.

REFERENCES:
patent: 3518442 (1970-06-01), Johnson
patent: 3626386 (1971-12-01), Feinleib
patent: 3820087 (1974-06-01), Chaudhari

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