Digital data record

Details Digital data record Digital data record

1984-06-28

1986-02-18

Pitts, Harold I.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

G11B 700

Patent

active

045717133

ABSTRACT:
An information record has a body of photographic film, paper, plastics material or the like, in which digital information is carried on a body in equal-radii, arcuate rows which extend across the body. The information may be stored as dark spots, light spots or dark-to-light or light-to-dark transitions with respect to transparent substances and in reflective areas, non-reflective areas or reflective-to-non-reflective or non-reflective-to-reflective transitions.

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