Optical disk unit

Details Optical disk unit Optical disk unit

1992-07-17

1994-07-12

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4428, 369 32, 369 58, C11B 7085

Patent

active

053295099

ABSTRACT:
An optical disk unit having a light spot incident upon an optical disk. The light spot is radially moved to cross tracks formed on the optical disk. The tracks are provided with specific access marks. The number of access marks passed by the light spot as well as the number of tracks crossed by the light spot until a change is found in a detected access mark are counted. The latter number is divided by the former number and multiplied by a coefficient to provide a speed signal indicative of a speed of the light spot relative to the optical disk.

REFERENCES:
patent: 4866687 (1989-09-01), Kasai et al.
patent: 5063546 (1991-11-01), Ito et al.

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