Multi-beam optical recording/reproducing apparatus for recording

Details Multi-beam optical recording/reproducing apparatus for recording Multi-beam optical recording/reproducing apparatus for recording

1990-10-15

1992-07-21

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4426, 369 4411, 369110, 369112, 3692751, 3692753, G11B 700

Patent

active

051329530

ABSTRACT:
An optical recording/reproducing apparatus wherein a main beam is converged and projected onto a flat part between tracking guide groove parts adjacent to each other in an optical recording medium to record, reproduce or erase information, two sub-beams on both sides of the main beam are respectively converged and projected so as to cover the guide groove parts to form a tracking system for controlling tracking and one of the two sub-beams is utilized to discriminate the flat part.

REFERENCES:
patent: 4238843 (1980-12-01), Carasso et al.
patent: 4385303 (1983-05-01), Akahira et al.
patent: 4451863 (1984-05-01), Yanagida et al.
patent: 4507763 (1985-03-01), Kato
patent: 4587648 (1986-05-01), Ando
patent: 4689781 (1987-08-01), Ando

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