Method of and apparatus for optically writing, reading and erasi

Details Method of and apparatus for optically writing, reading and erasi Method of and apparatus for optically writing, reading and erasi

1991-03-25

1995-04-18

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4428, 369 4437, 369 4438, 369 94, 369112, 3692754, 369284, G11B 709

Patent

active

054084539

ABSTRACT:
A method of and an apparatus for writing and reading and/or erasing a multilayer record carrier (1) having a guide plane (2) and a plurality of recording planes (4) are described, using a guide beam (5) which cooperates with the guide plane (2) and a scanning beam (6) for at least writing in the recording planes (4). During writing the position of the scanning focus (36) formed by the scanning beam (6) is coupled to the focus (11) of the guide beam (5) which is actively controlled by using guide information which is present in the guide plane (2). During reading the scanning beam (6) is actively controlled by its own servosystem (20-28).

REFERENCES:
patent: 3689899 (1972-09-01), Franaszek
patent: 3876842 (1975-04-01), Bouwhuis
patent: 3999009 (1976-12-01), Bouwhuis
patent: 4023033 (1977-05-01), Bricot et al.
patent: 4337532 (1982-06-01), Oprendi et al.
patent: 4491940 (1985-01-01), Tinet
patent: 4533826 (1985-08-01), Van Alem
patent: 4665310 (1987-05-01), Heemskerk
patent: 4959824 (1990-09-01), Ueda et al.
patent: 5033040 (1991-07-01), Fujita
patent: 5097464 (1992-03-01), Nishiuchi et al.

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