Optical disk player including a plurality of independent pick-up

Details Optical disk player including a plurality of independent pick-up Optical disk player including a plurality of independent pick-up

1992-10-29

1994-09-13

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 50, G11B 700

Patent

active

053475062

ABSTRACT:
An optical disk player for simultaneously reading data recorded on different areas of the optical disk is disclosed. The optical disk player provides a plurality of pairs of optical pick-ups and pick-up positioning mechanisms. A rotational speed of the optical disk is controlled according to a synchronization signal obtained from a first pick-up and the first pick-up can read the recorded data by a normal method, however, other pick-ups need to change read rates according to respective linear velocity. Therefore, reading speed changing circuits are provided for each of the optical pick-ups except a first pick-up and they change read rates according to linear velocities of the optical disk at reading positions.

REFERENCES:
patent: 3829610 (1974-08-01), Meeussen et al.
patent: 3946367 (1976-03-01), Wohlmut et al.
patent: 5086419 (1992-02-01), Yanagi
patent: 5161142 (1992-11-01), Okano

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