Method and apparatus for reproducing signals using an optical di

Details Method and apparatus for reproducing signals using an optical di Method and apparatus for reproducing signals using an optical di

1991-07-23

1993-12-07

McElheny, Jr., Donald E.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

G11B 712

Patent

active

052688860

ABSTRACT:
A reproducing method for the V-shape groove optical disk is disclosed in which three laser beams are irradiated on a disk, and the reflected laser beams are focused on three light receiving units through object lens. The laser beams irradiated on two light receiving units are used for reproducing signal. Each of the two light receiving units has a light receiving segment which receives a portion of the reflected light beam which is greater than a half of the total reflected light so that a quality of the reproduced signal is improved.

REFERENCES:
patent: 4310916 (1982-01-01), Dil
patent: 4534021 (1985-08-01), Smith
patent: 4569038 (1986-02-01), Nagashima et al.
patent: 4674070 (1987-06-01), Tajima et al.

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