Optical head devices for use in disc players

Details Optical head devices for use in disc players Optical head devices for use in disc players

1989-06-07

1990-03-27

Psitos, Aristotelis M.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369122, 369111, 350255, G11B 700

Patent

active

049126938

ABSTRACT:
An optical head device for use in a disc player has a light beam generating and detecting unit for generating a light beam emerging therefrom and detecting a light beam coming thereto from the outside, an object lens driving unit for supporting an object lens and moving the same in both a first direction along an optical axis of the object lens and a second direction substantially perpendicular to the first direction, and a movable base member for supporting the light beam generating and detecting unit and the object lens driving unit both mounted thereon so that the light beam emerging from the light beam generating and detecting unit is incident through a predetermined path upon the object lens supported by the object lens driving unit. In an embodiment, the movable base member is formed into the shape of a plate, and the light beam generating and detecting unit and the object lens driving unit are mounted respectively on opposite surfaces of the movable base member.

REFERENCES:
patent: 4437177 (1984-03-01), Watabe et al.
patent: 4571715 (1986-02-01), Kato et al.
patent: 4727529 (1988-02-01), Arahi et al.
patent: 4737946 (1988-04-01), Yamashita et al.
patent: 4751694 (1988-06-01), Naito et al.
JP article: vol. 58; No. 11, 1984, pp. 4-7.

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