Optical pickup device with objective lens movable in two directi

Details Optical pickup device with objective lens movable in two directi Optical pickup device with objective lens movable in two directi

1986-08-15

1988-08-23

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 44, 250201, 350247, G11B 708, G02B 702

Patent

active

047665831

ABSTRACT:
An optical pickup device comprising an objective lens having an optic axis for focusing a light beam emitted from a light source on an optical recording medium. The objective lens is carried on a support member which is coupled with a base through a coupling unit. The coupling unit has a first rotation axis parallel to the optic axis for permitting rotation of the support member about the first rotation axis in a tracking direction perpendicular to the optic axis and a second rotation axis perpendicular to the optic axis for permitting rotation of the support member about the second rotation axis in a focusing direction parallel to the optic axis. The support member has a center of gravity positioned substantially on the first rotation axis. A light beam reflected from the optical recording medium is sensed for exerting a force on the support member to move the objective lens in the focusing and/or tracking directions so as to adjust the optic axis to a desired position.

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patent: 4615355 (1986-10-01), Kasahara
patent: 4615585 (1986-10-01), Van Sluys et al.
patent: 4633456 (1986-12-01), Luecke
patent: 4646283 (1987-02-01), Ito et al.
patent: 4679904 (1987-07-01), Kurihara
patent: 4680743 (1987-07-01), Araki

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