The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1988
Filed:
Aug. 15, 1986
Hiroshi Oinoue, Tokyo, JP;
Yoshimasa Goda, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
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.