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:
Jun. 04, 2002
Filed:
Mar. 23, 1994
Tamotsu Maeda, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical disk drive comprises a spindle motor ( ) and an optical pickup ( ) provided with an objective lens ( ) for focusing a light beam on an optical recording disk ( ) held on a disk table which is driven for rotation by the spindle motor ( ). The spindle motor ( ) is disposed with its center axis (P ) of vibration inclined at an angle (&Dgr;&thgr;) to a reference scanning line (P ) intersecting the center axis of the spindle motor ( ) and the optical axis of the objective lens ( ). Since the center axis (P ) of vibration is inclined at an angle (&Dgr;&thgr;) to the reference scanning line (P ), the adverse effect of the resonant vibrations of the spindle motor ( ) on the operation of the optical disk drive for focusing a light beam on the optical recording disk ( ) and positioning the objective lens ( ) for tracking is reduced.