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:
Sep. 21, 2010
Filed:
Jan. 30, 2006
Applicants:
Toshiya Matozaki, Tokyo, JP;
Nobuo Takeshita, Tokyo, JP;
Inventors:
Toshiya Matozaki, Tokyo, JP;
Nobuo Takeshita, Tokyo, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 7/09 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical pickup device includes an objective lens () for focusing a light flux onto an information layer of a disk-shaped medium, an objective lens driving unit that drives the objective lens () in a focus servo direction and in a tracking servo direction, a correction lens () disposed on the same optical axis as the objective lens (), and a correction lens driving unit that drives the correction lens () in the same direction as the focus servo direction to control the condition of the light flux incident on the objective lens.