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:
Mar. 09, 2010
Filed:
Apr. 03, 2007
Satoshi Hineno, Kanagawa, JP;
Satoshi Hineno, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical disk apparatus includes an optical pickup and a disk-rotation driving unit configured to rotationally drive the optical disks. The optical pickup includes a first emission unit configured to emit a first wavelength beam; a second emission unit configured to emit a second wavelength beam; a third emission unit configured to emit a third wavelength beam; an objective lens configured to focus the first to third wavelength beams emitted from the first to third emission units, respectively, at a signal recording surface of an optical disk; a light-path combining unit configured to combine an optical path of the first wavelength beam emitted from the first emission unit and an optical path of the second and third wavelength beams emitted from the second and third emission units, respectively; and an aberration correcting unit provided on the optical path of the second and third wavelength beams.