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:
Oct. 30, 2012
Filed:
Sep. 26, 2008
Fumitomo Yamasaki, Nara, JP;
Yoshiaki Komma, Osaka, JP;
Kanji Wakabayashi, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
It is aimed to provide an optical head, an optical head manufacturing method and an optical disc device capable of correcting coma aberration generated due to different positions of emission points of a plurality of laser lights having different wavelengths. A two-wavelength laser light sourceis arranged to correct coma aberration generated in a radial direction of a CDin the case where an objective lensis tilted to locate an inner peripheral end of the objective lensin the radial direction of the CDlower than an outer peripheral end thereof, and an objective lens actuatortilts the objective lensto locate the inner peripheral end of the objective lensin the radial direction of the CDlower than the outer peripheral end thereof.