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:
Jan. 26, 2010
Filed:
Jun. 20, 2005
Katsuhiko Yasuda, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Takeharu Yamamoto, Osaka, JP;
Toshio Matsumoto, Kyoto, JP;
Katsuhiko Yasuda, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Takeharu Yamamoto, Osaka, JP;
Toshio Matsumoto, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical information apparatus includes a laser which emits a light beam, an objective lens and the like which converge a light beam emitted from the laser on an optical recording medium, spherical aberration correction instrument which is arranged on an optical axis of the light beam which links the laser and the objective lens, and corrects a spherical aberration generated on the optical recording medium. Correction is performed so that outgoing power of the laser changes according to a correction amount by the spherical aberration correction instrument.