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:
Jul. 23, 2012
Filed:
Jan. 22, 2007
Keiichi Matsuzaki, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Toshiyasu Tanaka, Osaka, JP;
Kousei Sano, Osaka, JP;
Kanji Wakabayashi, Kyoto, JP;
Hidenori Wada, Kyoto, JP;
Keiichi Matsuzaki, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Toshiyasu Tanaka, Osaka, JP;
Kousei Sano, Osaka, JP;
Kanji Wakabayashi, Kyoto, JP;
Hidenori Wada, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A small optical pickup of wide spherical aberration correction range includes a rising mirror for perpendicularly deflecting a light beam and guiding the light beam to an objective lens; a spherical aberration correction lens having one surface formed to a larger curvature than the other surface; a lens holder for holding the correction lens so that the surface of large curvature projects towards the rising mirror side; an axially extending guide member; and a slidable part slidable along the guide member. The projecting portion of the slidable part is configured to be fitted within the side surface of the reflecting surface of the rising mirror, and the projecting portion from the lens holder of the spherical aberration correction lens overlaps the reflecting surface of the rising mirror when the spherical aberration correction lens approaches the rising mirror the most.