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:
Aug. 16, 2011
Filed:
Feb. 27, 2007
Toshiyasu Tanaka, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Kousei Sano, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Keiichi Matsuzaki, Osaka, JP;
Kanji Wakabayashi, Kyoto, JP;
Toshiyasu Tanaka, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Kousei Sano, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Keiichi Matsuzaki, Osaka, JP;
Kanji Wakabayashi, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical pickup includes: a laser light source which outputs an divergent beam having an elliptical far-field pattern; a beam shaping element having at least one cylindrical plane and which shapes the divergent beam outputted from the laser light source into an divergent beam having a prescribed shape in which at least the length in the major axis direction of the elliptical shape is shortened; a light collecting portion having a beam splitter which perpendicularly collects the divergent beam that is outputted from the beam shaping element and which has a prescribed shape on the recording surface of an optical disk , and a mirror or the like; and a light detecting portion The optical axis of the divergent beam is rotated so that the direction in which the major axis of the divergent beam having a prescribed shape is shortened conforms to the radial direction of an optical information recording medium.