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:
May. 03, 2011
Filed:
Jul. 13, 2006
Kouretsu Boku, Kyoto, JP;
Kanji Wakabayashi, Kyoto, JP;
Yoshiaki Komma, Osaka, JP;
Hideki Hayashi, Nara, JP;
Kouretsu Boku, Kyoto, JP;
Kanji Wakabayashi, Kyoto, JP;
Yoshiaki Komma, Osaka, JP;
Hideki Hayashi, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A highly reliable optical pickup which is not likely to collide with an optical disk is provided. Relative positions of two objective lensesand(along a focus direction) on a lens holderare determined so that, while the objective lenshaving a longer working distance is focused on an optical disk, the objective lenshaving a shorter working distance and a protective memberare at positions which are more distant from the optical diskthan a height h of a protrusion which is present in an inner peripheral region of the optical disk optical disk