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:
Jun. 25, 2013
Filed:
Mar. 13, 2012
Noriaki Terahara, Osaka, JP;
Shinsuke Hatanaka, Osaka, JP;
Toshiyasu Tanaka, Osaka, JP;
Takeshi Ohta, Osaka, JP;
Fumitomo Yamasaki, Nara, JP;
Noriaki Terahara, Osaka, JP;
Shinsuke Hatanaka, Osaka, JP;
Toshiyasu Tanaka, Osaka, JP;
Takeshi Ohta, Osaka, JP;
Fumitomo Yamasaki, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical pickup includes a lens holder; an objective lens provided on the lens holder and having an effective region for collecting light from a light source and an edge located outer to the effective region; and a lens protector provided on the lens holder. The lens protector protrudes toward an optical disc more than the objective lens. The edge of the objective lens includes a convexed portion protruding toward the optical disc. An apex of the effective region of the objective lens protrudes toward the optical disc more than the convexed portion of the edge. A straight line connecting a part of the edge of the objective lens and a part of the lens protector is closer to the optical disc than the apex of the effective region of the objective lens.