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:
Mar. 25, 2014
Filed:
Mar. 17, 2011
Fumitomo Yamasaki, Nara, JP;
Yoshiaki Komma, Osaka, JP;
Katsuhiko Hayashi, Nara, JP;
Yoshifumi Takasu, Osaka, JP;
Fumitomo Yamasaki, Nara, JP;
Yoshiaki Komma, Osaka, JP;
Katsuhiko Hayashi, Nara, JP;
Yoshifumi Takasu, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A lens surface of an objective lens includes an optical surface formed of a plurality of annular optical surfaces which include an approximately stair-shaped cross section and which are annularly partitioned centered around an optical axis of the objective lens, and a plurality of connecting surfaces that connect the plurality of mutually adjacent annular optical surfaces to each other. The plurality of connecting surfaces include cylindrical connecting surfaces formed of a cylindrical surface centered around the optical axis and a conical connecting surface formed of a conical surface centered around the optical axis, and the conical connecting surface connects the annular optical surface and the annular optical surface.