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:
Feb. 15, 2012
Kazuhiro Minami, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Fumitomo Yamasaki, Nara, JP;
Katsuhiko Hayashi, Nara, JP;
Kazuhiro Minami, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Fumitomo Yamasaki, Nara, JP;
Katsuhiko Hayashi, Nara, JP;
Panasonic Corporation, Kadoma-shi, JP;
Abstract
An objective lens element having improved diffraction efficiency at least one of used wavelengths is provided. The objective lens element includes one surface including: a first region including an optical axis; and a second region surrounding the first region. A periodic first diffraction structure is formed on the first region, and a periodic second diffraction structure different from the first diffraction structure is formed on the second region. The objective lens element satisfies the following conditions.|1−1|<|2−2|  (1)|1|≧|2|  (2)Here,