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:
Nov. 17, 2015
Filed:
Nov. 26, 2014
Applicant:
Panasonic Corporation, Osaka, JP;
Inventors:
Kazuhiro Minami, Osaka, JP;
Yasuhiro Tanaka, Hyogo, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/50 (2006.01); G02B 13/18 (2006.01); G11B 7/00 (2006.01); G11B 7/1374 (2012.01); G11B 7/095 (2006.01); G11B 7/1392 (2012.01); G02B 27/00 (2006.01); G02B 13/00 (2006.01); G02B 3/04 (2006.01); G02B 5/18 (2006.01); G11B 7/24009 (2013.01);
U.S. Cl.
CPC ...
G11B 7/1374 (2013.01); G02B 3/04 (2013.01); G02B 5/1814 (2013.01); G02B 13/00 (2013.01); G02B 13/18 (2013.01); G02B 27/0025 (2013.01); G11B 7/0956 (2013.01); G11B 7/13922 (2013.01); G11B 7/13927 (2013.01); G11B 7/24009 (2013.01);
Abstract
An objective lens capable of converging light of a used wavelength with a satisfactory aberration on a recording medium is provided. An objective lens for converging light of a predetermined wavelength λ on a recording medium satisfies the following condition: |CML|+|CMF|<0.03 λ, where CML is an amount of a generated third-order coma aberration per 1 degree of tilt of the objective lens, and CMF is an amount of a generated third-order coma aberration per 1 degree of tilt of off-axis light.