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:
Apr. 17, 2007
Filed:
Aug. 20, 2004
Applicants:
Ryo Saitoh, Yokohama, JP;
Makoto Itonaga, Yokohama, JP;
Inventors:
Ryo Saitoh, Yokohama, JP;
Makoto Itonaga, Yokohama, JP;
Assignee:
Victor Company of Japan, Limited, Yokohama, Kanagawa-Ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An aberration correction element is disposed between first to third laser light sources and an objective lens, first and second laser lights emitted from the first and second laser light sources are incident upon the aberration correction element in the form of parallel lights, and a third laser light emitted from the third laser light source is incident upon the aberration correction element in the form of a divergent light.