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:
Sep. 26, 2017
Filed:
Jan. 17, 2014
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/1372 (2012.01); G11B 7/128 (2012.01); G11C 13/04 (2006.01); G11B 7/0045 (2006.01); G11B 7/0065 (2006.01); G11B 7/127 (2012.01); G11B 7/007 (2006.01); G11B 7/00 (2006.01); G11B 7/0033 (2006.01);
U.S. Cl.
CPC ...
G11B 7/128 (2013.01); G11B 7/0045 (2013.01); G11B 7/0065 (2013.01); G11B 7/00772 (2013.01); G11B 7/127 (2013.01); G11B 7/1372 (2013.01); G11C 13/04 (2013.01); G11B 7/0033 (2013.01); G11B 2007/0009 (2013.01);
Abstract
In recording technologies for batch formation of a plurality of recording bits in a recording medium by forming a plurality of optical spots using an ultrashort pulse laser and a spatial optical modulator, the batch recordable bit number has an upper limit, resulting in restricted recording speed. The intensity of the optical spot is corrected to increase the batch recordable bit number for increasing the recording speed.