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:
Aug. 03, 2004
Filed:
Sep. 17, 2002
Applicant:
Inventor:
Kenya Yokoi, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract
An information recording method records information on an optical disk by a recording pulse signal of an optical beam that is emitted from an optical source. A recording channel clock period T is changed depending on a change of a recording linear velocity so that a recording linear density is maintained approximately constant. In addition, a shape of a pulse waveform of a top heating portion of the recording pulse signal which includes a rear heating portion, is changed at predetermined intervals depending on a desired recording linear velocity, so that a width of the top heating portion and a recording power thereof are changed.