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. 21, 2010
Filed:
Sep. 13, 2005
Optical recording medium, recording method thereof and evaluation method of optical recording medium
Masaki Kato, Sagamihara, JP;
Kazunori Ito, Yokohama, JP;
Hiroshi Deguchi, Yokohama, JP;
Hiroko Ohkura, Yokohama, JP;
Mikiko Takada, Yokohama, JP;
Hiroyoshi Sekiguchi, Yokohama, JP;
Masaki Kato, Sagamihara, JP;
Kazunori Ito, Yokohama, JP;
Hiroshi Deguchi, Yokohama, JP;
Hiroko Ohkura, Yokohama, JP;
Mikiko Takada, Yokohama, JP;
Hiroyoshi Sekiguchi, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A recording method of an optical recording medium comprises irradiating the medium with a laser having m pulse sets each comprising a heating pulse and a cooling pulse, in which m is a natural number; and scanning the medium with the laser at a scanning speed v to record marks each of a length nT, in which n is a natural number of 3 or more and T is a clock cycle, wherein a length Tof a final cooling pulse is determined in accordance with the scanning speed v using the following functions, in v<v, T/T=f(v) in v v, T/T=f(v), where the f(v) and f(v) each represents a continuous function of the scanning speed v and satisfies the condition where an existence ratio of abnormal marks is 1.0×10or less, and vis a selectable scanning speed.