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:
Mar. 14, 2006
Filed:
Mar. 28, 2002
Syuji Tsukamoto, Tokyo, JP;
Syuji Tsukamoto, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
An optical recording method for irradiating an optical recording mediumwith a laser beam to form recording marksA toG. The method includes defining contiguously a virtual recording cellin a displacement direction S on the recording layer, setting reference irradiating time with the laser beam to five stages or more, and defining a predetermined waiting time in a neighboring subsequent virtual recording cell, corresponding to the length of the reference irradiating time in the preceding virtual recording cell. The method also includes setting actual irradiating time by subtracting the waiting time from the reference irradiating time for irradiation of the aforementioned subsequent virtual recording cellThe method further includes irradiating with the laser beam during the aforementioned actual irradiating time by delaying the irradiation initiation timing by the waiting time to form at least five types of recording marksA toG having different sizes, thereby performing multi-level recording of information.