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:
Jan. 20, 2009
Filed:
Jan. 28, 2005
Soh Noguchi, Kawasaki, JP;
Tsutomu Sato, Yokahama, JP;
Tatsuya Tomura, Tokyo, JP;
Yasunobu Ueno, Yokahama, JP;
Soh Noguchi, Kawasaki, JP;
Tsutomu Sato, Yokahama, JP;
Tatsuya Tomura, Tokyo, JP;
Yasunobu Ueno, Yokahama, JP;
Ricoh Company, Ltd., , JP;
Abstract
A recording method of recording information in a dye-based write-once digital versatile disc (DVD) containing a substrate having a wobbled guide groove and a recording layer containing an organic dye. Recording is performed by irradiating the DVD with three kinds of single light pulses. Each single pulse contains a recording area to record a mark and a cooling area having a light quantity not greater than 0.1 mW for a predetermined time. When the mark having a shortest length is formed, the DVD is irradiated with a first single light pulse. When the mark having a second shortest length is formed, the DVD is irradiated with a second single light pulse. When the mark having a third shortest length or longer is formed, the DVD is irradiated with a third single light pulse.