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:
Jun. 05, 2007
Filed:
May. 08, 1995
Tsuyoshi Toda, Kodaira, JP;
Takeshi Maeda, Kokubunji, JP;
Fumio Kugiya, Hachioji, JP;
Hiroshi Ide, Kodaira, JP;
Hiroyuki Tsuchinaga, Odawara, JP;
Fumiyoshi Kirino, Tokyo, JP;
Toshimitsu Kaku, Sagamihara, JP;
Kazuo Shigematsu, Saitama, JP;
Tsuyoshi Toda, Kodaira, JP;
Takeshi Maeda, Kokubunji, JP;
Fumio Kugiya, Hachioji, JP;
Hiroshi Ide, Kodaira, JP;
Hiroyuki Tsuchinaga, Odawara, JP;
Fumiyoshi Kirino, Tokyo, JP;
Toshimitsu Kaku, Sagamihara, JP;
Kazuo Shigematsu, Saitama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method of recording data into a recording medium by forming a recording region which is physically different from the nonrecorded portions is disclosed. The optical data recording/reproducing method includes a first trial writing operation in which trial writing data are recorded into the recording medium while changing the recording power conditions, the recorded trial writing data are reproduced, and the reproduced trial writing data are evaluated to set an optimum recording power. The method also includes a second trial writing operation in which trial writing data are recorded into the recording medium while changing the servo conditions, the recorded trial writing data are reproduced, and the reproduced trial writing data are evaluated to set optimum servo conditions.