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:
Nov. 02, 2004
Filed:
Dec. 08, 2000
Taiyo Yuden Co., Ltd., Tokyo, JP;
Abstract
An optical information recording/reproducing method and a device are provided, which can optimally record and reproduce information onto and from an optical information recording medium such as CD-R or DVD-R for high-density recording. A reproducing signal corresponding to a pit-land pattern recorded on the optical information recording medium is obtained by irradiating laser light to the optical information recording medium to judge a relative effective spot diameter of the laser light corresponding to a standard length T according to the reproducing signal, a correction range at recording of information is specified according to the judged effective spot diameter, a recording pulse is corrected according to the specified correction range, and a correction range of the reproducing signal at reproduction of information is specified to correct the reproducing signal according to the specified correction range.