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. 13, 2006
Filed:
Jul. 31, 2001
Makoto Itonaga, Yokohama, JP;
Atsushi Hayami, Yokohama, JP;
Junichiro Tonami, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
An optical information recording medium () is composed of a pit recording area (), wherein various control information is recorded by a prepit, and a user recording area () having a guide groove formed in a groove format, and a phase depth for the prepit and the groove are approximately the same wherein the phase depth is less than or equal to λ/10, wherein λ is a wavelength for reproducing light source. A recording/reproducing apparatus () for the optical information recording medium () includes decoding means () for decoding information by detecting a tangential push-pull reproduced signal from the prepit recording area () and detecting an aggregated signal from the user recording area ().