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:
May. 11, 1999
Filed:
Sep. 11, 1997
Hideyoshi Horimai, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A recording medium such as an optical or magneto-optical disk divided into servo areas and data areas, wherein at least one of pits in each servo area is formed with a phase deviation. There are also disclosed a method of recording pits on such a recording medium, and an apparatus for recording data on and/or reproducing the same from the recording medium. The apparatus comprises a light source for irradiating a light output to the recording medium; a photoelectric converter for receiving the light emitted from the light source and reflected from or transmitted through the recording medium, and converting the received light into an RF signal; a signal converter for converting the output RF signal of the photoelectric converter into a binary signal corresponding to the pit formed on the recording medium; and a detector for detecting the servo area on the recording medium on the basis of the phase deviation of the binary signal outputted from the signal conversion means; wherein data is recorded or reproduced while a servo action is executed in accordance with the servo byte in the servo area detected by teh detector.