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:
Apr. 14, 1992
Filed:
Feb. 19, 1991
Hiroyuki Ohira, Yamanashi, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Pioneer Video Corporation, Yamanashi, JP;
Abstract
An optical recording method comprising steps of forming a groove on a surface of a recording medium, such as a recording disk, by projecting a write beam, such as a laser beam, onto the surface of the recording medium, and wobbling the write beam in a direction perpendicular to the groove to be formed, whereby the write beam is wobbled on the surface of the recording medium with a period of deviation not greater than one half of the diameter of the spot of the write beam. The groove formed by the present invention has a width greater than the diameter of the write beam and sharp edges for providing satisfactory characteristics in recording and reproducing.