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:
Sep. 01, 1992
Filed:
Feb. 01, 1990
Applicant:
Inventors:
Yoshihiko Kudoh, Yawata, JP;
Norio Miyatake, Kobe, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
369 13 ; 369 4413 ; 369110 ; 369112 ;
Abstract
By performing a recording operation and an erasing operation while oscillating a position of a laser beam irradiation on an optical recording medium in a direction perpendicular to the track direction, an improvement in the S/N ratio during reproduction and a reduction of jitter in the detecting signal are attained. As an element for oscillating the laser beam irradiation position in the direction perpendicular to the track direction, an acousto-optical deflector or an electro-optical deflector is used.