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:
Oct. 13, 1987
Filed:
Jan. 26, 1984
Applicant:
Inventor:
Shigeru Aoi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
369 44 ; 369 46 ; 369 54 ; 369 51 ;
Abstract
An optical information recording method comprises a first step of scanning a radiation beam on a disk-like recording medium without effecting tracking control, and recording information as concentric circular or spiral information tracks for at least one round on the recording medium, and a second step of scanning the radiation beam while effecting tracking control so as to keep a predetermined interval with respect to an information track recorded one round previously, thereby recording the information on the recording medium.