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. 09, 1986
Filed:
Dec. 17, 1984
Yasuo Ogino, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is disclosed an optical disk apparatus provided with an optical pickup for recording or reproducing information by irradiating an optical disk with a light beam, a tracking device for causing the light beam to exactly follow a track formed on the optical disk, a driving mechanism for moving the optical pickup in the radial direction of the disk for track access, a circuit for outputting a signal representing the rotational position of the disk at the start and end of the track access, and regulating device for starting or terminating the track tracing operation of the tracking device in synchronization with a signal from the signal output circuit, and is also disclosed a track access method for enabling high-speed, precise track access without the influence of track eccentricity.