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:
Aug. 18, 1998
Filed:
Jan. 24, 1996
Hisatoshi Baba, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an optical information recording/reproducing apparatus provided with an actuator for integrally moving a mirror and an objective lens in the focusing direction, there are provided a device for receiving a light beam reflected by an information medium thereby detecting a tracking error signal indicating deviation of the light beam from an information track, a device for measuring an offset value utilizing the tracking error signal, and a device for correcting the offset contained in the tracking error signal. The offset correcting device corrects the offset at the tracking servo operation, based on the offset value measured by the offset measuring device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile