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. 21, 1979
Filed:
Jan. 11, 1977
Kenjiro Goto, Urawa, JP;
Mansei Kogyo Kabushiki Kaisha, Saitama, JP;
Abstract
An optical control system for information read out of video and/or audio information optically recorded in a track on the surface of a disc-shaped information medium, wherein a lightbeam is focused into a spot of predetermined transverse dimension at the locus of impingement thereof with the plane of the track and selectively deflected transversely along an edge of the track. Deviations of the light spot from the edge of the track is detected and corrected by means of feedback servo-system to maintain the light spot properly situated on the track edge. The servo-system also corrects for focus deviations in the predetermined transverse dimension of the light beam.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile