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:
Jan. 19, 1988
Filed:
Jan. 31, 1985
Hiroshi Kokado, Tokyo, JP;
Abstract
An optical data reproducing device including an illuminating system for respectively, simultaneously illuminating at least two separate tracks of an optical disk with at least two light beams; a photo-electric conversion device for respectively converting the at least two light beams reflected from the tracks into at least two electrical signals; and processing circuitry for processing the at least two electrical signals. The processing circuitry may include a switch for switching from one track to another to execute a trick jump play. This circuitry may also simultaneously read the track outputs. One or more diffraction gratings which may be perpendicularly oriented with respect to each other establish the beams projected on the tracks.