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:
Nov. 26, 1991
Filed:
Dec. 11, 1990
Katsuya Yagi, Hachioji, JP;
Konica Corporation, Tokyo, JP;
Abstract
Disclosed is an optical pickup device for use in an optical disk unit, which comprises a moving optical system and a fixed optical system. The moving optical system has a focussing lens confronting a disk-shaped information-recording medium and moves linearly in the radial direction of the information-recording medium. On the fixed optical system are disposed a beam-deflecting lens as tracking means and a relay lens for conjugating the position of the principal point of this beam-deflecting lens with the position of the focal point on the beam-incident side of the object lens when the moving optical system is present at an intermediate position within the moving range of the moving optical system. In the optical pickup device having this structure, track offset can be diminished over the entire reproduction region, and since no tracking means is disposed in the moving optical system, high-speed excess can be easily performed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile