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. 15, 1998
Filed:
Apr. 29, 1997
Katsuya Yagi, Hachioji, JP;
Konica Corporation, Tokyo, JP;
Abstract
An optical pickup apparatus includes: a laser source for emitting a laser light beam; a converging optical system for converging the light beam emitted from the laser source onto an information recording surface through a transparent substrate of an optical information recording medium, the converging optical system including a lens surface so that a spherical aberration is discontinuous in a third numerical aperture (NA3) on a side of the optical information recording medium, and the third numerical aperture (NA3) is satisfied the following condition,
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile