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. 07, 2001
Filed:
Dec. 01, 1998
Nobuyuki Kanto, Kawasaki, JP;
Koichi Tezuka, Kawasaki, JP;
Haruhiko Izumi, Kawasaki, JP;
Satoshi Shimokawa, Kawasaki, JP;
Shingo Hamaguchi, Kawasaki, JP;
Akihiko Makita, Kawasaki, JP;
Kyoko Tadaki, Kawasaki, JP;
Kazushi Uno, Kawasaki, JP;
Goro Kawasaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical head unit used for an optical disk apparatus is provided. The optical head unit includes an object glass assembly for focusing a laser beam from a light source on an optical disk, an actuator movable at least in a focus control direction, a carriage for supporting the actuator and moving the actuator in a track control direction, and a slider which is attached to the carriage and capable of adjusting its posture in relation to a surface of the optical disk. The object glass assembly is provided with a plurality of lens units. Each lens unit includes at least one lens. One of the plural lens units is supported by the slider.