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. 08, 1995
Filed:
Oct. 11, 1994
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 4418 ; 369 4419 ; 369 4417 ; 369 4414 ; 369112 ; 359814 ; 359823 ;
Abstract
An optical head unit includes a motor having a stator and a rotor which is mounted rotatably on the stator, at least the rotor having a generally disk-shaped (i.e., circular or polygonal) configuration, and an optical system mounted on a common, main surface of the rotor. The optical system includes a light emitting part for emitting a light beam, a focus actuator, an objective lens provided on the focus actuator, and a light beam receiving part. The light beam emitted from the light emitting part is output via the objective lens, and light received via the objective lens is received by the light receiving part.