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:
May. 06, 2003
Filed:
Dec. 13, 2000
Applicant:
Inventors:
Nobuhide Aoyama, Kawasaki, JP;
Shin-ya Hasegawa, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract
There is disclosed a compact optical information storage apparatus in which noise attributed to wobbling or the like is reduced and high-density recording is possible. An optical device comprises a reflective surface including a main portion for reflecting a signal light reflected by a separation surface in a predetermined direction, and a mask portion having an optical property different from the optical property of the main portion.