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:
Feb. 04, 1997
Filed:
Apr. 04, 1995
Applicant:
Inventors:
Koichi Tezuka, Kawasaki, JP;
Kyoko Miyabe, Kawasaki, JP;
Assignee:
Fujitsu Limited, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369112 ; 369109 ; 369103 ; 369105 ; 369 4441 ;
Abstract
An optical data recording/reproducing device, wherein the number of reflection in an optical path of coherent light formed between a coherent light source and an optical disk is twice or a larger even number of times, and the array direction of the coherent light source and photodetectors is substantially parallel to the face of the optical disk, resulting in a smaller size in the direction corresponding to the thickness of the optical disk.