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. 30, 1994
Filed:
Apr. 24, 1992
Applicant:
Inventors:
Hiroaki Katoh, Kawasaki, JP;
Toshimasa Miyazaki, Kawasaki, JP;
Tamotsu Takahashi, Tokyo, JP;
Takeshi Ishii, Tokyo, JP;
Yoshihiro Oyama, Tokyo, JP;
Tatsuo Sasaki, Tokyo, JP;
Assignees:
Fujitsu Ltd., Kawasaki, JP;
Copal Co. Ltd, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235467 ; 362373 ; 361694 ; 359216 ;
Abstract
An optical scanner includes a light source including a laser diode for emitting a laser beam, and an optical deflector such as a rotary polygonal mirror for deflecting the laser beam to thereby produce a scanning laser beam. The laser diode is protected from being overheated by arranging the light source in a heat insulating chamber or by cooling the light source with the air flow circulated by the rotation of the rotary polygonal mirror in cooperation with a curved guide plate.