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. 16, 1993
Filed:
Oct. 17, 1990
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359196 ; 359206 ; 359215 ;
Abstract
A scanning optical apparatus has a light source for emitting a light beam, and a deflector such as rotatable polygonal mirror having a plurality of mirror surfaces for deflecting the light beam emitted from the light source. Each mirror surface of the rotatable polygonal mirror has a pair of reflecting surfaces inclined toward the center axis of rotation of the polygonal mirror and orthogonal to each other. A fixed reflecting mirror is arranged in opposed relationship with one of the pair of reflecting surfaces so that the light beam deflected by the deflector is reflected to be returned to the deflector again.