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:
Apr. 18, 1978
Filed:
Oct. 14, 1976
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350-68 ; 350182 ; 358199 ;
Abstract
A prism anamorphic optical system is disposed in the path of deflected beam from a rotatable polygonal mirror or a galvano-mirror. This prism anamorphic optical system includes at least two prisms, so that different amounts of displacement of the deflected beam at each angle of deflection and in a direction perpendicular to the direction of deflection caused by the first of the prisms are corrected by the second and subsequent prisms, as viewed from the incidence side. Thus, a straight scanning line may be obtained.