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:
Mar. 24, 1992
Filed:
May. 21, 1990
Applicant:
Inventor:
Mitsuhiro Tokuhara, Chigasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355218 ; 355243 ; 355 55 ;
Abstract
An image-forming apparatus capable of changing the size of the image formed on an electronic photosensitive medium is disclosed. The image-forming apparatus is provided with an auxiliary projection optical system in addition to a main projection optical system which is able to project an image on the photosensitive medium with variable magnification. The auxiliary projection optical system is provided to illuminate exclusively the non-image forming area of the photosensitive medium. The size of the image of the light source of the auxiliary projection optical system formed on the photosensitive medium is controllable as desired.