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:
Nov. 25, 1986
Filed:
Sep. 12, 1985
Applicant:
Inventors:
Mitsuhiro Tokuhara, Chigasaki, JP;
Hiroshi Ogawa, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
355 71 ; 350450 ; 355 50 ;
Abstract
A slit exposure projection device having a projection optical system and/or an aperture stop designed such that the pupil of the projection optical system in the longitudinal direction of the slit is large relative to the pupil in the lateral direction of the slit.