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:
Oct. 13, 1981
Filed:
Oct. 26, 1978
Applicant:
Inventors:
Muneharu Sugiura, Tokyo, JP;
Seiji Sagara, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V / ; G03B / ;
U.S. Cl.
CPC ...
362217 ; 362297 ; 362301 ; 355 67 ;
Abstract
A slit illuminating device having a plurality of linear surface mirrors, each partially surrounding a light source, whereby the illumination and the distribution of illumination at the slit section can be maintained uniform and stable, even when changes occur in the position of the light source.