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:
Sep. 21, 1982
Filed:
Jul. 09, 1981
Susumu Seto, Odawara, JP;
Mitsuhiro Tokuhara, Chigasaki, JP;
Yukio Takemura, Kawasaki, JP;
Yu Yamada, Kokubunji, JP;
Takeshi Kuwayama, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A scanning illuminator suitable for use in high speed copying machines is adapted to compensate the distribution of loss in light quantity with respect to an imaging lens due to the so-called Cos.sup.4 law in the scanning direction and includes fixed sources of light. The scanning illuminator is characterized by illuminating systems disposed symmetrically relative to an original supporting area, each illuminating system being adapted for illuminating the opposite end areas of an original by a portion of light beam from the fixed source of light adjacent one end of the original, especially the light beam portion emitted and bled backward of the light source, the illuminating system having at least one rotating or translating scan mirror for scanning the illuminating light beam.