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:
Dec. 24, 1991
Filed:
Mar. 15, 1991
Katsuhiko Takeda, Okazaki, JP;
Hitoshi Kageyama, Okazaki, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A slit illumination system provided in an image forming apparatus of slit exposure type for slit-illumination of an original placed on a document glass table in the image forming apparatus. The slit illumination system is provided with a light source including an elongated exposure lamp to illuminate the original at a slit-illuminated position on the document glass table, a main reflecting mirror portion composed of first and second reflecting mirrors, and an auxiliary reflecting mirror portion composed of third and fourth reflecting mirrors. The first, second, third and fourth reflecting mirrors are respectively shaped to follow a part of first, second, third and fourth ellipsoids which are different in curvature from each other.