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:
Apr. 05, 2011
Filed:
Jan. 22, 2009
Hibiki Tatsuno, Kawasaki, JP;
Yasuo Sakurai, Yokohama, JP;
Kiichiro Nishina, Yokohama, JP;
Nobuaki Ono, Yokohama, JP;
Masahiro Itoh, Sagamihara, JP;
Hibiki Tatsuno, Kawasaki, JP;
Yasuo Sakurai, Yokohama, JP;
Kiichiro Nishina, Yokohama, JP;
Nobuaki Ono, Yokohama, JP;
Masahiro Itoh, Sagamihara, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image reading apparatus includes a plurality of light sources to illuminate a document; an illumination optical system to guide light to a reading target area having a length and a width; a document illuminating device to illuminate the entire document; an image forming optical system to form an image from light reflected from the document; and a sensor provided in an image forming section of the image forming optical system to read the image of the document. The illumination optical system includes a concentration section to control light diffusion, and a reflection section. The reflection section includes at least two integrally configured reflection surfaces, in which a sine value of an angle of reflected light from at least one reflection surface is positive, while a sine value of an angle of reflected light from the rest of at least one reflection surface is negative.