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. 28, 2004
Filed:
Feb. 06, 2003
Ryuji Nogami, Ibaraki, JP;
Mitsugu Hanabusa, Ibaraki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an image reading apparatus for reading a transparent original, the object of the present invention is to obtain a high-quality read image from which dust or scratch is removed. In order to achieve this object, in the image reading apparatus for reading the transparent original, a transparent original illumination unit has the first and second surfaces on the same side. On the first surface, at least one light source for emitting light in at least a visible range is arranged. On the second surface, at least one light source including a plurality of infrared light sources arrayed in series to emit light in an infrared range is arranged. The first and second surfaces are arranged at positions different from an effective light-emitting region, and includes a light guide plate and reflecting sheet for substantially uniformly emitting incident light from the same side portion to an entire surface.