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:
Jan. 18, 2000
Filed:
Nov. 14, 1997
Michitaka Setani, Kawasaki, JP;
Emiko Ueno, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A color image reading apparatus includes a light receiving device having a plurality of line sensors disposed on a surface of a common substrate, an imaging optical system for forming an image of an object, a blazed diffraction grating, disposed in an optical path between the imaging optical system and the light receiving device, for color-separating a beam from the object into a plurality of color beams, a first optical element provided near a position where the plurality of color beams are focused in a sub scanning cross section by the imaging optical system and a second optical element provided in an optical path between the first optical element and the light receiving device. The plurality of color beams color-separated by the blazed diffraction grating are focused on the light receiving device through the first optical element and the second optical element.