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:
Aug. 06, 2013
Filed:
Oct. 30, 2009
Applicant:
Daisuke Morikawa, Kashiwa, JP;
Inventor:
Daisuke Morikawa, Kashiwa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 1/46 (2006.01); H04N 1/40 (2006.01); H04N 1/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical filter is provided on photoelectric conversion elements for monochrome reading. Each of a reflecting optical system and the optical filter has an end portion and a central portion in a predetermined direction. The optical filter suppresses light at a peak wavelength of a light source such that a difference between a sensitivity of optical path via the end portion of the reflecting optical system and the optical filter and a sensitivity of optical path via the central portion of the reflecting optical system and the optical filter fall within a range of 5% at the peak wavelength of light source.