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. 30, 2014
Filed:
May. 16, 2011
Applicant:
Takeyoshi Saiga, Utsunomiya, JP;
Inventor:
Takeyoshi Saiga, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 13/08 (2006.01); H04N 1/10 (2006.01); G02B 13/18 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 13/08 (2013.01); H04N 1/1048 (2013.01); G02B 13/18 (2013.01); H04N 1/1043 (2013.01); H04N 1/1056 (2013.01); H04N 1/1013 (2013.01); G02B 27/0031 (2013.01); H04N 1/1017 (2013.01);
Abstract
Provided is an image reading lens to be used for reading image information of an original. The image reading lens includes an anamorphic lens having at least one anamorphic surface with an aspherical shape which is rotationally asymmetric about an optical axis. The anamorphic lens has a non-arc shape in each of a main scanning section and a sub scanning section. The at least one anamorphic surface has a positive optical power in a main scanning direction on the optical axis, and a non-arc amount of the sub scanning section continuously changes with an increase in distance from the optical axis in the main scanning direction.