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. 23, 2013
Filed:
Aug. 12, 2010
Applicants:
Ken Tanimura, Osaka, JP;
Takeyoshi Saiga, Utsunomiya, JP;
Inventors:
Ken Tanimura, Osaka, JP;
Takeyoshi Saiga, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 45/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for injection molding an imaging optical element to be used in an optical scanning apparatus for guiding a light ray in a main scanning direction and a sub-scanning direction. In the imaging optical element, the light ray passes through at least one optical functional surface and does not pass over the meridional line including the optical axis. The imaging optical element is injection-molded through an initial molding step and other various measurement and correction steps.