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:
May. 08, 2007
Filed:
Oct. 04, 2000
Kohji Sakai, Tokyo, JP;
Magane Aoki, Kanagawa, JP;
Seizo Suzuki, Kanagawa, JP;
Hiromichi Atsuumi, Kanagawa, JP;
Kohji Sakai, Tokyo, JP;
Magane Aoki, Kanagawa, JP;
Seizo Suzuki, Kanagawa, JP;
Hiromichi Atsuumi, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A scanning optical system condensing a beam deflected by an optical deflector so as to form a beam spot on a surface to be scanned, comprises two lenses. A lens on the side of optical deflector has a negative refracting power in sub-scanning direction. A lens on the side of surface to be scanned has a positive refracting power in the sub-scanning direction. At least one lens surface of the lens surfaces of the two lenses is such that a shape in a sub-scanning section thereof is a non-arc shape.