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. 04, 2005
Filed:
Dec. 16, 2002
Nobuaki Ono, Kanagawa-ken, JP;
Tomohiro Nakajima, Tokyo, JP;
Akihisa Itabashi, Tokyo, JP;
Kenichi Takanashi, Chiba-ken, JP;
Tomoya Ohsugi, Tokyo, JP;
Nobuaki Ono, Kanagawa-ken, JP;
Tomohiro Nakajima, Tokyo, JP;
Akihisa Itabashi, Tokyo, JP;
Kenichi Takanashi, Chiba-ken, JP;
Tomoya Ohsugi, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical scanning apparatus includes light sources, an aperture having, and coupling lenses. Numbers of the light sources and the coupling lenses are equal to each other and the apparatus satisfies an inequality 12.7 <(D×β×m×xdpi)/(2×NA) <38.1 and an equation β=(β−β)/(n−1), wherein D represents a width of the slit of the aperture, βrepresents a beam open angle, mo represents a total lateral magnification ratio, dpi represents a number of dots per inch, NA represents a numerical aperture, βrepresents a positive open angle, βrepresents a negative open angle, and n represents the number. Further, an image forming apparatus using this optical scanning apparatus and an image forming method are provided.