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:
Feb. 16, 2010
Filed:
Jul. 24, 2007
Daisuke Ichii, Kanagawa, JP;
Yoshinori Hayashi, Kanagawa, JP;
Takeshi Ueda, Tokyo, JP;
Kohji Sakai, Tokyo, JP;
Kenichiro Saisho, Kanagawa, JP;
Daisuke Ichii, Kanagawa, JP;
Yoshinori Hayashi, Kanagawa, JP;
Takeshi Ueda, Tokyo, JP;
Kohji Sakai, Tokyo, JP;
Kenichiro Saisho, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical scanning device includes a light source having light emitting points for emitting light beams, a coupling optical element that couples the light beams, a deflecting unit that deflects and scans the light beams, and a scanning optical system that focus the light beams to form an image. The optical scanning device satisfies the following condition: F tan(θ/2)+A<D/0.7 where A is the maximum distance between the light emitting points and an optical axis of the coupling optical element, θ is a divergence angle (full-width half-maximum) of the light beams, F is a focal length of. the coupling optical element, and D is an effective radius of the coupling optical element.