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. 14, 2012
Filed:
Jan. 02, 2009
Masako Yoshii, Kanagawa, JP;
Seizo Suzuki, Chiba, JP;
Yoshinori Hayashi, Kanagawa, JP;
Daisuke Ichii, Kanagawa, JP;
Masako Yoshii, Kanagawa, JP;
Seizo Suzuki, Chiba, JP;
Yoshinori Hayashi, Kanagawa, JP;
Daisuke Ichii, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
In an optical scanning device, when pixel density is taken to be n, number of the light beams is taken to be b, and number of the deflection surfaces of a deflecting unit is taken to be p, a spatial frequency S denoted by S=1/(1/(25.4/n×b×p) is within a range of a spatial frequency characteristic for a visual perception system of a high relative luminous efficiency. When spacing between ends in a sub-scanning direction of a scanning line formed by one scan by the deflection unit is taken to be L, and spacing between all progressive scanning lines at the surface to be scanned is taken to be L, then L>(k−1)×Lis satisfied, where k is a total number of light emitting points of a light source.