Patent ID: 7903135

Claim:
An optical scanning device which scans a scanned surface by a plurality of light beams in a main-scanning direction; comprising: a vertical cavity surface emitting lasers (VCSELs) light source having a plurality of light-emitting portions which emit the light beams, the light-emitting portions being two-dimensionally arranged in a plane parallel to the main-scanning direction and a sub-scanning direction orthogonal to the main-scanning direction via arrangement intervals in the main-scanning direction and the sub-scanning direction, wherein a plurality of the arrangement intervals in the main-scanning direction are unequal to each other and a plurality of the arrangement intervals in the sub-scanning direction are unequal to each other; a deflector which scans the light beams in the main-scanning direction; and a scanning optical system which images the scanned light beams onto the scanned surface.