Patent ID: 7911669

Claim:
An optical scanning device, comprising: a condensing optical system configured to collect a light beam emitted from light source means; deflecting means configured to scanningly deflect the light beam collected by said condensing optical system; and an imaging optical system configured to image the light beam scanningly deflected by said deflecting means, on a surface to be scanned; wherein said deflecting means has a deflecting surface configured to reciprocally move within a main-scan sectional plane and to scanningly deflect the light beam from said condensing optical system, wherein said deflecting surface of said deflecting means is supported by a supporting means only at one side in the sub-scan direction, and wherein the light beam collected by said condensing optical system is collected to a region of said deflecting surface at a side of a central line of said deflecting surface in the sub-scan direction which side is opposite to the side where said deflecting surface is supported by said supporting means.