US Patent 7368706 Light scanning device

A light scanning device, including a light source including plural light emitting elements arranged linearly, a deflection section that deflects plural light beams emitted from the light source to scan a surface to be scanned, a photosensor that receives at least one of the plural light beams that are deflected by the deflection section, a signal generation section that generates a signal when a light energy amount received at the photosensor reaches a predetermined amount, and a control section that starts scanning of the surface to be scanned by each light beam after a predetermined amount of time passes from a point in time when the signal is generated by the signal generation section, the light receiving surface of the photosensor being inclined to receive light beams emitted from at least two light emitting elements among the plural light emitting elements, is provided.