Patent ID: 6999109

Claim:
A light beam scanning apparatus, in which light beams scanned from an image head form spots on a photosensitive drum to form an image, the image head comprising: light emitting means comprised of a plurality of light emitting sources arranged to be perpendicular to a rotation axis of the photosensitive drum to output multiple beams in response to video signals; and a lens system for allowing the multiple beams output from the light emitting means to form spots on a surface of the photosensitive drum in a linear shape along a vertical direction of the surface thereof, wherein a focus of light beams having passed through the lens system is formed at a central axis of the photosensitive drum when viewed in a sub-scanning direction, thus enabling spots of the light beams to be vertically formed on the surface of the photosensitive drum in a linear shape when viewed in a main scanning direction.