Patent ID: 8264510

Claim:
An image forming apparatus comprising: an image carrier having a curvature in a first direction; and an exposure head including a first light emitting element that emits a light having a wavelength λ 11 and a light having a wavelength λ 12 , a first optical system that converges a light emitted from the first light emitting element onto the image carrier, a second light emitting element, and a second optical system that converges a light emitted from the second light emitting element onto the image carrier, wherein a position at which the first optical system converges light and a position at which the second optical system converges the light are different from each other with respect to the first direction, wherein the first optical system focuses the light having the wavelength λ 11 at an imaging position P 11 and focuses the light having the wavelength λ 12 at an imaging position P 12 , the imaging position P 11 and the imaging position P 12 being different from each other with respect to an optical axis direction of the first optical system, and wherein a distance Δ 1 between the imaging position P 11 and the imaging position P 12 with respect to the optical axis direction of the first optical system is equal to or larger than a distance d between an intersection point I 1 and an intersection point I 2 with respect to the optical axis direction of the first optical system, the intersection point I 1 being a point at which the optical axis of the first optical system intersects the image carrier, the intersection point I 2 being a point at which an optical axis of the second optical system intersects the image carrier, wherein the distance d is a positive number.