Patent ID: 7035299

Claim:
An image forming apparatus comprising: laser light sources which emit a plurality of light beams having different wavelengths; a reshaping section for reshaping each of the plurality of light beams; a deflector provided with a reflecting mirror which reflects incident light beam, the deflector deflecting the light beam by rotating the reflecting mirror around a rotation axis provided substantially on a surface of the reflecting mirror in a predetermined direction; a reflection type optical system having at least one reflecting surface which reflects the deflected light beam deflected by the deflector and guiding the light beam reflected by the reflecting surface to an image forming medium; and a control section which, based on image data, supplies a control signal for modulating the plurality of light beams to the laser light sources wherein the at least one of the reflecting surface of the reflection type optical system is formed so as to have arcsine characteristics as a property of reflecting the incident light beam.