Patent ID: 7728861

Claim:
An image forming apparatus comprising: an image bearing member which has a photosensitive layer; a light source which emits a laser beam; an optical component which transmits the laser beam emitted from the light source; a rotary polygon mirror for deflecting and scanning on a surface of the image bearing member with the laser beam which is transmitted through the optical component; reflecting means provided in a light path from the light source to the image bearing member and reflecting the laser beam emitted from the light source, wherein the reflecting means has a plurality of movable reflecting members on a reflecting surface; adjusting means for adjusting a position of the plurality of reflecting members for adjusting the size of the laser beam to irradiate the surface of the image bearing member; developing means for developing with a toner an electrostatic latent image formed on the image bearing member as the laser beam irradiates the surface of the image bearing member; transferring means for transferring a toner image developed with the toner to a recording material; and fixing means for fixing the toner image transferred on the recording material, wherein, when the temperature of the optical component rises, the reflecting members are moved to form a concave plane on the entire reflecting surface of the reflecting means.