Patent ID: 6639616
Filing Date: 2003-10-28
Classification: H04N

Abstract:
An image forming apparatus comprising:a movable image bearing member; a light source; a rotatable reflective polyhedron for reflecting light from said light source and performing light scanning of said image bearing member, wherein a plurality of light scannings are performed for a plurality of colors, respectively, in accordance with the following modes: a first mode for forming an image on said image bearing member at a first speed; and a second mode for forming an image on said image bearing member at a second speed, which is 1/(n+1) of the first speed, wherein at the time of performing the second mode, in each of said plurality of light scannings, when it is assumed that the number of reflective surfaces of said reflective polyhedron is m, m/(n+1) is not an integer (provided that m is an integer of three or more and n is a natural number.).