Patent ID: 7629992
Filing Date: 2009-12-08
Classification: G02B,H04N

Abstract:
1. An image forming apparatus comprising: a plurality of image bearing members, a plurality of light sources each emitting a laser beam to form an electrostatic latent image on respective ones of image bearing members, a plurality of rotating polygon mirrors, each of which reflects plural ones of the laser beams for scanning, the laser beams being entered to the rotating polygon mirrors with different angles to a plane perpendicular to a rotating axis of the rotating polygon mirror; and a plurality of developing devices which respectively develop the latent images formed on the image bearing members with a plurality of differently colored toners respectively, the color toners including at least two color toners which have a same hue and a different brightness each other, wherein the laser beams corresponding to the color toners having the same hue are scanned with common rotating polygon mirror, wherein, in at least one rotating polygon mirror in the plurality of rotating polygon mirrors, the brightness of toner developing the electrostatic latent image formed with a laser beam entering to the rotating polygon mirror with a first angle to the plane is higher than the brightness of toner developing the electrostatic latent image formed with a laser beam entering to the rotating polygon mirror with a second angle to the plane, and wherein the second angle is smaller than the first angle.