Patent ID: 8095025
Filing Date: 2012-01-10
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: an image forming unit configured to form a plurality of toner images on an image carrier of a plurality of image carriers; an optical detector configured to detect reflection light from a toner image of the plurality of toner images, and dedicated to detect infrared rays and near-infrared rays; and a controller configured to perform sensitivity correction control for the optical detector using a detection value detected by the optical detector, wherein a gradation pattern is comprised of a plurality of toner patches formed in the image forming unit with an image forming condition to have different adhesive amounts, and is formed of at least two colors, and detection values detected by the optical detector are used for a predetermined control, at least one toner patch of the plurality of toner patches includes only one color, and a length of the gradation pattern having the plurality of toner patches is shorter than a pitch length between the image carriers.