| 摘要 |
An image forming apparatus includes a plurality of developing units configured to develop latent images formed on a plurality of photosensitive members by a exposure units; an image carrier, on which the developed images formed on the plurality of photosensitive members are transferred; a sensor configured to irradiate the image carrier with light, and detect an amount of reflected light; a patch detection unit configured to detect a position of a patch image, formed on the image carrier, based on the amount of reflected light detected by the sensor, wherein the patch image has a first region and a second region formed on the same photosensitive member, the second region is formed to be adjacent to the first region, and a density of the second region is lower than that of the first region. |
