| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical sensor capable of preventing attachment of toner and floating dust during detection operation of density of an image formed on an image carrier and positions of ends of the image, and collecting the removed toner and floating dust; and an image forming apparatus.SOLUTION: A dust-proof member 22 covers a periphery of a sensor unit 21 that detects an image pattern detecting density of an image and positions of ends of the image, and has a surface arranged opposite to an intermediate transfer belt 5, as a transparent transmission part 22a. |
