| 摘要 |
PURPOSE:To correct properly the amount of light irradiated to a photoreceptor, by intercepting the optical path partially by a correcting plate in accordance with plural kinds of copying magnification. CONSTITUTION:A lens 32 is held by a holding material 54, and the holding material 54 is fixed to a moving material 55 as one body. A guide bar 56 extending in the breadthwise direction of a machine body is fixed onto a partition plate 23 in the machine body and is inserted to a guide hole 57 of a moving table 55. Consequently, the moving table 55, the holding material 54, and the lens 32 are freely movable along the guide bar 56. A connecting piece 58 is provided fixedly to the moving table 55, and a halfway position of a wire 59 is fixed to this connecting piece 58. The wire 59 is driven in the lengthwise direction to display the driving table 55, the holding material 54, and the lens 32; and at a reduction copying time, the lens 32 is displaced in the direction of an arrow 60 to shorten the length of the optical path between the lens 32 and a photoreceptor 28. |
