| 摘要 |
<p>PURPOSE:To eliminate the need for recording to recording paper when image formation is adjusted by installing a projection plate where the light of an LED array passed through a short-focus lens array is projected and moving the LED array and short-focus lens array in optical-axis directions according to the size of an image of the light projected on the projection plate. CONSTITUTION:The projection plate 28 is installed at distance equal to the distance l from the center of a center axis 31 to the surface of a photosensitive drum 2 from the center, and the LED array 10 emits light, which is projected on the projecting plate 28. The LED array 10 and short-focus lens array 11 are moved by adjusting the depth of a screw 33 so that the size of the image of light projected on the projection plate 28 is minimum, thereby adjusting image formation on the projection plate finely. Namely, the distance from the center of the center axis 31 to the projection plate 28 is equal to the distance to the surface of the photosensitive drum 2, so the image formation position on the photosensitive drum is considered to be adjusted finely. Consequently, a recording device need not be operated for recording to recording paper every time a position adjustment is made.</p> |
