| 摘要 |
<p>PURPOSE:To position a drum surface at a focusing point of lens array all the time by holding an integrally formed arrayed light source and lens array in movable form and providing a limiting roller to cause said roller to contact with the surface of a photosensitive element drum. CONSTITUTION:A lens array 3 with focusing light transmission elements arranged monodimensionally like a self-focusing lens is installed with clamping metals 9, 10 in such a way that each light emitting element of an arrayed light source 2 is located at the focusing point of the lens array 3. Each optical element of the arrayed light source 2 lights up to an image and an image is formed and exposed to light on the surface of a photosensitive element drum 1 by the lens array 3. At that time, the arrayed light source 2 and lens array 3 follow along the external circumference of the photosensitive element drum 1 by means of a limiting roller 17 in contact with the external circumference of the photosensitive element drum 1, so that the lens array 3 is always kept at constant distance from the surface of the photosensitive element drum 1 and subsequently, the image is optically exposed without any shift from the focusing point. The exposed portion of the photosensitive element drum 1 is discharged, thus forming a static latent image depending on the existence of an electric charge and visualizing the image with a toner in a following development block 5.</p> |
