| 摘要 |
PURPOSE:To form a desired pattern on a recording medium by installing plural light sources on the recording medium and providing a means interrupting an original exposing light beam corresponding to an irradiation area. CONSTITUTION:An original lighting lamp 14 moves together with a moving optical system 45, and an arrow B shows a light path. Plural fine LED arrays 701a of a blank exposing unit (erasure means) 23 are disposed in an array at high density, for instance, 4dot/mm, along the spindle of a photosensitive drum 1. Thereon a selfoc lens array is disposed which image-forms the rays of light of the LED array 701 on a photosensitive body. Plural comparatively large LED arrays 702a are disposed at 2.5mm pitch along the spindle of the photosensitive drum 1. A slit device 705 is installed on the moving optical system 45. |
