| 摘要 |
<p>PURPOSE:To improve the density of picture element of a written image by guiding luminous flux with a tapered fiber array and reducing the image of a light source array or a shutter array so that an image is formed. CONSTITUTION:Each luminous flux outgone from each light source of an LED array 21 is made incident on the tapered fiber array 1 provided on the LED array 21 and becomes a reduced spot line on the outgoing end thereof to expose a photosensitive body 2. In such a case, the photosensitive body 2 is disposed in contact with the outgoing end of the tapered fiber array or with a extremely small gap and moreover, it performs a relative motion with the LED array 21 in a direction shown by an arrow A. Then, it must be excellent in friction- proof and its surface must be quite smooth. Now, a light source and a driving circuit are packaged in the LED array 21 and the light emitting state of each light source is controlled according to signals transmitted with a signal line 22. Thus, the light spot line where the density of picture element is improved more than in an incidence end can be obtained in the outgoing end of the tapered fiber array 1.</p> |
