| 摘要 |
<p>PURPOSE:To enhance the use efficiency of the energy of writing light and to increase printing speed by providing an optical system allowing the writing light transmitted through a photosensitive sheet to be again incident to the photosensitive sheet. CONSTITUTION:A mirror 6A as a light reflecting member is provided on the surface of a holding stand 6 for a photosensitive sheet constituted of a base sheet and a photosensitive sheet and the light transmitted through the photosensitive layer is reflected to again irradiate the photosensitive layer. The photosensitive layer is subjected to optical writing two times by the writing light 7 incident to the photosensitive layer through a SELFOC lens array and the reflected light 8 from the holding stand 6 and, even when the photosensitive sheet is moved at almost twice speed, the almost same optical density is obtained.</p> |
