| 摘要 |
<p>A graphic arts contact printer (10) which comprises a vacuum table (14) for supporting a photosensitive film (18) and an original (20), containing an image to be reproduced, in superposed relationship. A light source (32) provides an elongated beam of photoactive light for exposing the film through the original. A light transport is provided for moving the light transversely of the length of the beam over the vacuum table surface over the superposed film and original whereby the superposed film and original are scanned by the light to expose the film through the original. Means is provided which is associated with the light transport for applying a transparent cover sheet (36) over the superposed film and original as the light is moved over the film and original. Further means (34) carried by the light transport is provided for collimating the light, with the collimating means being disposed between the light and the cover sheet.</p> |
