| 摘要 |
In the light path of a photographic enlarger, a supplementary light source is arranged in such a way that an image thereof is formed by the condenser in the focal plane of the imaging lens but outside the range covered by the latter. If the original to be printed has scratches, these deflect at least a part of the light, which reaches them from the supplementary light source into the lens. As a result, that proportion of the actual printing light supplied by the printing light source which is deflected past the lens by the scratches is at least partially compensated. The image of the scratches on the printing material is virtually invisible.
|
