| 摘要 |
In an illuminating system for color enlargement or copying, three color filters of maximum density and a shutter may be introduced into the light beam in a continuous motion. The direction of travel of the filters is normal to the direction of travel of the shutter. To avoid a change in the color composition of the copying light when only the shutters are adjusted, the effective shape of the shutter introduced into the light beam is varied dependent upon the depth of insertion of the shutter into the light beam. For this purpose, the shutter may comprise two parts: a shutter strip and auxiliary shutter strip, the position of which relative to the corresponding shutter strip is different depending on the depth of insertion.
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