| 摘要 |
Apparatus for selectively inserting into and withdrawing color absorption filters from the light beam paths or photographic color recorders, e.g., of the aerial image and enlarger types. Includes a housing defining a pluralsection chamber and having opposed and spaced sidewalls with the latter in an operational section of the chamber having substantially aligned windows closed by suitable optical transparencies through which the light beam path of a photographic color recorder may extend upon suitable beam-intercepting support of this housing in a certain orientation. A plurality of substantially parallel, planar color absorption filters, having substantially uniform indices of refraction, are arranged in three different groups within a storage section of the chamber that is offset from the windowed operational section. Guide means define substantially parallel paths of planar motion of the filters between the chamber storage and operational sections, and also support them in substantially parallel positions intervening the windows. Means are provided which seal at least the sides and bottoms of the chamber storage and operational sections in a liquid-tight manner, and a body of transparent colorless liquid which has an index of refraction substantially equal to that of the filters is located in these chamber sections in a quantity which maintains immersion therein of the filters in their positions of storage and operation and movements therebetween.
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