Illumination device for photographic color apparatus

摘要

An illuminating device for a color printing apparatus having color filters insertable at varying amounts into the printing light beam has a light-conducting shaft and a variable aperture diaphragm both of which have substantially rectangular cross sections whereby the color content of the printing light beam is maintained substantially uniform. The light-conducting shaft has the form of a frustum of a square pyramid and the variable aperture of the diaphragm has a rectangular form. The light source has an ellipsoidal reflector, and the light beam emerging from the illuminating device is channeled through a light mixer.