Abstract: An arrangement for directional radiation of light in symbol-indicator systems which are to be effective over fairly large distances, with the symbols being formed by dots of a dot matrix which receive light from respective light conductor bundles, particularly for utilization as additional indicators in the railroad signalling field, in which each matrix dot is provided with a lens arrangement comprising two horizontally adjacent lenses having their plane surfaces facing the illuminating light conductors with the two lenses being cooperatively disposed to reproduce two horizontally adjacent partially superimposed light sources in the plane of observation.

Abstract: A device for the transmission of light by optical conductors which are arranged in a plurality of bundles that extend between a display surface and a source of illumination and which are gathered together into a strand of conductors at either the display surface or source of illumination characterized by a coupling device, which may be separate or integral with the strand of gathered conductors, disposed at the strand to obtain substantially equal distribution of the intensity of light leaving the conductors.