Light-emitting unit for a projector lamp

Abstract

The invention relates to a lighting unit () for a headlight, in particular a motor vehicle headlight, comprising a plurality of light sources (), a light guide unit () having a plurality of light guides () and a downstream projection lens (), wherein each light guide () has a light decoupling face (), and wherein each light source () couples light precisely into a light guide () associated therewith, and wherein adjacent light guides () are separated from one another by partition walls (). In accordance with the invention, at least one diaphragm element () is arranged between the light guide unit () and the projection lens (), which diaphragm element () has apertures () separated from one another by aperture partition walls (), wherein the diaphragm element () is arranged in such a way that an aperture () is arranged to the front of each light decoupling face (), and wherein the apertures () correspond substantially in terms of shape and size to the light decoupling faces () associated therewith, and wherein, on the faces () of the at least one diaphragm element () facing away from the light guide unit (), at least part of the aperture partition walls () has a smaller wall thickness (b) than the partition walls () of the light guide unit () associated with the respective aperture partition walls ().