Luminaire having a polygonal light emission window and a rectilinear prism structure

摘要

The light has a non-triangular or rectangular housing and light output surface, at least one hollow light conductor with a hollow volume (12) into which light from at least one source (22) is radiated and a coupler (16) of transparent material with one or more boundary surfaces between two media with different refractive indices and a refractive structure preventing light output above a threshold angle to an output surface normal.