Substrate illuminating device, especially metal strand with coating, with light of defined wavelength has radiator that can be stimulated to emit light with funnel- or wedge-shaped protrusions

摘要

The device has a radiator (3) that can be stimulated to emit light and that has a surface (4) with a number of funnel-shaped or wedge-shaped protrusions (5). The funnel-shaped or wedge-shaped protrusions have an opening angle that is smaller than 45 degrees and preferably smaller than 30 degrees. They can have an angle between 10 and 30 degrees.