EXPLOSION-PROOF LIGHTING UNIT WITH CAST-IN OPTICAL SYSTEM

摘要

The invention relates to an explosion-proof lighting unit (20) with one or more light-emitting diodes (30). A printed circuit board (34), on which the light-emitting diodes (30) are electrically and mechanically fixed, is arranged in a well (22). An optical element (40) is arranged on the printed circuit board (34) around each light-emitting diode (30). The light-emitting diode (30) is located in a receiving area of the optical element (40). The light emitted by the light-emitting diode (30) enters the optical element (40) at a beam inlet surface (44) adjoining the receiving area and exits at a beam outlet surface (46). A gap (45) is present between the beam inlet surface (44) and the light-emitting diode (30). The printed circuit board (34) and the optical elements (40) paired with the light-emitting diodes (30) are cast-in. The beam outlet surface (46) is not covered by the cast body (49).