INTERNALLY COOLED FLUORESCENT DEVICE AND REFLECTOR LAMP ARRANGEMENT COMPRISING SAID FLUORESCENT DEVICE

摘要

The invention relates to a dual fluorescent wheel (1) comprising two disk-shaped carrier elements (2, 3) which are interconnected by wing-type cooling ribs (8). When the dual fluorescent wheel (1) rotates, air flows in through an axial opening (6) in one of the carrier elements (2), flows radially through the interspace between the carrier elements (2, 3) or the wing-type cooling ribs (8) and flows out at the edge. This flow of air improves the dissipation of heat which is produced when an excitation laser irradiates the annular fluorescent strips located on the two exterior faces.