This paper describes the results of non-sequential ray-tracing simulations about light guides with prismatic structures. Main problem of light guides with prisms is the realization of uniform light output over the whole surface with high efficiency. To get the information about the light distribution and uniformity of innovative light guides without many expensive samples it is necessary to create realistic models for ray tracing simulation. With realistic simulation models the coupling from the reflector into the light guide and the splitting from one light guide arm into two arms was investigated by simulation and measurement. The effects of the beam splitter on the efficiency and uniformity of the system were of special interest because thereby the amount of glass fibers and therefore material costs can be reduced. The best results regarding efficiency and uniformity were reached by using two arms which are converging smoothly together under a very acute angle. By using H6W or H10W bulbs the loss of flux with these beam splitters is small enough to realize light guides for position lamps with only one glass fiber per light guide. But also closed shape light guides are possible with beam splitters.
Analysis of lightguides regarding uniform appearance and coupling efficiency
Analyse von Lichtleitern bezüglich des einheitlichen Erscheinungsbildes und der optischen Kopplungsleistung
2003
14 Seiten, 13 Bilder, 2 Tabellen, 1 Quelle
Aufsatz (Konferenz)
Englisch
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