Comparison of Dual Focus Collector Schemes for Fiber Systems

Paper #:
  • 970254

Published:
  • 1997-02-24
Citation:
Cassarly, W., Davenport, T., Hansler, R., and Allen, G., "Comparison of Dual Focus Collector Schemes for Fiber Systems," SAE Technical Paper 970254, 1997, https://doi.org/10.4271/970254.
Pages:
12
Abstract:
The development of efficient, multi-output High Intensity Discharge (HID) light sources is important for driving fiber systems in automotive applications, in particular for headlamps. Such systems must collect a large fraction of the light from the HID source while efficiently coupling the light into large core light pipes.An earlier paper [1] showed how multifocus optical systems can efficiently split the light evenly between separate output ports. Multifocus systems were shown to be more efficient than a mixing rod approach, especially for the case of two ports. In the case of dual output systems, many more cases need to be considered. To facilitate the investigation, a state-of-the-art optical analysis/design program was employed to demonstrate the tradeoffs between six different dual focus geometries. A novel dual ellipse approach is presented.
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