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Comparison of Dual Focus Collector Schemes for Fiber Systems
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English
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.
Authors
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.Also In
References
- Cassarly W.J. Davenport J.M. Hansler R.L. ‘Uniform Light Delivery Systems,’ SAE Paper No. 960490
- Davenport J.M. Hansler R.L. ‘Discharge for Automotive Lighting,’ SAE Congress Mar 1988
- Davenport J.M. Hansler R.L. Springer R.H. ‘Starting the Instant Light Metal Halide Lamp’ IESNA Annual Conference Technical Papers 457 472 1989
- Jost K. ‘High Intensity Discharge Headlamps,’ Automotive Engineering 38 42 Nov. 1995
- Tiesler-Wittig H Bindels J. T. ‘Discharge Light Source - The basis for fibre optics automotive lighting.’ SAE Feb. 1995
- Cassarly W.J. Davenport J.M. Hansler R.L. ‘Distributed Lighting Systems: Uniform Light Delivery,’ SAE Paper 950904 Feb. 1995
- Welford W.T. Winston R. ‘High Collection Nonimaging Optics,’ Academic Press, Inc. San Diego 1989