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Proceedings Paper

High-efficiency reflector optics for LED automotive forward lighting
Author(s): Jianghong Jiao; Ben Wang
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Paper Abstract

Although white LED lumen output and luminance have both substantially been increased in the last few years, multiple LEDs are still needed, at present time, to meet automotive forward lighting such as low beam headlamp photometric specifications. Use of multiple LEDs in combination with optics is often constrained by the lamp size. With the goal of minimizing the number of LEDs used in an automotive forward lighting design, further studies have been conducted to optimize reflector optics for the fog lamp and headlamp low beam applications. The studies included different types of LEDs by means of lumen output and effective emitting area. In addition, the system étendue and its optical transformations have been taken into considerations in the studies.

Paper Details

Date Published: 18 September 2007
PDF: 10 pages
Proc. SPIE 6670, Nonimaging Optics and Efficient Illumination Systems IV, 66700M (18 September 2007); doi: 10.1117/12.730524
Show Author Affiliations
Jianghong Jiao, Osram Opto Semiconductors Inc. (United States)
Ben Wang, North American Lighting, Inc. (United States)


Published in SPIE Proceedings Vol. 6670:
Nonimaging Optics and Efficient Illumination Systems IV
Roland Winston; R. John Koshel, Editor(s)

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