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Proceedings Paper

Optical design of LED-based automotive tail lamps
Author(s): André Domhardt; Udo Rohlfing; Karsten Klinger; Karl Manz; Dieter Kooß; Uli Lemmer
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Paper Abstract

The application of ultra bright monochromatic and white High-Power-LEDs in the range of automotive lighting systems is now state of the art. These LEDs offer new possibilities in optical design and engineering within different fields of automotive lighting, e.g., tail lamps, signal lamps, headlamps and interior lighting. This contribution describes the process of the optical design of an automotive LED tail lamp based on a practical example. We will elaborate the principal geometric approach, the radiometric conditions and the optical design by using standard and advanced mathematical optimization methods. Special attention will be paid to the following topics: efficient light coupling from the LED into the optical device, adaptation of the illuminance and optimization with respect to the requirements from SAE/ECE regulations. It will be shown that the development of LED-lamps requires the complex interaction of several factors. The challenge for the optical designer is to fulfill the technical demands while also considering the appearance of the final product desired by the customer. Further design specifications emerge from the electrical and thermal layout of the lamp.

Paper Details

Date Published: 18 September 2007
PDF: 10 pages
Proc. SPIE 6670, Nonimaging Optics and Efficient Illumination Systems IV, 66700L (18 September 2007); doi: 10.1117/12.732827
Show Author Affiliations
André Domhardt, Univ. of Karlsruhe (Germany)
Udo Rohlfing, Univ. of Applied Sciences Darmstadt (Germany)
Karsten Klinger, Univ. of Karlsruhe (Germany)
Karl Manz, Univ. of Karlsruhe (Germany)
Dieter Kooß, Univ. of Karlsruhe (Germany)
Uli Lemmer, Univ. of Karlsruhe (Germany)


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

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