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Proceedings Paper

Rapid prototyping of reflectors for vehicle lighting using laser activated remote phosphor
Author(s): Roland Lachmayer; Gerolf Kloppenburg; Alexander G. Wolf
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Paper Abstract

Bright white light sources are of significant importance for automotive front lighting systems. Today’s upper class vehicles mainly use HID or LED as light source. As a further step in this development laser diode based systems offer high luminance, efficiency and allow the realization of new styling concepts and new dynamic lighting functions. These white laser diode systems can either be realized by mixing different spectral sources or by combining diodes with specific phosphors. Based on the approach of generating light using a laser and remote phosphor, lighting modules are manufactured. Four blue laser diodes (450 nm) are used to activate a phosphor coating and thus to achieve white light. A segmented paraboloid reflector generates the desired light distribution for an additional car headlamp. We use high speed milling and selective laser melting to build the reflector system for this lighting module. We compare the spectral reflection grade of these materials. Furthermore the generated modules are analyzed regarding their efficiency and light distribution. The use of Rapid Prototyping technologies allows an early validation of the chosen concept and is supposed to reduce cost and time in the product development process significantly. Therefor we discuss costs and times of the applied manufacturing technologies.

Paper Details

Date Published: 9 March 2015
PDF: 12 pages
Proc. SPIE 9383, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIX, 938305 (9 March 2015); doi: 10.1117/12.2078791
Show Author Affiliations
Roland Lachmayer, Leibniz Univ. Hannover (Germany)
Gerolf Kloppenburg, Leibniz Univ. Hannover (Germany)
Alexander G. Wolf, Leibniz Univ. Hannover (Germany)


Published in SPIE Proceedings Vol. 9383:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIX
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Martin Strassburg, Editor(s)

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