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Proceedings Paper

Lightsources for small-etendue applications: a comparison of xenon and UHP lamps
Author(s): Ulrich Weichmann; Jan Willem Cromwijk; Gero Heusler; Uwe Mackens; Holger Moench; Jens Pollmann-Retsch
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Paper Abstract

In terms of the Etendue, projection is a very demanding application for the light source. In order to reach sufficient brightness, the light from the lamp has to be collected into the small Etendue of nowadays' displays. This can only be achieved with lamps that provide a high luminance out of a short arc. For a long time now, Xenon-lamps are used as the light source for large-screen cinema projectors. While Xenon-lamps can offer the required high luminance, they suffer from a very low efficiency leading to the typical multi-kW power ratings of cinema projectors. Modern portable projectors show almost the same performance with much lower wattage UHP-lamps. Therefore, in applications with smaller screen sizes, UHP-lamps are nowadays most commonly used. In this article a comparison of these two different lamp technologies is given. The light-technical properties of these lamp types are compared and advantages as well as disadvantages of the lamps will be discussed for the case of projection.

Paper Details

Date Published: 10 April 2005
PDF: 14 pages
Proc. SPIE 5740, Projection Displays XI, (10 April 2005); doi: 10.1117/12.590172
Show Author Affiliations
Ulrich Weichmann, Philips Research Labs. (Germany)
Jan Willem Cromwijk, Philips Lighting N.V. (Belgium)
Gero Heusler, Philips Research Labs. (Germany)
Uwe Mackens, Philips Research Labs. (Germany)
Holger Moench, Philips Research Labs. (Germany)
Jens Pollmann-Retsch, Philips Research Labs. (Germany)


Published in SPIE Proceedings Vol. 5740:
Projection Displays XI
Ming H. Wu, Editor(s)

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