10 April 2005 Lightsources for small-etendue applications: a comparison of xenon and UHP lamps
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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.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ulrich Weichmann, Ulrich Weichmann, Jan Willem Cromwijk, Jan Willem Cromwijk, Gero Heusler, Gero Heusler, Uwe Mackens, Uwe Mackens, Holger Moench, Holger Moench, Jens Pollmann-Retsch, Jens Pollmann-Retsch, } "Lightsources for small-etendue applications: a comparison of xenon and UHP lamps", Proc. SPIE 5740, Projection Displays XI, (10 April 2005); doi: 10.1117/12.590172; https://doi.org/10.1117/12.590172

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