28 May 2004 Etendue dependent optimization for coupling with dual paraboloid reflectors for projection display
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Abstract
A dual paraboloid reflector system conserves the source brightness by producing a real image of the arc on the target space. Traditional elliptical and parabolic reflector tends to degrade the brightness of the arc due to the angular dependence of the magnification such that the image at the target space is the superposition of multiple images of the arc with varying degree of magnifications. In this paper, we present steps for optimizing a projection illumination system consisting of the dual paraboloid reflectors. The effects of various parameters including reflector sizes, scattering and angular extents were evaluated using ray-tracing model. The results of the calculations are compared with experimental measurement.
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Kenneth K. Li, Kenneth K. Li, Seiji Inatsugu, Seiji Inatsugu, Sheldon S. Sillyman, Sheldon S. Sillyman, } "Etendue dependent optimization for coupling with dual paraboloid reflectors for projection display", Proc. SPIE 5289, Liquid Crystal Materials, Devices, and Applications X and Projection Displays X, (28 May 2004); doi: 10.1117/12.541160; https://doi.org/10.1117/12.541160
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