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首页> 外文会议>Conference on Modeling and Characterization of Light Sources, Jul 8-9, 2002, Seattle, USA >Efficient Dual Paraboloid Reflector Illumination System for Projection Display
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Efficient Dual Paraboloid Reflector Illumination System for Projection Display

机译：投影显示的高效双抛物面反射镜照明系统

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With the increased interests in mass production of LCOS and DLP~(TM) microdisplay-based projectors and televisions, the image panel sizes become smaller and the pixel counts become higher. While the image panels are being miniaturized, the screen sizes required by the users are increasing. The two factors together require an increasing amount of light passing through the small image panels, thus increase the brightness requirement of the light sources. Most lamp developers approach the issue by reducing the arc length of the lamp, thus increasing the brightness of the arc. But, traditional reflectors used to collimate or focus light from the arc degrade the brightness of the arc. In this paper, a novel approach is used to increase the brightness of an illumination system by preserving the brightness of the arc using a dual paraboloid reflector system, thus relaxes the requirement of have a shorter arc gap lamp. To illuminate these smaller image panels, a patented dual paraboloid reflector system has been developed to collect and focus light from an arc lamp onto the image panel without loss of brightness. This optical platform provides the control and etendue efficiency that has been missing in standard illumination systems. The dual paraboloid reflector system consists of two parabolic reflectors placed symmetrically facing each other. The first parabolic reflector collects and collimates light into a parallel beam. The second parabolic reflector intercepts the parallel beam and focuses the light into a rectangular tapered light pipe (TLP) resulting in a unity magnification, i.e. 1:1 imaging, with conserved brightness. The TLP transforms the focused light into an output with the needed area, shape, and numerical aperture. It also acts as a homogenizer so that the intensity profile at the output surface is uniform and eventually provides a uniform intensity profile at the screen. The reflection of light twice in the dual paraboloid reflector system provides high IR and UV rejection ratios, resulting in less degradation of the optical components. ASAP models of the system and experimental results will be presented. The advantages of this system when applied to polarization recovery systems, polarization recycling systems, and color recycling systems will be discussed.
机译：随着对基于LCOS和DLPTM微型显示的投影仪和电视的大量生产的兴趣日益增加，图像面板的尺寸越来越小，像素数也越来越多。当图像面板被小型化时，用户所需的屏幕尺寸正在增加。这两个因素一起需要增加穿过小图像面板的光量，因此增加了光源的亮度要求。大多数灯开发商通过减小灯的电弧长度来解决此问题，从而增加了电弧的亮度。但是，用于准直或聚焦来自电弧的光的传统反射器降低了电弧的亮度。在本文中，一种新颖的方法被用于通过使用双抛物面反射器系统来保持电弧的亮度来增加照明系统的亮度，从而放宽了对具有更短的弧隙灯的要求。为了照亮这些较小的图像面板，已经开发了专利的双抛物面反射器系统，以将来自弧光灯的光线收集并聚焦到图像面板上而不会损失亮度。该光学平台可提供标准照明系统所缺少的控制和集光率效率。双抛物面反射镜系统由两个对称面对面放置的抛物面反射镜组成。第一抛物面反射器将光收集并准直成平行光束。第二个抛物线反射器截取平行光束并将光聚焦到矩形锥形导光管（TLP）中，从而实现单位放大倍率，即1：1成像，并且亮度保持不变。 TLP将聚焦的光转换为具有所需面积，形状和数值孔径的输出。它还用作均化器，以使输出表面的强度分布均匀，并最终在屏幕上提供均匀的强度分布。在双抛物面反射器系统中两次反射光可提供高的IR和UV抑制比，从而减少了光学组件的退化。将介绍该系统的ASAP模型和实验结果。将讨论该系统应用于偏振恢复系统，偏振回收系统和颜色回收系统的优点。

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