20 August 2005 Dual paraboloid reflector system configurations for increasing brightness of an arc lamp
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Abstract
The arc in an optical system is usually the brightest point in the system. For many applications including projection displays, the brightness of the arc plays an important role in determining the brightness of the projected image at the screen and the size of the imaging panel that can be used. Brightness cannot be increase outside the arc, but had been increased in many applications by spherical retro-reflectors, in which the light collected by the retro-reflector is focused back into the arc itself, thus increasing the brightness of the arc. Using the unique property, unit magnification, of the Dual Paraboloid Reflector (DPR) system, the arc can be manipulated in many different ways and the arc size is preserved after multiple reflections using DPR. The more times the image of the arc passes through the arc itself, the brighter the arc is. This increase in brightness allows a longer arc, lower brightness lamp to be used in higher brightness applications. In this paper, several configurations will be described where the brightness of the arc can be increased. Ray tracing results will also be presented.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kenneth Li, Seiji Inatsugu, "Dual paraboloid reflector system configurations for increasing brightness of an arc lamp", Proc. SPIE 5942, Nonimaging Optics and Efficient Illumination Systems II, 594201 (20 August 2005); doi: 10.1117/12.618246; https://doi.org/10.1117/12.618246
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