Multiple-lamp illumination system for projection displays

Dennis F. Vanderwerf

doi:10.1117/12.237018

29 March 1996 Multiple-lamp illumination system for projection displays

Dennis F. Vanderwerf

Proceedings Volume 2650, Projection Displays II; (1996) https://doi.org/10.1117/12.237018
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

This paper describes a diascopic projection system that efficiently combines and integrates the output from multiple light sources. The images of these light sources are superposed at a common focus in the projection lens, resulting in a projected screen brightness considerably greater than that produced by a single lamp of equivalent wattage. The illumination system consists of a series of collimating and converging plastic Fresnel lenses, and a linear beam- integrating micro-prismatic element. Glass anamorphic condenser optics are also used. The optics can be cascaded, and the design requirements of a four-lamp system is described. The experimental results from a laboratory developed overhead projection system using dual tungsten-halogen lamps is discussed.

Citation Download Citation

Dennis F. Vanderwerf "Multiple-lamp illumination system for projection displays", Proc. SPIE 2650, Projection Displays II, (29 March 1996); https://doi.org/10.1117/12.237018

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