The design of a reading light system with RGB white-light LED by Fresnel lens and evolutionary algorithms

Wen-Gong Chen; Chii-Maw Uang

doi:10.1117/12.579300

22 October 2004 The design of a reading light system with RGB white-light LED by Fresnel lens and evolutionary algorithms

Wen-Gong Chen, Chii-Maw Uang

Author Affiliations +

Proceedings Volume 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X; (2004) https://doi.org/10.1117/12.579300
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

This paper presents the design of a reading light system consisted of multiple R, G, and B white light LEDs with Fresnel lens located before the light source. First, we use a general Fresnel lens and a Genetic Algorithm (phaseΙ) to search the best arrangement of multiple LEDs, then use another Genetic Algorithm (phaseΠ) to the result obtained before to get a better Fresnel lens of width-varied grooves. Experimental results show that the special arrangement of LEDs and the special structure of Fresnel lens make the reading light system more efficient in illuminance than the reading light system of no Fresnel lens.

Citation Download Citation

Wen-Gong Chen and Chii-Maw Uang "The design of a reading light system with RGB white-light LED by Fresnel lens and evolutionary algorithms", Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); https://doi.org/10.1117/12.579300

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