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Optical Engineering

Uniform illumination of distant targets using a spherical light-emitting diode array
Author(s): Ivan Moreno; Jesus Muñoz; Rumen Ivanov
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Paper Abstract

An array of light-emitting diodes (LEDs) assembled upon a spherical surface can produce a wider angle distribution of light than a typical array (i.e., an array assembled by mounting LEDs into a flat surface). Arranging each single LED into an optimal placement, the uniformity of the illumination of a target can be improved. We derive approximate formulas and equations for the optimum LED-to-LED angular spacing of several spherical arrangements for uniform far-field irradiance. These design conditions are compact and simple tools that incorporate an explicit dependence on the half-intensity viewing angle (half width half maximum angle) of LEDs.

Paper Details

Date Published: 1 March 2007
PDF: 7 pages
Opt. Eng. 46(3) 033001 doi: 10.1117/1.2715562
Published in: Optical Engineering Volume 46, Issue 3
Show Author Affiliations
Ivan Moreno, Univ. Autónoma de Zacatecas (Mexico)
Jesus Muñoz, Univ. de Guadalajara (Mexico)
Rumen Ivanov, Univ. Autónoma de Zacatecas (Mexico)


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