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Proceedings Paper

Optimization for LED arrays to achieve uniform near-field illumination
Author(s): Hu Zhang; Yi Li; Wei Zhang; Yize Huang; Haifang Wang; Xiaojing Yu; Huiqun Zhu; Sheng Zhou; Ruoxi Sun; Yuming Zhang
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Paper Abstract

For achieving uniform near-field illumination, this paper is based on the theory that each LED is non-perfect Lambertian emitter, whose irradiance distribution obeys the power law. Using the theory of sparrow's criterion, two methods to realizing near-field uniform irradiance of LED arrays are discussed by taking into account of the production process of LED array, a conclusion can be made that adjusting the curve to achieve uniform near-field irradiance is impossible but adjusting the space could. The structural characteristics of three typical LED arrays are analyzed. The equations of the relationship between illumination and space, as well as the optimal arrangements of the LED arrays are given. The nearfield optical properties for LED arrays with the optimal arrangement structure are simulated by MATLAB. By using a photometer we measure the irradiance intensity of the LED arrays, and make comparisons between experimental results and theoretical results, the result shows it works well.

Paper Details

Date Published: 7 October 2010
PDF: 6 pages
Proc. SPIE 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 76551X (7 October 2010); doi: 10.1117/12.865937
Show Author Affiliations
Hu Zhang, Univ. of Shanghai for Science and Technology (China)
Yi Li, Univ. of Shanghai for Science and Technology (China)
Shanghai Key Lab. of Modern Optical System (China)
Wei Zhang, Univ. of Shanghai for Science and Technology (China)
Yize Huang, Univ. of Shanghai for Science and Technology (China)
Haifang Wang, Univ. of Shanghai for Science and Technology (China)
Xiaojing Yu, Univ. of Shanghai for Science and Technology (China)
Huiqun Zhu, Univ. of Shanghai for Science and Technology (China)
Wuyi Univ. (China)
Sheng Zhou, Univ. of Shanghai for Science and Technology (China)
Ruoxi Sun, Univ. of Shanghai for Science and Technology (China)
Yuming Zhang, Univ. of Shanghai for Science and Technology (China)


Published in SPIE Proceedings Vol. 7655:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Yoshiharu Namba; David D. Walker; Shengyi Li, Editor(s)

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