Freeform LED lens for uniform illumination | Zendy

Yi Ding | Zendy; Xü Liu | Zendy; Zhenrong Zheng | Zendy; Peifu Gu | Zendy

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Freeform LED lens for uniform illumination

Author(s) -

Yi Ding,

Xü Liu,

Zhenrong Zheng,

Peifu Gu

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.012958

Subject(s) - optics , lens (geology) , computation , nonimaging optics , computer science , led lamp , set (abstract data type) , physics , algorithm , programming language

Light flux from LED must be redistributed to meet the needs of lighting in most cases, a new method is proposed for its secondary optic design. Based on refractive equation and energy conservation, a set of first-order partial differential equations which represent the characters of LED source and desired illumination were presented. The freeform lens was constructed by solving these equations numerically. The numerical results showed that we can get a freeform lens for the illumination of uniformity near to 90%, with considerable high computation speed. This method can shorten the designing time of the freeform lens with high accepted tolerance.

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