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Proceedings Paper

Freeform lens design using a complementary optimization method for uniform illumination with extended LED light sources
Author(s): Te-Yuan Wang; Jin-Jia Chen; Kuang-Lung Huang; Chuen-Ching Wang
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Paper Abstract

We propose a complementary optimization method to design a freeform lens for uniform illumination with extended LED sources. With this method, a primary freeform lens is first constructed based on a source-target energy mapping approach; then a complementary illuminance on the target plane is introduced to optimize the primary freeform lens so that it can produce uniform illumination with an extended COB LED. The computer simulation results show that the illuminance uniformity of the optimized lens can be improved nearby 30% as compared with that of the primary lens; meanwhile, the optical efficiency achieves above 94%.

Paper Details

Date Published: 5 November 2014
PDF: 7 pages
Proc. SPIE 9272, Optical Design and Testing VI, 927214 (5 November 2014); doi: 10.1117/12.2071178
Show Author Affiliations
Te-Yuan Wang, National Changhua Univ. of Education (Taiwan)
Jin-Jia Chen, National Changhua Univ. of Education (Taiwan)
Kuang-Lung Huang, MingDao Univ. (Taiwan)
Chuen-Ching Wang, Kao Yuan Univ. (Taiwan)


Published in SPIE Proceedings Vol. 9272:
Optical Design and Testing VI
Yongtian Wang; Chunlei Du; José Sasián; Kimio Tatsuno, Editor(s)

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