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Optical Engineering

Complementary optimization method of freeform lens design for uniform illumination with extended light-emitting diode sources
Author(s): Te-Yuan Wang; Jin-Jia Chen; Kuang-Lung Huang; Chuen-Ching Wang
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Paper Abstract

A freeform lens design method based on energy mapping and complementary optimization approaches is proposed to achieve uniform illumination with extended light-emitting diode (LED) sources. This method is primarily derived from a simple source–a target energy mapping approach, while a complementary illuminance on the target plane is introduced to optimize the primary axisymmetric lens so that the profile of the lens can be reformed to produce uniform illumination when applying an extended LED source. By using this optimization method, the illuminance uniformity and optical efficiency of the lens can be improved, respectively, from 0.56 to 0.85 and from 92.4% to 94.3% for an LED light source with chip diameter of 8.9 mm, while the aspect ratio of the lens clear aperture to the source diameter is only 3.8.

Paper Details

Date Published: 10 September 2015
PDF: 8 pages
Opt. Eng. 54(9) 095102 doi: 10.1117/1.OE.54.9.095102
Published in: Optical Engineering Volume 54, Issue 9
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)


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