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http://dx.doi.org/10.6109/jkiice.2017.21.1.157

The design and the analysis of a LED illumination lens using the overlapped model  

You, Ilhyun (Department of Information Communication Technology, Semyung University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.21, no.1, 2017 , pp. 157-164 More about this Journal
Abstract
In this research, the overlapped illumination model was used for designing a freeform LED lens with a uniform illuminance distribution on its illuminating plane, and their performances and tolerances were compared. And, the illuminations on a illumination plane was measures for change with average illuminance and illuminance uniformity. As a result of the tolerance analysis about z-axis direction change, thickness change in lens and tilt change of light emission and characteristic change in LED source, overlapped model and divergent illumination model are similar to the performance about Z-axis direction change of light emission in LED source. but the uniformity illumination value in this overlapped model is more remarkably value than it in divergent illumination model about thickness change in LED lens. Also, even though the lens based on a divergent illumination model showed good performance compare to the lens based on an overlapped illumination model, the latter was less the deviation to variation of LED beam radiation ability.
Keywords
Overlapped illumination model; Freeform Lens; LED lens; Uniform illuminance; half angle;
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Times Cited By KSCI : 1  (Citation Analysis)
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