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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers

ISO Journal TitleJ Korean Inst. IIIum. Electr. Install. Eng.
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Title Secondary Optical Lens Design for Beam Divergence of Light Emitting Diode)
Authors Jong-Tae Kim
DOI http://dx.doi.org/10.5207/JIEIE.2017.31.8.067
Page pp.67-71
ISSN 1225-1135
Keywords LED ; Illumination Design ; Lens Design ; Divergence Source ; Secondary Optical Lens
Abstract As Fields using LED(Light Emitting Diode) as semiconductor light source is rapidly increasing, many studies and developments have been undertaken in various areas to control the beam divergence or luminous intensity distribution characteristics in LED light sources. In this study, we designed a secondary optical lens for beam shaping of LED light source, using the refraction method. The designed secondary optical lens can be combined with LED light source and can be used as a light source for illumination or diffusion. For uniformity of 85%, it showed a beam divergence angle of 154° and a FWHM of 92.7mm(@ 30mm)