1 May 2014 Lamp system with a single second-lens newly designed by using the least square method for 4 LEDs
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It is common for many companies to use multiple LEDs to enhance the brightness of a LED lamp and, in general, four LEDs are used in the LED lamp systems. Moreover, the second-lens must be used to obtain a straight uniform illumination from LED lights. Where four LEDs are used, four second-lenses are also assembled conventionally and those four units of second-lenses are manufactured from a single mold and assembled together with the LEDs. However, this study introduces a new method of using the Least Square Method to get a uniform illumination with the divergence angle of 40 degrees with a new single injection molded lens. Thanks to this optical design with a single lens, the assembling process of LED lamp system was simplified by eliminating the complicated assembly procedure. Also, the uniformity of illumination of this newly designed lamp system was less than 14.1%.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jae Heung Jo, Jae Heung Jo, Jae Myung Ryu, Jae Myung Ryu, Chun Gang Hong, Chun Gang Hong, "Lamp system with a single second-lens newly designed by using the least square method for 4 LEDs", Proc. SPIE 9131, Optical Modelling and Design III, 91311F (1 May 2014); doi: 10.1117/12.2051642; https://doi.org/10.1117/12.2051642


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