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Proceedings Paper

Lamp system with a single second-lens newly designed by using the least square method for 4 LEDs
Author(s): Jae Heung Jo; Jae Myung Ryu; Chun Gang Hong
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Paper Abstract

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%.

Paper Details

Date Published: 1 May 2014
PDF: 7 pages
Proc. SPIE 9131, Optical Modelling and Design III, 91311F (1 May 2014); doi: 10.1117/12.2051642
Show Author Affiliations
Jae Heung Jo, Hannam Univ. (Korea, Republic of)
Jae Myung Ryu, Kumoh National Institute of Technology (Korea, Republic of)
Chun Gang Hong, Kang Dong Tech Co., Ltd. (Korea, Republic of)


Published in SPIE Proceedings Vol. 9131:
Optical Modelling and Design III
Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editor(s)

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