Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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LED Lens for Rectangular Beam with Small Divergence Angles

  • Liu, Dianhong (Ordnance Engineering Department, Naval University of Engineering) ;
  • Zhang, Xiaohui (Ordnance Engineering Department, Naval University of Engineering) ;
  • Zhang, Shuang (Ordnance Engineering Department, Naval University of Engineering)
  • Received : 2016.11.04
  • Accepted : 2016.11.21
  • Published : 2016.12.25
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Abstract

We have designed a new TIR(Total Internal Reflection) structure for generating an LED lens which can produce a rectangular beam with small divergence angle in two perpendicular directions for an optical guidance system. The lens can control the divergence angle in the horizontal direction to be a small value of about $8^{\circ}$ with a $1mm{\times}1mm$ LED source, also in the vertical direction it can be about $7^{\circ}$, with optical collection efficiency higher than 0.83. After the lens is manufactured, the work demonstrates that the lens is suitable for an optical guidance system.

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