Abstract
We present a simple freeform lens design method for an application to LED collimating illumination. The method is derived from a basic geometric-optics analysis and construction approach. By using this method, a highly collimating lens with LED chip size of 1.0 mm×1.0 mm and optical simulation efficiency of 86.5% under a view angle of ± 5 deg is constructed. To verify the practical performance of the lens, a prototype of the collimator lens is also made, and an optical efficiency of 90.3% with a beam angle of 4.75 deg is measured.
| Original language | English |
|---|---|
| Pages (from-to) | 10984-10995 |
| Number of pages | 12 |
| Journal | Optics Express |
| Volume | 20 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2012 May 7 |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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Cite this
Chen, J. J., Wang, T. Y., Huang, K. L., Liu, T. S., Tsai, M. D., & Lin, C. T. (2012). Freeform lens design for LED collimating illumination. Optics Express, 20(10), 10984-10995. https://doi.org/10.1364/OE.20.010984