
Proceedings Paper
Multi-segment freeform LED uniform lens with low reflective lossFormat | Member Price | Non-Member Price |
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Paper Abstract
The secondary optical lens of the light-emitting diode (LED) constructed with freeform surface plays more and more
important role in common illumination. The reflective loss at the freeform interfaces is discussed in this work. To restrict
the reflective loss of the rays with the large incident angle, the freeform surface design rule is proposed. In this rule, the
maximum deflexion angle of the refractive surface is 25° for a single freeform interface when choose PMMA to be the
lens material, and the total reflection surface is introduced to control the rays which cannot be dealt by the refractive
surfaces. The lens examples based on this rule are constructed by multi-segment freeform surfaces and the results show
that the reflective loss is controlled less than 10%.
Paper Details
Date Published: 5 November 2010
PDF: 6 pages
Proc. SPIE 7849, Optical Design and Testing IV, 784910 (5 November 2010); doi: 10.1117/12.869487
Published in SPIE Proceedings Vol. 7849:
Optical Design and Testing IV
Yongtian Wang; Julie Bentley; Chunlei Du; Kimio Tatsuno; Hendrik P. Urbach, Editor(s)
PDF: 6 pages
Proc. SPIE 7849, Optical Design and Testing IV, 784910 (5 November 2010); doi: 10.1117/12.869487
Show Author Affiliations
Liangping Xia, Institute of Optics and Electronics (China)
Shaoyun Yin, Institute of Optics and Electronics (China)
Shaoyun Yin, Institute of Optics and Electronics (China)
Xiaochun Dong, Institute of Optics and Electronics (China)
Chunlei Du, Institute of Optics and Electronics (China)
Chunlei Du, Institute of Optics and Electronics (China)
Published in SPIE Proceedings Vol. 7849:
Optical Design and Testing IV
Yongtian Wang; Julie Bentley; Chunlei Du; Kimio Tatsuno; Hendrik P. Urbach, Editor(s)
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