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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 36 — Dec. 20, 2012
  • pp: 8557–8562

Design of a compact modified total internal reflection lens for high angular color uniformity

Shuiming Li, Fei Chen, Kai Wang, Shuang Zhao, Zhili Zhao, and Sheng Liu  »View Author Affiliations


Applied Optics, Vol. 51, Issue 36, pp. 8557-8562 (2012)
http://dx.doi.org/10.1364/AO.51.008557


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Abstract

Total internal reflection (TIR) lenses are optical components that are used to collimate the light or to generate a desired uniform illumination. However, most TIR designs do not pay attention to color uniformity, an increasingly important issue for the quality of lighting, and have a considerable dimension, which also limits their applications. In this study, we proposed an effective design principle of color mixing, and a phosphor-converted white LED module integrated with a compact modified free form TIR component was presented and optimized to achieve compact size and high angular color uniformity (ACU). Optimization results indicated that modified LED packages could achieve a smaller size in vertical height (0.52) within the same horizontal radius, compared with LEDs integrated with classic TIR lenses. Meanwhile, the enhancement of ACU with an optimum appropriate divergence half angle (65°) reached as high as 84% in terms of normalized standard deviation of yellow–blue ratio from 0.888 to 0.429.

© 2012 Optical Society of America

OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(230.3670) Optical devices : Light-emitting diodes
(330.1720) Vision, color, and visual optics : Color vision

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: August 27, 2012
Revised Manuscript: November 16, 2012
Manuscript Accepted: November 17, 2012
Published: December 13, 2012

Virtual Issues
Vol. 8, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Shuiming Li, Fei Chen, Kai Wang, Shuang Zhao, Zhili Zhao, and Sheng Liu, "Design of a compact modified total internal reflection lens for high angular color uniformity," Appl. Opt. 51, 8557-8562 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-36-8557

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