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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 21, Iss. 13 — Jul. 1, 1982
  • pp: 2461–2464

Optical efficiency of LEDs with hemispherical lenses

Jaroslaw Jarominski  »View Author Affiliations


Applied Optics, Vol. 21, Issue 13, pp. 2461-2464 (1982)
http://dx.doi.org/10.1364/AO.21.002461


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Abstract

In this paper formulas are derived that describe the optical efficiency of an LED package consisting of a hemispherical lens placed on the cylinder. The dependence of this efficiency on the H/R ratio and the epoxy coefficient of refraction is calculated. In calculations it is assumed that the semiconductor chip, believed to be the point source of radiation, is mounted on the optical axis of the LED package, and the absorption of nonscattering epoxy is small. As an example, the optical efficiency of the LED with H/R = 2.5 and n = 1.5 is calculated: it is equal to 37.4%.

© 1982 Optical Society of America

History
Original Manuscript: August 21, 1981
Published: July 1, 1982

Citation
Jaroslaw Jarominski, "Optical efficiency of LEDs with hemispherical lenses," Appl. Opt. 21, 2461-2464 (1982)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-21-13-2461


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References

  1. A. M. Kontkiewicz, “Calculations of the Angular Characteristics of Light-Emitting Diodes,” Proceedings of ITE36 (1977) (in Polish).

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