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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Stephen A. Burns
  • Vol. 23, Iss. 9 — Sep. 1, 2006
  • pp: 2295–2298

Light-emitting diode illumination design with a condensing sphere

Wanli Chi and Nicholas George  »View Author Affiliations

JOSA A, Vol. 23, Issue 9, pp. 2295-2298 (2006)

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An illumination system is described that comprises a glass or plastic sphere, an embedded light-emitting diode (LED) source, and a reflecting or scattering mirror. The rays from the LED are either refracted in the forward direction or totally internally reflected by the sphere. The mirror breaks the total internal reflection and thus sends the rays in the forward direction. The illumination pattern and efficiency of the system are analyzed. This system is extremely compact and efficient and is a good starting point for a complex illumination system design.

© 2006 Optical Society of America

OCIS Codes
(080.0080) Geometric optics : Geometric optics
(080.2740) Geometric optics : Geometric optical design
(150.2950) Machine vision : Illumination
(220.2740) Optical design and fabrication : Geometric optical design
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Optical Design and Fabrication

Original Manuscript: October 28, 2005
Revised Manuscript: February 8, 2006
Manuscript Accepted: February 10, 2006

Wanli Chi and Nicholas George, "Light-emitting diode illumination design with a condensing sphere," J. Opt. Soc. Am. A 23, 2295-2298 (2006)

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