I. Moreno, C.-Y. Tsai, D. Berm˜udez and C.-C. Sun, "Simple function for intensity distribution from LEDs," Proc. SPIE 6670, 66700H-66700H-7 (2007).
Lumileds, "LUXEON Power LEDs," http://www.lumileds.com/products/luxeon/.
L. Svilainis and V. Dumbrava, "LED Far Field Pattern Approximation Performance Study," in Prof. Int. Conf. on Information Technology Interfaces (2007), pp. 645-649.
Lumileds, "LUXEON LED Radiation Patterns:Light Distribution Patterns," http://www.lumileds.com/technology/radiationpatterns.cfm
R. Otte, L. P. de Jong, and A. H. M. van Roermund, Low-Power Wireless Infrared Communications (Kluwer Academic Publishers, 1999), Chap. 3.
Lumileds, "LUXEON for Flashlight Applications," http://www.lumileds.com/pdfs/DR02.PDF.
Faren Srl, "FHS Lens Series," http://www.fraen.com/pdf/FHS Lens Series Datasheet.pdf.
Marubeni, "Fully Sealable APOLLO Lens for LUXEON," http://www.led-spot.com/data/APOLLO.pdf.
H. Yang, J. W. M. Bergmans, T. C. W. Schenk, J. P. M. G. Linnartz and R. Rietman, "Uniform Illumination Rendering using an Array of LEDs: A Signal Processing Perspective," to appear in IEEE Trans. Signal Processing, 2009.
P. R. Boyce, Human Factors in Lighting, Second Edition (Taylar & Francis Inc, 2003).