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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 13 — Jun. 22, 2009
  • pp: 10612–10622

Efficient LED light distribution cavities using low loss, angle-selective interference transflectors

John A. Wheatley, Gilles J. Benoit, James E. Anderson, Rolf W. Biernath, David G. Freier, Thomas R. Hoffend, C. David Hoyle, Tao T. Liu, Jenna D. Lu, Michael A. Meis, Vadim V. Savvateev, Craig R. Schardt, Matthew E. Sousa, Michael F. Weber, and Timothy J. Nevitt  »View Author Affiliations


Optics Express, Vol. 17, Issue 13, pp. 10612-10622 (2009)
http://dx.doi.org/10.1364/OE.17.010612


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Abstract

Recent advances in solid state light source efficiency and luminance present the technical challenge of distributing light from very small point sources to large areas, with area distribution ratios having orders of magnitude greater than previously addressed. Broad adoption of LEDs in lighting and liquid crystal displays is in part contingent on addressing this fundamental light distribution issue. Here we present new materials based on giant birefringent nanotechnology which address these deficiencies allowing us to guide light in air via a novel light distribution system. Resulting from controlled in-plane and out-of-plane x,y,z refractive indices of adjacent layers, these multilayer interference films possess both angle selective and polarization selective reflectance. The angle selectivity can be tuned in both azimuth and polar angle, relieving a key constraint of prior materials. Our work has been done on a physically large scale enabling demonstration of large light management systems of industrial and practical relevance.

© 2009 OSA

OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(260.5430) Physical optics : Polarization
(220.2945) Optical design and fabrication : Illumination design
(310.4165) Thin films : Multilayer design

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: February 24, 2009
Revised Manuscript: May 29, 2009
Manuscript Accepted: June 5, 2009
Published: June 10, 2009

Citation
John A. Wheatley, Gilles J. Benoit, James E. Anderson, Rolf W. Biernath, David G. Freier, Thomas R. Hoffend, C. David Hoyle, Tao T. Liu, Jenna D. Lu, Michael A. Meis, Vadim V. Savvateev, Craig R. Schardt, Matthew E. Sousa, Michael F. Weber, and Timothy J. Nevitt, "Efficient LED light distribution cavities using low loss, angle-selective interference transflectors," Opt. Express 17, 10612-10622 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-13-10612


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References

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