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Proceedings Article

LED illumination control and color mixing with Engineered Diffusers

[+] Author Affiliations
Tasso R. M. Sales, Stephen H. Chakmakjian, Donald J. Schertler, G. Michael Morris

RPC Photonics, Inc. (United States)

Proc. SPIE 5530, Fourth International Conference on Solid State Lighting, 133 (October 20, 2004); doi:10.1117/12.566081
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From Conference Volume 5530

  • Fourth International Conference on Solid State Lighting
  • Ian T. Ferguson; Nadarajah Narendran; Steven P. DenBaars; John C. Carrano
  • Denver, CO | August 02, 2004

abstract

We propose and demonstrate the use of Engineered Diffusers for control and distribution of LED light for general lighting applications. These diffusers are based on refractive microstructures and enable the efficient use of energy by controlling light propagation and directing it to specific regions of space. The microstructures are generally microlens-based arrays with each microlens elements individually designed to meet the desired scatter properties. In addition to light control, Engineered Diffusers can be used for RGB mixing to produce white light with variable color temperature, depending on the RGB content of the source. A single Engineered Diffuser component can be used for efficient color mixing and illumination control. We also discuss the fabrication of Engineered Diffusers by means of a single-point laserwriting method with capability to manufacture the deep refractive structures needed for LED beam shaping.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Tasso R. M. Sales ; Stephen H. Chakmakjian ; Donald J. Schertler and G. Michael Morris
"LED illumination control and color mixing with Engineered Diffusers", Proc. SPIE 5530, Fourth International Conference on Solid State Lighting, 133 (October 20, 2004); doi:10.1117/12.566081; http://dx.doi.org/10.1117/12.566081


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