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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 4 — Feb. 1, 2007
  • pp: 522–526

Illumination system using LED sources for pocket-size projectors

Xing Zhao, Zhi-liang Fang, Ji-cheng Cui, Xin Zhang, and Guo-guang Mu  »View Author Affiliations

Applied Optics, Vol. 46, Issue 4, pp. 522-526 (2007)

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An illumination system using LED sources for pocket-size projectors is designed. Its color gamut is much larger than the sRGB standard. The maximum theoretical efficiency of this system is 29.98% by non-imaging theory-based calculations. To analyze the system model, 1.5 × 106 rays are traced by using the LightTools software. The total light flux that illuminates the digital micromirror device is 44 lm and the American National Standards Institute 13-point uniformity on the surface is 91.55%, 91.15 % with a system efficiency of 28.3%. The calculations are in good agreement with the simulation results. The illumination system can be used for personal pocket-size projectors providing a 15–20 in. (38–51 cm) color display with the brightness comparable with a laptop.

© 2007 Optical Society of America

OCIS Codes
(080.2740) Geometric optics : Geometric optical design
(120.2040) Instrumentation, measurement, and metrology : Displays
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(220.4830) Optical design and fabrication : Systems design
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Optical Design and Fabrication

Original Manuscript: June 12, 2006
Revised Manuscript: August 11, 2006
Manuscript Accepted: September 18, 2006

Xing Zhao, Zhi-liang Fang, Ji-cheng Cui, Xin Zhang, and Guo-guang Mu, "Illumination system using LED sources for pocket-size projectors," Appl. Opt. 46, 522-526 (2007)

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