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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 5 — Mar. 1, 2012
  • pp: 839–841

Image-like illumination with LED arrays: design

Ivan Moreno  »View Author Affiliations


Optics Letters, Vol. 37, Issue 5, pp. 839-841 (2012)
http://dx.doi.org/10.1364/OL.37.000839


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Abstract

An array of spatially distributed light-emitting diodes (LEDs) can produce an illumination pattern that approaches an image by individually modulating each LED. In this letter, I analyze the first-order design of such systems in order to achieve the best match between the illumination distribution and a desired image. In particular, simple formulas are given for the optimal number of LEDs, working distance, array size, and LED beam pattern. The analysis developed here may be applied to the design of LED systems such as architecture lighting, energy-efficient lighting, backlight local dimming for displays, and structured illumination microscopy with micro-LED arrays.

© 2012 Optical Society of America

OCIS Codes
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(150.2950) Machine vision : Illumination
(230.3670) Optical devices : Light-emitting diodes
(330.5000) Vision, color, and visual optics : Vision - patterns and recognition
(220.2945) Optical design and fabrication : Illumination design

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: September 7, 2011
Revised Manuscript: December 13, 2011
Manuscript Accepted: December 13, 2011
Published: February 22, 2012

Citation
Ivan Moreno, "Image-like illumination with LED arrays: design," Opt. Lett. 37, 839-841 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-5-839


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References

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