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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 19 — Jul. 1, 2005
  • pp: 4000–4003

Optical characterization of ultrabright LEDs

Juan Manuel Benavides and Robert H. Webb  »View Author Affiliations


Applied Optics, Vol. 44, Issue 19, pp. 4000-4003 (2005)
http://dx.doi.org/10.1364/AO.44.004000


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Abstract

Ultrabright light emitting diodes (LEDs) are a new light source for visual psychophysics and microscopy. The new LEDs are intended primarily for room and exterior illumination, and the manufacturers’ specifications are adequate for that. However, we use them as light sources in situations where a more complete characterization may be useful. For one set of LEDs we have measured the radiometric intensity and its distribution in space and wavelength, and we have tested for interactions of these variables and their dependence on driver configuration. We describe techniques for making these measurements and give a link to a simple calculator for converting among radiometric and photometric measures, as well as an evaluation of the safety considerations these very bright sources demand.

© 2005 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(230.3670) Optical devices : Light-emitting diodes
(230.6080) Optical devices : Sources

History
Original Manuscript: July 22, 2004
Revised Manuscript: November 22, 2004
Manuscript Accepted: January 31, 2005
Published: July 1, 2005

Citation
Juan Manuel Benavides and Robert H. Webb, "Optical characterization of ultrabright LEDs," Appl. Opt. 44, 4000-4003 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-19-4000

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