Special Section on Solid State Lighting

LED-based spectrally tunable source for radiometric, photometric, and colorimetric applications

[+] Author Affiliations
Irena Fryc

Bialystok University of Technology, Department of Optical Radiation, 15-351 Bialystok, Poland and National Institute of Standards and Technology, Optical Technology Division, 100 Bureau Drive, Gaithersburg, Maryland 20899

Steven W. Brown, George P. Eppeldauer, Yoshi Ohno

National Institute of Standards and Technology, Optical Technology Division, 100 Bureau Drive, Gaithersburg, Maryland 20899

Opt. Eng. 44(11), 111309 (November 03, 2005). doi:10.1117/1.2127952
History: Received August 26, 2004; Accepted June 13, 2005; Published November 03, 2005
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A spectrally tunable light source using a large number of LEDs and an integrating sphere has been designed and is being constructed at the National Institute of Standards and Technology. The source is designed to have a capability of producing any spectral distribution, mimicking various light sources in the visible region by feedback control of individual LEDs. The output spectral irradiance or radiance of the source will be calibrated by a reference instrument, and the source will be used as a spectroradiometric as well as a photometric and colorimetric standard. A series of simulations have been conducted to predict the performance of the designed tunable source when used for calibration of display colorimeters. The results indicate that the errors can be reduced by an order of magnitude when the tunable source is used to calibrate the colorimeters, compared with measurement errors when the colorimeters are calibrated against Illuminant A. The source can also approximate various CIE daylight illuminants and common lamp spectral distributions for other photometric and colorimetric applications.

© 2005 Society of Photo-Optical Instrumentation Engineers

Citation

Irena Fryc ; Steven W. Brown ; George P. Eppeldauer and Yoshi Ohno
"LED-based spectrally tunable source for radiometric, photometric, and colorimetric applications", Opt. Eng. 44(11), 111309 (November 03, 2005). ; http://dx.doi.org/10.1117/1.2127952


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