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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 5 — Feb. 10, 2010
  • pp: 880–886

Spectral irradiance model for tungsten halogen lamps in 340 850 nm wavelength range

Maija Ojanen, Petri Kärhä, and Erkki Ikonen  »View Author Affiliations


Applied Optics, Vol. 49, Issue 5, pp. 880-886 (2010)
http://dx.doi.org/10.1364/AO.49.000880


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Abstract

We have developed a physical model for the spectral irradiance of 1 kW tungsten halogen incandescent lamps for the wavelength range 340 850 nm . The model consists of the Planck’s radiation law, published values for the emissivity of tungsten, and a residual spectral correction function taking into account unknown factors of the lamp. The correction function was determined by measuring the spectra of a 1000 W, quartz-halogen, tungsten coiled filament (FEL) lamp at different temperatures. The new model was tested with lamps of types FEL and 1000 W, 120 V quartz halogen (DXW). Comparisons with measurements of two national standards laboratories indicate that the model can account for the spectral irradiance values of lamps with an agreement better than 1% throughout the spectral region studied. We further demonstrate that the spectral irradiance of a lamp can be predicted with an expanded uncertainty of 2.6% if the color temperature and illuminance values for the lamp are known with expanded uncertainties of 20 K and 2%, respectively. In addition, it is suggested that the spectral irradiance may be derived from resistance measurements of the filament with lamp on and off.

© 2010 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5630) Instrumentation, measurement, and metrology : Radiometry

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: October 14, 2009
Revised Manuscript: December 21, 2009
Manuscript Accepted: January 11, 2010
Published: February 4, 2010

Citation
Maija Ojanen, Petri Kärhä, and Erkki Ikonen, "Spectral irradiance model for tungsten halogen lamps in 340-850 nm wavelength range," Appl. Opt. 49, 880-886 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-5-880

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