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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 14 — May. 10, 2008
  • pp: 2637–2647

Array-based goniospectroradiometer for measurement of spectral radiant intensity and spectral total flux of light sources

Michael Shaw and Teresa Goodman  »View Author Affiliations

Applied Optics, Vol. 47, Issue 14, pp. 2637-2647 (2008)

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We present a description of a new goniospectroradiometric measurement system developed at the National Physical Laboratory (NPL). The instrument incorporates a modified array spectrometer and a series of rotary stages to allow measurement of the spectral radiant intensity distribution of a variety of different types of light source from 350 to 830 nm . Associated source properties such as chromaticity and correlated color temperature distributions and total spectral flux are then calculated from the radiant intensity data. A preliminary comparison with NPL’s integrating sphere-based luminous flux scale shows agreement to within 0.4%, well within the combined measurement uncertainty. Measurements of the luminous intensity and color temperature distributions and the spectral total flux of a tungsten filament flux standard, a white LED cluster and a compact fluorescent source made using the goniospectroradiometer, are also presented.

© 2008 Optical Society of America

OCIS Codes
(040.1240) Detectors : Arrays
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5240) Instrumentation, measurement, and metrology : Photometry
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(230.6080) Optical devices : Sources

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: January 23, 2008
Manuscript Accepted: February 25, 2008
Published: May 6, 2008

Michael Shaw and Teresa Goodman, "Array-based goniospectroradiometer for measurement of spectral radiant intensity and spectral total flux of light sources," Appl. Opt. 47, 2637-2647 (2008)

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