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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 28 — Oct. 1, 2002
  • pp: 5879–5890

Realization of the National Institute of Standards and Technology detector-based spectral irradiance scale

Howard W. Yoon, Charles E. Gibson, and Patricia Y. Barnes  »View Author Affiliations


Applied Optics, Vol. 41, Issue 28, pp. 5879-5890 (2002)
http://dx.doi.org/10.1364/AO.41.005879


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Abstract

A detector-based spectral irradiance scale has been realized at the National Institute of Standards and Technology (NIST). Unlike the previous NIST spectral irradiance scales, the new scale is generated with filter radiometers calibrated for absolute spectral power responsivity traceable to the NIST high-accuracy cryogenic radiometer instead of with the gold freezing-point blackbody. The calibrated filter radiometers are then used to establish the radiance temperature of a high-temperature blackbody (HTBB) operating near 3000 K. The spectral irradiance of the HTBB is then determined with knowledge of the geometric factors and is used to assign the spectral irradiances of a group of 1000-W free-electron laser lamps. The detector-based spectral irradiance scale results in the reduction of the uncertainties from the previous source-based spectral irradiance scale by at least a factor of 2 in the ultraviolet and visible wavelength regions. The new detector-based spectral irradiance scale also leads to a reduction in the uncertainties in the shortwave infrared wavelength region by at least a factor of 2–10, depending on the wavelength. Following the establishment of the spectral irradiance scale in the early 1960s, the detector-based spectral irradiance scale represents a fundamental change in the way that the NIST spectral irradiance scale is realized.

© 2002 Optical Society of America

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4800) Instrumentation, measurement, and metrology : Optical standards and testing
(120.5630) Instrumentation, measurement, and metrology : Radiometry

History
Original Manuscript: January 7, 2002
Revised Manuscript: June 6, 2002
Published: October 1, 2002

Citation
Howard W. Yoon, Charles E. Gibson, and Patricia Y. Barnes, "Realization of the National Institute of Standards and Technology detector-based spectral irradiance scale," Appl. Opt. 41, 5879-5890 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-28-5879

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