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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 25 — Sep. 1, 2012
  • pp: 6003–6008

Infrared spectral responsivity scale realization and validations

George P. Eppeldauer and Vyacheslav B. Podobedov  »View Author Affiliations

Applied Optics, Vol. 51, Issue 25, pp. 6003-6008 (2012)

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An InSb working standard radiometer, first calibrated at the National Institute of Standards and Technology (NIST) in 1999 against a cryogenic bolometer, was recently calibrated against a newly developed low-noise-equivalent-power pyroelectric transfer standard detector. The pyroelectric transfer standard, which can operate at the output of a monochromator, holds the newly realized NIST spectral power responsivity scale between 1.7 and 14 μm with an uncertainty of 1% (k=2). The InSb working standard was also measured at the National Physical Laboratory (NPL) of the United Kingdom in 1999. The less than 2% spectral power responsivity disagreements obtained on the InSb working standard (both from the 1999 NIST and NPL comparison and also against the pyroelectric standard) validate the three independently realized power responsivity scales and verify the long-term stability of the InSb working standard. The InSb working standard was also used in irradiance measurement mode to validate the previously determined spectral irradiance responsivity of four narrowband InSb radiometers that were applied to calibrate IR target simulators. The uncertainty of the present spectral irradiance responsivity scale held by the InSb working standard is 2.5% (k=2) in the 2 to 5.2 μm wavelength range.

© 2012 Optical Society of America

OCIS Codes
(040.0040) Detectors : Detectors
(040.3060) Detectors : Infrared
(040.5160) Detectors : Photodetectors
(120.5630) Instrumentation, measurement, and metrology : Radiometry

ToC Category:

Original Manuscript: May 22, 2012
Revised Manuscript: July 26, 2012
Manuscript Accepted: July 27, 2012
Published: August 23, 2012

George P. Eppeldauer and Vyacheslav B. Podobedov, "Infrared spectral responsivity scale realization and validations," Appl. Opt. 51, 6003-6008 (2012)

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  1. G. P. Eppeldauer and M. Racz, “Spectral power and irradiance responsivity calibration of InSb working standard radiometers,” Appl. Opt. 39, 5739–5744 (2000). [CrossRef]
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