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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 19 — Jul. 1, 1999
  • pp: 4053–4057

Water at the Ice Point: A Useful Quasi-Blackbody Infrared Calibration Source

James W. Horwitz  »View Author Affiliations


Applied Optics, Vol. 38, Issue 19, pp. 4053-4057 (1999)
http://dx.doi.org/10.1364/AO.38.004053


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Abstract

Water at the ice point makes a good calibration source in the 4- to 13-μm spectral region because of its high emissivity, small skin depth, and the ease with which an ice-point bath may be prepared and used. In a simple ice bath the emissivity is slightly less than unity, and we have calculated corrections that allow one to predict the apparent radiation temperature of the equivalent blackbody. We propose an alternate configuration that uses an auxiliary mirror. This configuration should provide an emissivity extremely close to unity.

© 1999 Optical Society of America

OCIS Codes
(010.7340) Atmospheric and oceanic optics : Water
(110.6820) Imaging systems : Thermal imaging
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(160.4760) Materials : Optical properties
(260.3060) Physical optics : Infrared

Citation
James W. Horwitz, "Water at the Ice Point: A Useful Quasi-Blackbody Infrared Calibration Source," Appl. Opt. 38, 4053-4057 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-19-4053


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References

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