Advertisement

International Journal of Thermophysics

, Volume 36, Issue 8, pp 1743–1756 | Cite as

High-Transmission Filters for Realizing Gray-Body Radiators

  • J. IshiiEmail author
  • Y. Yamada
Article

Abstract

Calibration of infrared radiation thermometers at non-unity emissivity settings is a poorly solved problem for establishment of traceability to meet user needs, for instruments with both fixed and variable emissivity setting functions. A variable-temperature gray-body radiator having a constant value of emissivity independent of both wavelength and temperature can be a perfect tool for the calibration purpose. In this paper, two types of high-transmittance optical neutral density filters, one utilizing a rotating-sector optical chopper, and another of a wire-mesh type, are shown to perform well with a precise transmittance between 90 % and 100 % in the wide infrared wavelength range. These optical filters in combination with a blackbody cavity traceable to ITS-90 can realize reliable gray-body radiation. These methods are applied successfully to several models of infrared thermometers operated in the emissivity correction mode.

Keywords

Calibration Emissivity setting Gray-body Infrared thermometer Optical filter 

Notes

Acknowledgments

The authors would like to express their gratitude to Y. Kaneko and Y. Wang of NMIJ for their able support in filter fabrication and measurement work. Dr. Hamada of Tanaka Kikinzoku Kogyo is thanked for useful advice regarding fabrication of the platinum–rhodium thin wires. The authors also feel grateful to Mr. Kerekrit of Technology Promotion Association in Thailand for prompting them to look at the technical problem.

References

  1. 1.
    L. Wang, in Proceedings of TEMPMEKO 2001, 8th International Symposium on Temperature and Thermal Measurements, in Industry and Science, ed. by B. Fellmuth, J. Seidel, G. Scholz (VDE Verlag, Berlin, 2002), pp. 735–740Google Scholar
  2. 2.
    P. Saunders, Meas. Sci. Technol. 20, 025104 (2009)zbMATHCrossRefGoogle Scholar
  3. 3.
    Trt, IV. 82 Transfer Radiation Thermometer (HEITRONICS Infrarot Messtechnik GmbH website), http://www.heitronics.com/en/infrarot-messtechnik/produkte/transfer-standards-calibrators/transfer-rad-therm/trt-iv82/trt-iv82/. Accessed 6 Jan 2015
  4. 4.
    J. Ishii, Y. Yamada, N. Sasajima, Y. Shimizu, in Proceedings of Ninth International Temperature Symposium (Los Angeles), Temperature: Its Measurement and Control, in Science and Industry, ed. by C.W. Meyer, A.I.P. Conference Proceedings 1552, vol. 8 (AIP, Melville, NY, 2013), pp. 666–671Google Scholar
  5. 5.
    IR-AH Series Handheld Type Digital Radiation Thermometers (Chino Corp. website), http://www.chino.co.jp/english/products/thermometers/ir-ah.html. Accessed 6 Jan 2015
  6. 6.
    Laser Marker Equipped Infrared Radiation Thermometer AD-5611A (A&D Co., Ltd. website), https://www.aandd.co.jp/adhome/products/sp/ad5611a.html. Accessed 6 Jan 2015 (in Japanese)

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan

Personalised recommendations