Two-color mid-infrared thermometer using a hollow glass optical fiber

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A non-invasive two-color infrared thermometer has been developed for low-temperature biomedical applications. Mid-infrared radiation from the target is collected via a single 700 {mu}m-bore hollow glass optical fiber, simultaneously split into two paths and modulated by a gold-coated reflective optical chopper, and focused onto two thermoelectrically-cooled HgCdZnTe photoconductors (bandpasses of 2- 6 {mu}m and 2-12 {mu}m, respectively) by gold-coated spherical mirrors. The small numerical aperture of the hollow glass fiber provides high spatial resolution (is less than 1 mm), and the hollow bore eliminates reflective losses. The modulated detector signals are recovered using lock-in amplification, permitting measurement of small low-temperature ... continued below

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12 p.; Other: FDE: PDF; PL:

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Small, W., IV.; Celliers, P.M.; Da Silva, L.D. & Matthews, D.L. June 30, 1997.

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A non-invasive two-color infrared thermometer has been developed for low-temperature biomedical applications. Mid-infrared radiation from the target is collected via a single 700 {mu}m-bore hollow glass optical fiber, simultaneously split into two paths and modulated by a gold-coated reflective optical chopper, and focused onto two thermoelectrically-cooled HgCdZnTe photoconductors (bandpasses of 2- 6 {mu}m and 2-12 {mu}m, respectively) by gold-coated spherical mirrors. The small numerical aperture of the hollow glass fiber provides high spatial resolution (is less than 1 mm), and the hollow bore eliminates reflective losses. The modulated detector signals are recovered using lock-in amplification, permitting measurement of small low-temperature signal buried in the background. A computer algorithm calculates the true temperature and emissivity of the target in real time based on a previous blackbody (emissivity equal to 1) calibration, taking into account reflection of the ambient radiation field from the target surface.

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12 p.; Other: FDE: PDF; PL:

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OSTI as DE98057435

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  • Conference on the engineering foundation, Snowbird, UT (United States), 13-18 Jul 1997

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  • Other: DE98057435
  • Report No.: UCRL-JC--128082
  • Report No.: CONF-9707172--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 304678
  • Archival Resource Key: ark:/67531/metadc679045

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  • June 30, 1997

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 17, 2016, 7:28 p.m.

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Small, W., IV.; Celliers, P.M.; Da Silva, L.D. & Matthews, D.L. Two-color mid-infrared thermometer using a hollow glass optical fiber, article, June 30, 1997; California. (digital.library.unt.edu/ark:/67531/metadc679045/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.