Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber

Ward Small IV; Peter M. Celliers; Luiz B. Da Silva; Dennis L Matthews; Barbara A. Soltz

doi:10.1117/12.271014

Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber

Ward Small IV, Peter M. Celliers, Luiz B. Da Silva, Dennis L Matthews, Barbara A. Soltz

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

Abstract

A low-temperature fiber optic two-color infrared thermometer has been developed. Radiation from a target is collected via a single 700 micrometer-bore hollow glass optical fiber coated with a metallic/dielectric layer on the inner surface, simultaneously split into two paths and modulated by a gold-coated reflective chopper, and focused onto two thermoelectrically cooled mid-infrared HgCdZnTe photoconductors by 128.8 mm-radius gold-coated spherical mirrors. The photoconductors have spectral bandpasses of 2 - 6 micrometer and 2 - 12 micrometer, respectively. The modulated detector signals are recovered using lock-in amplification. The two signals are calibrated using a blackbody (emissivity equal to 1) of known temperature, and exponential fits are applied to the two resulting voltage versus temperature curves. Using the two calibration equations, a computer algorithm calculates the temperature and emissivity of a target in real time, taking into account reflection of the background radiation field from the target surface.

Original language	English (US)
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Pages	115-120
Number of pages	6
Volume	2977
DOIs	https://doi.org/10.1117/12.271014
State	Published - 1997
Externally published	Yes
Event	Specialty Fiber Optics for Biomedical and Industrial Applications - San Jose, CA, United States Duration: Feb 10 1997 → Feb 10 1997

Other

Other	Specialty Fiber Optics for Biomedical and Industrial Applications
Country	United States
City	San Jose, CA
Period	2/10/97 → 2/10/97

Keywords

Blackbody
Emissivity
Hollow glass waveguide
Infrared
Lock-in amplification
Radiation thermometry

ASJC Scopus subject areas

Applied Mathematics
Computer Science Applications
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1117/12.271014

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Cite this

Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber. / Small IV, Ward; Celliers, Peter M.; Da Silva, Luiz B.; Matthews, Dennis L; Soltz, Barbara A.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 2977 1997. p. 115-120.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Small IV, W, Celliers, PM, Da Silva, LB, Matthews, DL & Soltz, BA 1997, Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 2977, pp. 115-120, Specialty Fiber Optics for Biomedical and Industrial Applications, San Jose, CA, United States, 2/10/97. https://doi.org/10.1117/12.271014

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title = "Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber",

abstract = "A low-temperature fiber optic two-color infrared thermometer has been developed. Radiation from a target is collected via a single 700 micrometer-bore hollow glass optical fiber coated with a metallic/dielectric layer on the inner surface, simultaneously split into two paths and modulated by a gold-coated reflective chopper, and focused onto two thermoelectrically cooled mid-infrared HgCdZnTe photoconductors by 128.8 mm-radius gold-coated spherical mirrors. The photoconductors have spectral bandpasses of 2 - 6 micrometer and 2 - 12 micrometer, respectively. The modulated detector signals are recovered using lock-in amplification. The two signals are calibrated using a blackbody (emissivity equal to 1) of known temperature, and exponential fits are applied to the two resulting voltage versus temperature curves. Using the two calibration equations, a computer algorithm calculates the temperature and emissivity of a target in real time, taking into account reflection of the background radiation field from the target surface.",

keywords = "Blackbody, Emissivity, Hollow glass waveguide, Infrared, Lock-in amplification, Radiation thermometry",

author = "{Small IV}, Ward and Celliers, {Peter M.} and {Da Silva}, {Luiz B.} and Matthews, {Dennis L} and Soltz, {Barbara A.}",

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AU - Da Silva, Luiz B.

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AU - Soltz, Barbara A.

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N2 - A low-temperature fiber optic two-color infrared thermometer has been developed. Radiation from a target is collected via a single 700 micrometer-bore hollow glass optical fiber coated with a metallic/dielectric layer on the inner surface, simultaneously split into two paths and modulated by a gold-coated reflective chopper, and focused onto two thermoelectrically cooled mid-infrared HgCdZnTe photoconductors by 128.8 mm-radius gold-coated spherical mirrors. The photoconductors have spectral bandpasses of 2 - 6 micrometer and 2 - 12 micrometer, respectively. The modulated detector signals are recovered using lock-in amplification. The two signals are calibrated using a blackbody (emissivity equal to 1) of known temperature, and exponential fits are applied to the two resulting voltage versus temperature curves. Using the two calibration equations, a computer algorithm calculates the temperature and emissivity of a target in real time, taking into account reflection of the background radiation field from the target surface.

AB - A low-temperature fiber optic two-color infrared thermometer has been developed. Radiation from a target is collected via a single 700 micrometer-bore hollow glass optical fiber coated with a metallic/dielectric layer on the inner surface, simultaneously split into two paths and modulated by a gold-coated reflective chopper, and focused onto two thermoelectrically cooled mid-infrared HgCdZnTe photoconductors by 128.8 mm-radius gold-coated spherical mirrors. The photoconductors have spectral bandpasses of 2 - 6 micrometer and 2 - 12 micrometer, respectively. The modulated detector signals are recovered using lock-in amplification. The two signals are calibrated using a blackbody (emissivity equal to 1) of known temperature, and exponential fits are applied to the two resulting voltage versus temperature curves. Using the two calibration equations, a computer algorithm calculates the temperature and emissivity of a target in real time, taking into account reflection of the background radiation field from the target surface.

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KW - Emissivity

KW - Hollow glass waveguide

KW - Infrared

KW - Lock-in amplification

KW - Radiation thermometry

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