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 | |
| 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 |
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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
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
}
TY - GEN
T1 - Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber
AU - Small IV, Ward
AU - Celliers, Peter M.
AU - Da Silva, Luiz B.
AU - Matthews, Dennis L
AU - Soltz, Barbara A.
PY - 1997
Y1 - 1997
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.
KW - Blackbody
KW - Emissivity
KW - Hollow glass waveguide
KW - Infrared
KW - Lock-in amplification
KW - Radiation thermometry
UR - http://www.scopus.com/inward/record.url?scp=0001603052&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001603052&partnerID=8YFLogxK
U2 - 10.1117/12.271014
DO - 10.1117/12.271014
M3 - Conference contribution
AN - SCOPUS:0001603052
VL - 2977
SP - 115
EP - 120
BT - Proceedings of SPIE - The International Society for Optical Engineering
ER -