Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1980-05-09
1981-12-01
Woodiel, Donald O.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
G01K 100
Patent
active
043029701
ABSTRACT:
A temperature probe formed by an optical fiber having a core fabricated from a glass host doped with a trivalent rare earth is positioned at the location temperature is to be measured. One of the rare earth elements, europium, has low lying energy levels that have significant population changes over certain desirable temperature ranges, i.e., related to the population of this particular energy level transition is monitored to determine the temperature at the location of the temperature probe. A simplified embodiment of a temperature measuring device incorporating the optical temperature probe includes at least one LED, or equivalent, to generate light into the input end of the optical fiber. The preselected wavelength of light that corresponds to the absorption line of interest experiences a change in strength as function of temperature. A detector at the output end measures changes in strength of the absorbed light by normalizing to an unabsorbed wavelength of light.
REFERENCES:
patent: 3672221 (1972-06-01), Well
patent: 4151747 (1979-05-01), Gottlieb et al.
patent: 4179927 (1979-12-01), Saaski
patent: 4203326 (1980-05-01), Gottlieb et al.
Glenn William H.
Snitzer Elias
Lange Richard P.
United Technologies Corporation
Woodiel Donald O.
LandOfFree
Optical temperature probe employing rare earth absorption does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical temperature probe employing rare earth absorption, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical temperature probe employing rare earth absorption will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1291794