Claims
- 1. A temperature measurement system comprising:
- a phosphorescent material adapted for placement in an environment the temperature of which is to be measured, said material including one of the active rare earth substances chosen from the group consisting of Yb, Er, Tm, and Ho and one of the parent substances chosen from the group consisting of GdF.sub.3, LaF.sub.3, YF.sub.3, LuF.sub.3, CaF.sub.2, BaF.sub.2, BaYF.sub.5, NaLuF.sub.4 and Y.sub.3 OCl.sub.7 ;
- means for exciting said material to emit phosphorescent light, said exciting means comprising a light emitting diode for irradiating said material with infrared radiation to excite said material;
- means for receiving emitted light and detecting the intensity thereof; and
- means for integrating the value of intensity for a given time only following cessation of excitation to determine said temperature.
- 2. A temperature measurement system comprising:
- a phosphorescent material adapted for placement in an environment the temperature of which is to be measured, said material chosen from the group consisting of NdP.sub.5 O.sub.14, and Li(Nd, Yb)P.sub.4 O.sub.12 ;
- means for exciting said material to emit phosphorescent light, said exciting means comprising a light emitting diode for irradiating said material with infrared radiation to excite said material;
- means for receiving emitted light and detecting the intensity thereof; and
- means for integrating the value of intensity for a given time only following cessation of excitation to determine said temperature.
Priority Claims (1)
Number |
Date |
Country |
Kind |
56-51997 |
Apr 1981 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 365,028, filed Apr. 2, 1982, which was abandoned upon the filing hereof.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2064107 |
Jun 1981 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
365028 |
Apr 1982 |
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