Thermal measuring and testing – Temperature measurement – Nonelectrical – nonmagnetic – or nonmechanical temperature...
Patent
1993-01-28
1994-07-26
Gutierrez, Diego F. F.
Thermal measuring and testing
Temperature measurement
Nonelectrical, nonmagnetic, or nonmechanical temperature...
374142, 374143, 374120, 356 44, 25022718, 25022723, 2504581, G01K 1120, G01K 1300
Patent
active
053323165
ABSTRACT:
The invention is drawn to methods and devices for measuring temperature with a simple probe, a single interrogating light source and a single photodetector in a manner that the same probe can be used for simultaneously sensing another physical parameter, using the same interrogating light source and the same photodetector. The invention also allows the use of a single probe for measuring temperature in two independent physical modes, using a single interrogating light source and a single photodetector. In a preferred embodiment the probe includes a photoluminescent material having a luminescence decay time which decreases substantially with increasing temperature over a temperature range within which its luminescence quantum efficiency remains approximately constant or varies only minimally.
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