Radiant energy – Luminophor irradiation – Methods
Patent
1999-04-19
1999-11-16
Hannaher, Constantine
Radiant energy
Luminophor irradiation
Methods
2504844, 374161, 374159, G01K 1100
Patent
active
059862726
ABSTRACT:
A method for determining the temperature of a fluorescing phosphor is provided, together with an apparatus for performing the method. The apparatus includes a photodetector for detecting light emitted by a phosphor irradiated with an excitation pulse and for converting the detected light into an electrical signal. The apparatus further includes a differentiator for differentiating the electrical signal and a zero-crossing discrimination circuit that outputs a pulse signal having a pulse width corresponding to the time period between the start of the excitation pulse and the time when the differentiated electrical signal reaches zero. The width of the output pulse signal is proportional to the decay-time constant of the phosphor.
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Allison Steve W.
Beshears David L.
Britton, Jr. Charles L.
Cates Michael R.
Simpson Marc L.
American Iron and Steel Institute
Gagliardi Albert
Hannaher Constantine
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