Thermal measuring and testing – Calorimetry – Total radiant energy or power measurement
Patent
1993-06-17
1995-04-25
Gutierrez, Diego F. F.
Thermal measuring and testing
Calorimetry
Total radiant energy or power measurement
2503381, 250340, 356216, G01K 1700
Patent
active
054093147
ABSTRACT:
A pocket size laser power meter adapted to measure the power of laser energy emitted by a laser. The power meter includes a thermal mass adapted to receive the laser energy. A temperature sensor coupled to the thermal mass translates temperature changes in the thermal mass into an electrical sensor signal having a variable voltage. A differentiator coupled to the temperature sensor receives the electrical sensor signal and produces a differentiated signal indicative of the rate of change of voltage of the electrical sensor signal. A cooling rate holding circuit coupled to the differentiator receives a cooling portion of the differentiated signal indicating a lowering of the temperature of the thermal mass. A heating rate holding circuit coupled to the differentiator receives a heating portion of the differentiated signal indicating a raising of the temperature of the thermal mass. A display meter coupled to the holding circuits adds the cooling and heating portions of the differentiated signal together, translates the differentiated signal into a power reading, and displays the power reading to a operator.
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Gutierrez Diego F. F.
Synrad
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