Thermal measuring and testing – Calorimetry – Total radiant energy or power measurement
Patent
1997-10-31
1999-11-09
Gutierrez, Diego
Thermal measuring and testing
Calorimetry
Total radiant energy or power measurement
G01K 1700
Patent
active
059801018
ABSTRACT:
The invention relates to a method and apparatus for accurately measuring the energy of a laser pulse. The method according to one embodiment comprises directing a first laser pulse to an energy sensor which produces a first signal responsive to the first laser pulse, determining a time constant of the energy sensor based on the first signal, directing a second laser pulse to the energy sensor which produces a second signal responsive to the second laser pulse, and determining the pulse energy of the second laser pulse based on the second signal and the time constant. The method may be carried out with an apparatus which comprises an energy sensor which receives a laser beam and generates a signal responsive to the laser beam, a digitizer which digitizes the signal, and a computer which calculates a time constant of the energy detector based on the digitized signal of the first laser pulse incident on the energy detector and calculates an energy of a second laser pulse based on the digitized signal of the second laser pulse and the time constant. The method and apparatus provide accurate and timely energy measurements which can be used to improve the laser shock peening process.
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Staver Phillip Randall
Unternahrer Josef Robert
Doan Quyen
General Electric Company
Gutierrez Diego
Maddry Tyler
Snyder Marvin
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