Method for measuring spectral absorption in a body and device therefor
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United States of America Patent
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May 6, 2003
Grant Date -
N/A
app pub date -
Jan 27, 2001
filing date -
Aug 7, 1998
priority date (Note) -
Expired
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Abstract
The spectral absorption of a body, placed between a source for emitting electromagnetic radiation and a detector for detecting the radiation, is measured. The technique includes emitting the electromagnetic radiation in a determined spectral range towards the body, filtering the electromagnetic radiation, and detecting the electromagnetic radiation attenuated by the absorption due to the body and deducing therefrom a measure of the spectral absorption of the body. The filtering and detection steps are implemented by a detector of the quantum type. The technique also applies to determining the calorific value of a gas, for measuring the energy of electromagnetic radiation, and an apparatus for implementing the technique.
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