Method and apparatus for determining absorption of electromagnetic radiation by a material
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United States of America Patent
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Issued Date -
May 19, 2005
app pub date -
Dec 20, 2004
filing date -
Oct 9, 2001
priority date (Note) -
Abandoned
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Abstract
A method of determining a portion of light at a given wavelength which is incident on a material that is absorbed by the material, the method comprising: transmitting a pulse of light at the given wavelength so that the pulse traverses a path through the material; generating a first signal responsive to light in the light pulse that traverses the path length without being absorbed by the material; generating a second signal responsive to energy that the material emits responsive to a portion of the light from the light pulse that is absorbed by the material as the light pulse traverses the path; and using the first and second signals to determine the absorbed portion.
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