Method and apparatus for determining absorption of electromagnetic radiation by a material
First Claim
1. 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 is not absorbed but is scattered by the material relative to a direction of propagation of the at least one light pulse;
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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Accused Products
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.
88 Citations
25 Claims
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1. 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:
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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 is not absorbed but is scattered by the material relative to a direction of propagation of the at least one light pulse;
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Apparatus for determining an absorption coefficient of a material for light of a given wavelength comprising:
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a light source that transmits a pulse of light at the given wavelength that traverses a path through the material;
a detector that receives light from the light pulse that is not absorbed but is scattered by the material relative to a direction of propagation of the at least one light pulse and generates a first signal responsive thereto;
a detector that receives energy emitted by the material responsive to light from the light pulse that is absorbed by the material and generates a second signal responsive to the received energy; and
a processor that receives the first and second signals and uses the signals to determine the absorption coefficient. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification