Method and apparatus for enhanced laser-induced plasma spectroscopy using mixed-wavelength laser pulses
First Claim
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1. A method of analyzing the composition of heterogeneous materials comprising:
- providing a sample of a material to be analyzed;
directing a mixed-wavelength laser pulse at said sample to produce a plasma; and
determining the composition of said material from the emission spectrum of said plasma.
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Abstract
A sample of heterogeneous material is analyzed by directing a mixed-wavelength laser pulse at the sample to produce a plasma. The mixed wavelength pulse contains both shorter and longer wavelength components. The composition of the material is determined from the emission spectrum of the plasma.
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Citations
18 Claims
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1. A method of analyzing the composition of heterogeneous materials comprising:
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providing a sample of a material to be analyzed;
directing a mixed-wavelength laser pulse at said sample to produce a plasma; and
determining the composition of said material from the emission spectrum of said plasma. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of analyzing the composition of heterogeneous materials comprising:
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providing a sample of a material to be analyzed;
directing a mixed-wavelength laser pulse having one or more relatively shorter wavelength components that are initially well absorbed by the material to vaporize the material into a plasma and produce seed electrons and one or more relatively longer wavelength components that are absorbed in said plasma and induce plasma shielding; and
determining the composition of said material from the emission spectrum of said plasma. - View Dependent Claims (10, 11)
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12. An apparatus for use in the analysis of heterogeneous materials comprising:
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at least one laser for generating a mixed-wavelength pulsed laser beam; and
a focusing arrangement for focusing said mixed wavelength laser beam onto a sample to produce a plasma; and
a spectrum analyzer determining the composition of said material from the emission spectrum of said sample. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification