LASER PLASMA SPECTROSCOPY APPARATUS AND METHOD FOR IN SITU DEPTH PROFILING
First Claim
1. An in-situ laser plasma spectroscopy (LPS) system for automated near real-time elemental depth profiling of a target, comprising:
- an optical source configured to generate an optical beam, wherein the optical beam is pulsed;
an optical probe system configured to deliver the optical beam from the optical source to a surface of a target to generate an ablation plasma;
a time resolved spectral detection system configured to generate time resolved spectral data from emission signals from the ablation plasma; and
a data acquisition and processing system configured to acquire the time resolved spectral data to determine, in combination with predetermined calibration data, an absolute elemental concentration of the target as a function of depth in near real-time.
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Abstract
An in-situ laser plasma spectroscopy (LPS) system for automated near real-time elemental depth profiling of a target including: an optical source configured to generate an optical beam, wherein the optical beam is pulsed; an optical probe system configured to deliver the optical beam from the optical source to a surface of a target to generate an ablation plasma; a time resolved spectral detection system configured to generate time resolved spectral data from emission signals from the ablation plasma; and a data acquisition and processing system configured to acquire the time resolved spectral data to determine, in combination with predetermined calibration data, an absolute elemental concentration as a function of depth in near real-time.
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Citations
38 Claims
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1. An in-situ laser plasma spectroscopy (LPS) system for automated near real-time elemental depth profiling of a target, comprising:
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an optical source configured to generate an optical beam, wherein the optical beam is pulsed; an optical probe system configured to deliver the optical beam from the optical source to a surface of a target to generate an ablation plasma; a time resolved spectral detection system configured to generate time resolved spectral data from emission signals from the ablation plasma; and a data acquisition and processing system configured to acquire the time resolved spectral data to determine, in combination with predetermined calibration data, an absolute elemental concentration of the target as a function of depth in near real-time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An in-situ, portable laser plasma spectroscopy system for automated near real-time elemental depth profiling of a coating, comprising:
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an optical source configured to generate an optical beam, wherein the optical beam is pulsed; an optical probe system configured to deliver the optical beam from the optical source to a surface of a coating on a substrate to generate an ablation plasma, wherein the optical probe system comprises a beam-shaping element to produce an optical illumination zone of substantially uniform optical energy through a thickness of the coating; a time resolved spectral detection system configured to generate time resolved spectral data from emission signals from the ablation plasma; and a data acquisition and processing system configured to acquire the time resolved spectral data to determine, in combination with predetermined calibration data, an absolute elemental concentration of the coating as a function of depth in near real-time. - View Dependent Claims (27)
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28. A method for in-situ, near real time depth profiling, comprising:
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(a) acquiring calibration data; (b) performing at least one ablation cycle comprising; generating an optical beam, wherein the optical beam is pulsed; homogenizing the intensity of the optical beam to produce an optical illumination zone of substantially uniform optical energy on a surface of the target; and delivering the optical beam at the surface of the coating to generate an ablation plasma; (c) generating time resolved spectral data from emission signals received from the ablation plasma; and (d) using the time resolved spectral data and the calibration data for determining absolute elemental concentration at the probed surface of the target in near real-time. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification