Method and apparatus for spectroscopic characterization of...

Optics: measuring and testing – By light interference – For dimensional measurement

Reexamination Certificate

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Reexamination Certificate

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08054470

ABSTRACT:
A method of spectroscopic analysis of a material using a laser ultrasound system. The method includes measuring amplitude displacement of a target surface that has been excited with a generation laser. The amplitude displacements relate to the target's optical absorption properties. Amplitude displacements are generated over a range of laser wavelengths to obtain an optical absorption signature useful to identify the target material characteristics.

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patent: 6335943 (2002-01-01), Lorraine et al.
patent: 6668654 (2003-12-01), Dubois et al.
patent: 0107906 (2001-02-01), None
patent: WO 01/07906 (2001-02-01), None
patent: 0218958 (2002-03-01), None
patent: WO 02/18958 (2002-03-01), None
Dubois et al., “Experimental verificaton of the effects of optical wavelength on the amplitude of laser generated ultrasound in polymer-matrix composites”, Ultrasonics 40 (2002), pp. 809-812.
Dubois et al., “Experimental comparison between optical spectroscopy and laser-ultrasound generation in polymer-matrix composites”, Applied Physics Letter, vol. 79, No. 12, Sep. 17, 2001, pp. 1813-1815.
Dubois et al., “Progress on the Development of an Advanced Laser Ultrasound Generation Source for Inspecting Polymer-Matrix Composites”, CP615, Review of Quantitative Nondestructive Evaluation vol. 21, ed. by D.O. Thompson and D. E. Chimenti, American Institute of Physics (2002), pp. 300-307.
The International Search Report and the Written Opinion for PCT/US2009/043906 Dated May 14, 2009.
C. Edwards, et al.; Laser Generated Ultrasound: et al: “IEE Proceedings—Science, Measurement and Technology”; IEE Proceedings: Science, Measurement and Technology, IEE, Stevenage, Herts, GB, vol. 148, No. 4, Dated Jan. 1, 2001; pp. 129-142.
Guilliorit E et al.: “Laser Ultrasonic Technology in Europe for Innovative Inspection of Aircraft Strucutres”; 16th World Conference on NDT, Dated Jan. 1, 2004; pp. 1-8.
European Office Action dated Apr. 4, 2011 issued in EP Application Serial No. 09 747 550.3 (4 pages).

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