Skip to Content
Find More Like This
Return to Search

Method and apparatus for assessing material properties of sheet-like materials

United States Patent

6,486,962
November 26, 2002
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
Apparatus for producing an indication of a material property of a sheet-like material according to the present invention may comprise an excitation source for vibrating the sheet-like material to produce at least one traveling wave therein. A light source configured to produce an object wavefront and a reference wavefront directs the object wavefront toward the sheet-like material to produce a modulated object wavefront. A modulator operatively associated with the reference wavefront modulates the reference wavefront in synchronization with the traveling wave on the sheet-like material to produce a modulated reference wavefront. A sensing medium positioned to receive the modulated object wavefront and the modulated reference wavefront produces an image of the traveling wave in the sheet-like material, the image of the anti-symmetric traveling wave being related to a displacement amplitude of the anti-symmetric traveling wave over a two-dimensional area of the vibrating sheet-like material. A detector detects the image of the traveling wave in the sheet-like material.
Telschow; Kenneth L. (Idaho Falls, ID), Deason; Vance A. (Idaho Falls, ID)
Bechtel Bwxt Idaho, LLC (Idaho Falls, ID)
09/ 393,854
September 9, 1999
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. DE-AC07-94ID 13223 between the U.S. Department of Energy and Lockheed Martin Idaho Technologies Company.