Patents by Inventor Andrei B. Vakhtin

Andrei B. Vakhtin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for non-destructive evaluation of ceramic coatings
    Patent number: 9488470
    Abstract: A method for evaluating the condition of a ceramic coating deposited on a substrate comprising illuminating the ceramic coating with light, measuring the intensity of light returned from the ceramic coating as function of depth in the coating and transverse position on the coating, and analyzing the measured light intensities to obtain one or more of intensity of the light returned from the exposed coating surface relative to the intensity of light returned from the coating/substrate interface, intensity of the light returned from the coating/substrate interface relative to the intensity of light returned from the bulk of the ceramic coating, determination of roughness at the exposed surface of the ceramic coating, and determination of roughness of the interface between the ceramic coating and underlying bond coat or substrate.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: November 8, 2016
    Assignees: UNIVERSITY OF CONNETICUT, SOUTHWEST SCIENCES INCORPORATED
    Inventors: Kristen A. Peterson, Elias P. Rosen, Eric H. Jordan, Sina Shahbazmohamadi, Andrei B. Vakhtin
  • Method and apparatus for full phase interferometry
    Patent number: 7394546
    Abstract: An apparatus and method for differential spectral interferometry comprising providing an interferometer comprising a light source; employing an element to provide a dithered relative phase shift between target and reference arms of the interferometer, detecting output from the interferometer, demodulating signals received from the detector at different multiples of the dither frequencies, generating more than one real-valued interferograms from demodulated signals, and using the real-valued interferograms to obtain the complex spectral interferogram.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: July 1, 2008
    Assignee: Southwest Sciences Incorporated
    Inventors: Andrei B. Vakhtin, Daniel J. Kane, Kristen A. Peterson
  • Method and apparatus for imaging internal structures of transparent and translucent materials
    Patent number: 7079254
    Abstract: An apparatus and method for spectral interferometry comprising providing an interferometer comprising a light source and dithering an element to provide a continuous relative phase shift between target and reference arms of the interferometer.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: July 18, 2006
    Assignee: Southwest Sciences Incorporated
    Inventors: Daniel J. Kane, Andrei B. Vakhtin, Kristen A. Peterson
  • Method and apparatus for imaging internal structures of transparent and translucent materials
    Publication number: 20040239946
    Abstract: An apparatus and method for spectral interferometry comprising providing an interferometer comprising a light source and dithering an element to provide a continuous relative phase shift between target and reference arms of the interferometer.
    Type: Application
    Filed: March 18, 2004
    Publication date: December 2, 2004
    Applicant: SOUTHWEST SCIENCES INCORPORATED
    Inventors: Daniel J. Kane, Andrei B. Vakhtin, Kristen A. Peterson