Patents by Inventor Andrea Veronica BRAGAS

Andrea Veronica BRAGAS 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 and apparatus for determining the thermal expansion of a material
    Patent number: 8622612
    Abstract: A focus error signal resulting from the photothermically-induced expansion is measured in a sample of material under analysis. A laser is disposed as a periodically modulated heating source which is directed to the sample and a device for focus error measuring which is directed to the surface being heated. A device measuring focus error generates a signal representative of the displacement of the surface of material in perpendicular direction due to the expansion produced by the periodic heating, which is filtered, either analogically or digitally, to discriminate the displacement component at the frequency in which it was modulated or at any other related frequency, such any harmonic or a sum with any other modulation. The focus error signal, appropriately calibrated, gives a precise and sensitive measure of the magnitude the expansion.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: January 7, 2014
    Assignee: Consejo Nacional de Investigaciones Cientificas y Tecnicas (Conicet)
    Inventors: Oscar Eduardo Martínez, Esteban Alejo Domené, Nélida Mingolo, Francisco Balzarotti, Andrea Verónica Bragas
  • METHOD AND APPARATUS FOR DETERMINING THE THERMAL EXPANSION OF A MATERIAL
    Publication number: 20100208242
    Abstract: A focus error signal resulting from the photothermically-induced expansion is measured in a sample of material under analysis. A laser is disposed as a periodically modulated heating source which is directed to the sample and a device for focus error measuring which is directed to de surface being heated. A device measuring focus error generates a signal representative of the displacement of the surface of material in perpendicular direction due to the expansion produced by the periodic heating, which is filtered, either analogically or digitally, to discriminate the displacement component at the frequency in which it was modulated or at any other related frequency, such any harmonic or a sum with any other modulation. The focus error signal, appropriately calibrated, gives a precise and sensitive measure of the magnitude the expansion.
    Type: Application
    Filed: February 12, 2010
    Publication date: August 19, 2010
    Applicant: CONSEJO NACIONAL DE INVESTIGACIONES CIENTIFICAS Y TECNICAS (CONICET)
    Inventors: Oscar Eduardo MARTÍNEZ, Esteban Alejo DOMENE, Nélida MINGOLO, Francisco BALZAROTTI, Andrea Veronica BRAGAS