Patents by Inventor Franco Rasello

Franco Rasello 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 detecting surface defects in a workpiece
    Patent number: 4296333
    Abstract: Quality control inspection of the surface of a workpiece is effected by scanning a coherent monochromatic light beam over the workpiece surface. Photomultipliers are used to generate two electrical signals respectively indicative of the magnitude of the specular component of light reflected from the workpiece and of the component of light scattered in a predetermined direction off the workpiece. These two signals are combined in a manner which serves to eliminate noise due to surface roughness of the workpiece. The combined signal is compared with a threshold value to provide an indication of surface defects. The inspection apparatus can incorporate a laser for producing the light beam which can be conveniently scanned across the workpiece surface using an oscillating mirror.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: October 20, 1981
    Assignee: Centro Ricerche Fiat S.p.A.
    Inventors: Emilio Milana, Franco Rasello