Patents by Inventor Francis M. Luk

Francis M. Luk 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 assessing surface roughness
    Patent number: 4878114
    Abstract: A relatively low cost processor based optical system is used to carry out the method. An area of the surface whose roughness is to be assessed is illuminated by a light source, and a reflected light is directed to the lens of the video camera. The analog output of the video camera is digitized, and the digital signal is provided to a processor which performs an analysis to provide a parameter indicative of the roughness of the surface.
    Type: Grant
    Filed: May 10, 1988
    Date of Patent: October 31, 1989
    Assignee: University of Windsor
    Inventors: Van-Minh Huynh, Francis M. Luk