Patents Assigned to USC--Dept. of Materials Science
  • System for local X-ray excitation by monochromatic X-rays
    Patent number: 4599741
    Abstract: A system for X-ray fluorescence analysis utilizes a plurality of parfocal diffractors to selectively monochromatize X-rays and focus them on a sample to be analyzed. In a preferred embodiment, each diffractor comprises a toroidally shaped crystal structure which, in the operative position of the diffractor, satisfies Johannson geometric conditions within a plurality of planes containing both a source of X-rays and a focused X-ray image.
    Type: Grant
    Filed: November 4, 1983
    Date of Patent: July 8, 1986
    Assignee: USC--Dept. of Materials Science
    Inventor: David B. Wittry