Patents by Inventor Andrei Brunfeld

Andrei Brunfeld 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).

  • Differential phase contrast inspection system
    Patent number: 5459576
    Abstract: A high speed, high sensitivity inspection system (10) is provided, which is substantially impervious to external factors such as vibration. The inspection system is an optical system which employs phase contrast interferometry to achieve the desired results.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: October 17, 1995
    Assignee: Display Inspection Systems, Inc.
    Inventors: Andrei Brunfeld, Gregory Toker, Zvi Yaniv, Ilan Laver
  • Interferometric measurement device with non stabilized light source
    Patent number: 5189489
    Abstract: The present invention relates to a method for greatly extending the effective coherence length of non-stabilized lasers allowing one to use them in interferometers with large optical path differences. The embodiment described as an example comprises a robust Twyman-Green interferometer for accurate measurement of extended displacements.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: February 23, 1993
    Assignee: Amsys Ltd.
    Inventor: Andrei Brunfeld