Patents by Inventor Alain F. R. Thevenon

Alain F. R. Thevenon 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).

  • Modified concentric spectrograph
    Patent number: 5995221
    Abstract: A modified concentric spectrograph for diffracting light with high stray light rejection without astigmatism is provided. The modified spectrograph includes a grating, a lens, and at least one entrance port and one exit port. The grating has a concave surface and a meridian plane with a first side and a second side. The lens has a substantially planar surface and a convex surface. Preferably, the convex and concave surfaces are substantially concentric. The ports are substantially located on different sides of the meridian plane near a focal plane of the spectrograph. The position of a focal plane may be modified using an optically transmissive triangular prism with a reflective surface, and an optically transmissive block. The position of a focal plane may further be modified with one or more optically transmissive plates. Methods for using the spectrograph are also provided.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: November 30, 1999
    Assignee: Instruments S.A., Inc.
    Inventors: Warren S. Slutter, Wu Jiang, Alain F. R. Thevenon, Viviane D. Millet, Jeremy J. Goldstone
  • Modified concentric spectrograph
    Patent number: RE42822
    Abstract: A modified concentric spectrograph for diffracting light with high stray light rejection without astigmatism is provided. The modified spectrograph includes a grating, a lens, and at least one entrance port and one exit port. The grating has a concave surface and a meridian plane with a first side and a second side. The lens has a substantially planar surface and a convex surface. Preferably, the convex and concave surfaces are substantially concentric. The ports are substantially located on different sides of the meridian plane near a focal plane of the spectrograph. The position of a focal plane may be modified using an optically transmissive triangular prism with a reflective surface, and an optically transmissive block. The position of a focal plane may further be modified with one or more optically transmissive plates. Methods for using the spectrograph are also provided.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: October 11, 2011
    Assignee: Horiba Jobin-Yvon, Inc.
    Inventors: Warren S. Slutter, Wu Jiang, Alain F. R. Thevenon, Viviane D. Millet, Jeremy J. Goldstone