Patents by Inventor Michael T. Feeney

Michael T. Feeney 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).

  • Nonuniform holographic filter in a spectroscopic system
    Patent number: 5221957
    Abstract: A holographic filter comprises a volume hologram recorded with Bragg surfaces for use in spectroscopic and spectral splitting applications. The Bragg planes in the holographic filter can be recorded to satisfy virtually any design constraint imposed upon the filter such as Raman, Lippmann, non-Snellian (slanted), curved, and multiplexed spectral filters. The holographic filter achieves maximal reduction of secondary maxima and sidelobes and obtains large wavelength selectivities, and varied grating constants.
    Type: Grant
    Filed: June 19, 1992
    Date of Patent: June 22, 1993
    Assignee: Physical Optics Corporation
    Inventors: Tomasz P. Jannson, Joanna L. Jannson, Michael T. Feeney
  • Holographic Lippmann-Bragg filter in a spectroscopic system
    Patent number: 5153670
    Abstract: A holographic filter comprises a volume hologram recorded with Bragg surfaces for use in spectroscopic and spectral splitting applications. The Bragg planes in the holographic filter can be recorded to satisfy virtually any design constraint imposed upon the filter such as Raman, Lippmann, non-Snellian (slanted), curved, and multiplexed spectral filters. The holographic filter achieves maximal reduction of secondary maxima and sidelobes and obtains large wavelength selectivities, and varied grating constants.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: October 6, 1992
    Assignee: Physical Optics Corporation
    Inventors: Tomasz P. Jannson, Joanna L. Jannson, Michael T. Feeney