Patents by Inventor Marshall Lapp

Marshall Lapp 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).

  • Stable two-channel, single-filter spectrometer
    Patent number: 4081215
    Abstract: An instrument to make simultaneous accurate measurements of the intensity of light in each of two (or more) spectral channels using a single interference filter employs mirrors or prisms to break up the observed light beam into two (or more) beams, propagating in slightly different directions. The angle dependence of the filter spectral passband provides two distinct spectral channels which are focused onto separate detector elements. Advantages of this instrument are illustrated by its application for remote point Raman temperature measurements in hot gases.
    Type: Grant
    Filed: May 18, 1976
    Date of Patent: March 28, 1978
    Assignee: General Electric Company
    Inventors: Carl M. Penney, Marshall Lapp