Patents by Inventor Leonard M. Smithline

Leonard M. Smithline 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).

  • Temperature compensation of tunable acoustic optical filters
    Patent number: 4422154
    Abstract: The heating of a tunable-acoustic optical filter (TAOF) results in a drift in the calibration of the TAOF as the acoustic-optical medium temperature varies. In practicing the invention, the TAOF is calibrated by combining it in tandem with a broad band light source and a cell containing a medium that absorbs light at a known wave number. The TAOF is tuned to minimize the light transmitted through the elements, thereby tuning the TAOF to the wave number of maximum absorption which is a calibrated standard.
    Type: Grant
    Filed: February 27, 1981
    Date of Patent: December 20, 1983
    Assignee: Lansing Research Corporation
    Inventors: Leonard M. Smithline, George J. Wolga
  • Temperature compensation of tunable acoustic optical filters
    Patent number: 4272825
    Abstract: The heating of a tunable-acoustic optical filter (TAOF) results in a drift in the calibration of the TAOF as the acoustic-optical medium temperature varies. In practicing the invention, the TAOF is periodically locked to a reference wavenumber and a calibration correction is then derived and employed to keep the TAOF consistently accurate.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: June 9, 1981
    Assignee: Lansing Research Corporation
    Inventors: Leonard M. Smithline, George J. Wolga
  • Tuning of etalons in spectroscopic apparatus
    Patent number: 4092070
    Abstract: Light passing through an etalon is divided into three beams, each beam being incident to the etalon at a different angle. Two of the beams are received by detectors which generates intensity representative signal for each beam. The difference between the beam intensities represents the error between the etalon's passband and the wavenumber of the received light.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: May 30, 1978
    Assignee: Lansing Research Corporation
    Inventor: Leonard M. Smithline