Patents by Inventor Stephen C. Cain

Stephen C. Cain 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).

  • Statistical photo-calibration of photo-detectors for radiometry without calibrated light sources comprising an arithmetic unit to determine a gain and a bias from mean values and variance values
    Patent number: 10670745
    Abstract: Calibration of a radiometry system uses a readout circuit of a photo-detector to provide first and second measurements collected over first and second integration times, respectively, where the first and second measurements are related to a photonic input to the photo-detector by a gain and a bias. First mean and variance values are computed for a plurality of first measurements. Second mean and variance values are computed for a plurality of second measurements. The gain and bias are determined from the first and second mean values and the first and second variance values without the use of a calibrated source. The rate of photonic input to the photo-detector and the variance of noise added in the readout circuit may also be determined.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: June 2, 2020
    Assignee: The Government of the United States as Represented by the Secretary of the United States
    Inventors: Adrian M. Catarius, Nicholas Yielding, Stephen C. Cain, Michael Dan Seal