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.
Document Type
Patent
Status
Issued
Issue Date
6-2-2020
Patent Number
US 10670745 B1
CPC Classification
G01J1/44; G01T7/005
Application number
16/134299
Assignees
Government of the United States, as represented by the Secretary of the Air Force, Wright-Patterson AFB, OH (US)
Filing Date
9-18-2018
Recommended Citation
Catarius, Adrian M., Nicholas Yielding, Stephen C. Cain, and Michael D. Seal. 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. United States Patent 10670745 (B1), issued 2 June 2020. https://scholar.afit.edu/patents/28