Test and evaluation of stability in IR staring focal plane arrays after nonuniformity correction

Computer Science – Performance

Scientific paper

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Drift (Instrumentation), Focal Plane Devices, Image Processing, Infrared Detectors, Stability Tests, Calibrating, Correction, Performance Tests, Pixels

Scientific paper

Consideration is given to techniques for the nonuniformity correction of IR staring focal plane arrays (FPAs), focusing on dirt in the array output. Results are presented from measurements of several MWIR FPAs to quantify drift of detector response as a function of time. The increase in spatial noise across the array is estimated, showing that this increase in caused by drift. It is found that drift in detector outputs is generally caused by either system instability or 1/f noise originating in the individual unit cells of the FPA. The general nature of drift and its effect on spatial noise is discussed. Measurements of 1/f noise are used to predict spatial noise.

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