Post Focal Plane Processing For Staring IR Imagers

R. Fitch; N. A. Foss; P. Narendra

doi:10.1117/12.959323

18 February 1981 Post Focal Plane Processing For Staring IR Imagers

R. Fitch, N. A. Foss, P. Narendra

Proceedings Volume 0244, Mosaic Focal Plane Methodologies I; (1981) https://doi.org/10.1117/12.959323
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

Abstract

Staring infrared imagers presently under development possess an inherent fixed pattern noise characteristic at the output which is Primarily determined by the non-uniformities in detector resoonsivity, CCD threshold variations and detector/CCD electrical coupling circuitry. This fixed pattern noise can take up as much as 50% of the focal plane dynamic range and, as such, generally requires high accuracy, high speed compensation electronics which then allows the full NEAT sensitivity oerformance of the focal plane to be realized. This paper describes the requirements for the comoensation electronics and discusses different implementation circuitry for both conventional "shuttered" calibration (i.e., reimaging of a uniform thermal reference source to calibrate the non-uniformity coefficients) and for a concept which has been developed called the "shutterless" compensation which uses scene dynamics and statistics to calculate the correction coefficient values.

Citation Download Citation

R. Fitch, N. A. Foss, and P. Narendra "Post Focal Plane Processing For Staring IR Imagers", Proc. SPIE 0244, Mosaic Focal Plane Methodologies I, (18 February 1981); https://doi.org/10.1117/12.959323

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