5 August 2004 A chopper-free measurement-based parametric-fitting nonuniformity correction system
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In traditional designs of a NUC (non-uniformity correction) system, a rotating chopper-wheel (or a blurring/deform lens) is used to separate the outside scene and the inside FPN (fixed pattern noise) on the FPA (focal plane array). To design a NUC system removing the chopper-wheel (chopper-free) and its control electronics and hardware will not only considerably reduce the cost, but also require less space to fit the NUC system. In this paper, we describe a recently developed CF (chopper-free) NUC system. This system is simpler to build, costs less, and requires less space, as compared with traditional designs.
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Hai-Wen Chen, Hai-Wen Chen, Felix Fontan, Felix Fontan, Teresa Olson, Teresa Olson, } "A chopper-free measurement-based parametric-fitting nonuniformity correction system", Proc. SPIE 5407, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XV, (5 August 2004); doi: 10.1117/12.541363; https://doi.org/10.1117/12.541363

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