Nonuniformity correction and correctability of infrared focal plane arrays

Max J. Schulz; Larry V. Caldwell

doi:10.1117/12.210050

22 May 1995 Nonuniformity correction and correctability of infrared focal plane arrays

Max J. Schulz, Larry V. Caldwell

Proceedings Volume 2470, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VI; (1995) https://doi.org/10.1117/12.210050
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

Correction of photoresponse nonuniformity in infrared staring sensor arrays is investigated. A general nonuniformity correction procedure is proposed. The procedure is based on multiple irradiation sources and on least square fit approximations to the individual pixel response characteristics. Nonlinearities of the signal response are taken into account. A correctability figure of merit is defined which may be used to estimate the residual fixed-pattern noise after correction. The correction procedure and the correctability are applied to a real data set measured by a 64 X 64 element infrared focal plane array (FPA). It is shown that an offset correction is insufficient for this data set and that a linear correction reduces the fixed- pattern noise contribution to the magnitude of the temporal noise background. The residual uncorrected fixed pattern noise can be related to pixels showing large temporal noise.

Citation Download Citation

Max J. Schulz and Larry V. Caldwell "Nonuniformity correction and correctability of infrared focal plane arrays", Proc. SPIE 2470, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VI, (22 May 1995); https://doi.org/10.1117/12.210050

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