Proceedings PaperTheoretical study of QWIP or QDIP IR-FPA non-uniformity correction
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We first derive a formula that can successfully describe the device nonlinearity between the IR incidence corresponding to the blackbody temperature T and the pixel output V for infrared detectors such as QWIPs or QDIPs, which have a peak (not cutoff) type photo response.
Second, using this formula, we show that, in theory, conventional "two-point correction" can completely correct the non-uniformity; therefore, in the case of QWIP- or QDIP-FPA, the origin of the NUC incompleteness, that is, the origin of the residual non-uniformity in an IR image, is the nonlinear input-output characteristics in the electronics.
Last, we show that the nonlinearity in the electronics can be corrected by using our formula to reconstruct an almost completely non-uniformity corrected IR image.
PDF: 6 pages
Proc. SPIE 9451, Infrared Technology and Applications XLI, 94512M (4 June 2015); doi: 10.1117/12.2176922
Published in SPIE Proceedings Vol. 9451:
Infrared Technology and Applications XLI
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; Paul R. Norton, Editor(s)