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Proceedings Paper

Nonlinearity and nonuniformity corrections for the IRIS family of IRCCD thermal imagers
Author(s): Michel Broekaert; Bruno Noel du Payrat
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Paper Abstract

New generation IRCCD focal plane arrays have pixel noise levels near BLIP performance. However, nonuniformities, nonlinearities, and 1/f noise can be limiting factors that affect the final performance of the system. The spatial noise introduced by these phenomena can be several tens of times greater than the temporal noise. Depending on the applications, the requirement to reduce the spatial noise below the temporal noise is always the same, but the dynamic range required by the system can lead to the selection of different means of nonuniformity correction. In the first section of this paper, we analyze the measurements of detectivities, nonlinearities, and 1/f noise for typical linear arrays of 288 X 4 elements used in the IRIS thermal imagers family. In the last section, results are presented about nonuniformity corrections, 1/f noise reduction by continuous updating of correction coefficients, two-point dynamic correction, nonlinear correction, and scene-based correction.

Paper Details

Date Published: 17 October 1994
PDF: 17 pages
Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); doi: 10.1117/12.188665
Show Author Affiliations
Michel Broekaert, SAGEM (France)
Bruno Noel du Payrat, SAGEM (France)

Published in SPIE Proceedings Vol. 2269:
Infrared Technology XX
Bjorn F. Andresen, Editor(s)

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