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Proceedings Paper

Enhancement of point-source targets in an IR staring FPA sensor
Author(s): Patrice Bolduc; Jean Fortin; Paul C. Chevrette; Andre Zaccarin
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Paper Abstract

This paper describes the results of experiments that were conducted in order to characterize the types of noise limiting the performance of an amber InSb charge injection device focal plane array (3-5 microns) of 256 by 256 pixels. This is part of the work done at the Defense Research Establishment Valcartier to develop a wide-area-coverage infrared surveillance system. The emphasis is put on the analysis of the postcorrection spatial noise that reduces the array sensitivity to weak point-source targets. This residual noise limits the improvement provided by an increased array integration time. Furthermore, the results show that a temporal low frequency noise component has a more severe effect than detector nonlinearities. However, this problem can be partly resolved with a periodic offset compensation obtained by reference image subtraction. The reference image is acquired when the blade of a flat black chopper wheel completely blocks the aperture of the camera. The chopper wheel is synchronized on the acquisition process. Results show that this compensation method can efficiently reduce the low frequency noise level and enhance point-source target detection.

Paper Details

Date Published: 10 June 1996
PDF: 9 pages
Proc. SPIE 2743, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VII, (10 June 1996); doi: 10.1117/12.241953
Show Author Affiliations
Patrice Bolduc, Univ. Laval (Canada)
Jean Fortin, ProConcept Enr. (Canada)
Paul C. Chevrette, Defense Research Establishment Valcartier (Canada)
Andre Zaccarin, Univ. Laval (Canada)


Published in SPIE Proceedings Vol. 2743:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VII
Gerald C. Holst, Editor(s)

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