Investigation on the correction for the cooling nonuniformity of IR detector arrays

Jianxun Zhou; Dianxiu Wei; Shicai Liu; Baomin Zhang

doi:10.1117/12.142036

1 April 1993 Investigation on the correction for the cooling nonuniformity of IR detector arrays

Jianxun Zhou, Dianxiu Wei, Shicai Liu, Baomin Zhang

Proceedings Volume 1982, Photoelectronic Detection and Imaging: Technology and Applications '93; (1993) https://doi.org/10.1117/12.142036
Event: Photoelectronic Detection and Imaging: Technology and Applications '93, 1993, Beijing, China

Abstract

In this paper we have deduced the theoretical formulae which describe the correction of detectivity nonuniformity introduced by cooling -- nonuniformity of the detector array, and we point out that the fixed pattern noise arising from the difference of D^* may be corrected by amending the magnification of each detector element respectively. However, the color noise relating spectrum distribution of input image and spectrum detectivity nonuniformity of the detector element cannot be corrected by a similar method. According to the varying tendency of D^* ((lambda) , T) in different temperature, we have explored the method of the cut-off filter, which makes use of the linear relation between D^* ((lambda) , T) and T in certain spectrum range, and the probability of removing color noise arising from cooling nonuniformity. We have also analyzed the characteristic of this method and its limitation of practical applicability.

Citation Download Citation

Jianxun Zhou, Dianxiu Wei, Shicai Liu, and Baomin Zhang "Investigation on the correction for the cooling nonuniformity of IR detector arrays", Proc. SPIE 1982, Photoelectronic Detection and Imaging: Technology and Applications '93, (1 April 1993); https://doi.org/10.1117/12.142036

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