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							Issue
					</th>
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<div>
											MATEC Web Conf.
									</div>
<div><strong>Volume </strong>417, 2025				</div>
				
					                2025 RAPDASA-RobMech-PRASA-AMI Conference: Bridging the Gap between Industry &amp; Academia - The 26<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> Annual International RAPDASA Conference, joined by RobMech, PRASA and AMI, co-hosted by CSIR and Tshwane University of Technology, Pretoria
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<tr><td class="sep_issue" colspan="3"></td></tr>
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<th>
					Article Number
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<td></td>
<td>05004</td>
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<th>
					Number of page(s)
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<td></td>
<td>17</td>
</tr>
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<th>Section</th>
<td></td>
<td>Process Development</td>
</tr>
<tr>
<th>DOI</th>
<td></td>
<td>
<a href="https://doi.org/10.1051/matecconf/202541705004">
					https://doi.org/10.1051/matecconf/202541705004
				</a>
</td>
</tr>
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<th>Published online</th>
<td></td>
<td>
				25 November 2025
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## Characterizing the spatial non-uniformity and temporal stability of QWIP and T2SL cooled infrared detector focal plane arrays

Waldo van der Westhuisen, Mathews Chirindo* and Josiah Jideani

Council for Scientific and Industrial Research, Manufacturing Cluster, South Africa

* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

Fixed pattern and temporal noise in infrared Focal Plane Arrays are inherent in the technology and must be corrected to achieve optimal performance in optical gas imaging. These noise sources are intrinsic to the manufacturing process of these devices and the read-out electronics. This paper presents the characteristics of these noise sources for Type 2 Superlattice and Quantum Well Infrared Photodetectors. Experimental results visualise the raw uncorrected non-uniformity of the respective focal plane arrays along with their gain and offset correction tables. The Quantum Well Infrared Photodetector (Sulphur Hexafluoride) shows better uniformity in the uncorrected frames than the Type 2 Superlattice (Volatile Organic Compound), but both detectors show similar performance after correction. The corrected frames are evaluated and a quantity, the absolute median residual per frame, is presented to quantify the residual non-uniformity after correction. Results show that the standard 2-point NUC is effective at correcting the non-uniformity with low levels of remaining noise.

© The Authors, published by EDP Sciences, 2025

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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