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Proceedings Paper

Reporting NETD: why measurement techniques matter
Author(s): Ryan K. Rogers; W. Derrik Edwards; Caleb E. Waddle; Christopher L. Dobbins; Sam B. Wood
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Paper Abstract

For over 30 years, the U.S. Army Aviation and Missile Research, Development, and Engineering Center (AMRDEC) has specialized in characterizing the performance of infrared (IR) imaging systems in the laboratory and field. In the late 90’s, AMRDEC developed the Automated IR Sensor Test Facility (AISTF) which allowed efficient deployment testing of aviation and missile IR sensor systems. More recently, AMRDEC has tested many uncooled infrared (UCIR) sensor systems that have size, weight, power, and cost (SWAPC) benefits for certain fielded U.S. Army imaging systems. To compensate for relatively poor detector sensitivities, most UCIR systems operate with very fast focal ratio or F-number (f/#) optics. AMRDEC has recently found that measuring the Noise Equivalent Temperature Difference (NETD) with traditional techniques used with cooled infrared systems produce biased results when applied to systems with faster f/# values or obscurations. Additionally, in order to compare these camera cores or sensor systems to one another, it is imperative to scale the NETD values for f/#, focus distance, and waveband differences accurately. This paper will outline proper measurement techniques to report UCIR camera core and system-level NETD, as well as demonstrate methods to scale the metric for these differences.

Paper Details

Date Published: 9 June 2014
PDF: 18 pages
Proc. SPIE 9071, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXV, 90710T (9 June 2014); doi: 10.1117/12.2050559
Show Author Affiliations
Ryan K. Rogers, Dynetics, Inc. (United States)
W. Derrik Edwards, Dynetics, Inc. (United States)
Caleb E. Waddle, U.S. Army, Aviation and Missile Research, Development, and Engineering Ctr. (United States)
Christopher L. Dobbins, U.S. Army, Aviation and Missile Research, Development, and Engineering Ctr. (United States)
Sam B. Wood, U.S. Army, Aviation and Missile Research, Development, and Engineering Ctr. (United States)


Published in SPIE Proceedings Vol. 9071:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXV
Gerald C. Holst; Keith A. Krapels; Gary H. Ballard; James A. Buford; R. Lee Murrer, Editor(s)

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