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Proceedings Paper

Objective MRTD for focal-plane arrays
Author(s): Alan H. Lettington; Qi He Hong; A. Marshall; Kevin St. John Murphy
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Paper Abstract

An objective method has been developed for measuring the minimum resolvable temperature difference (MRTD) of infrared imaging systems employing focal plane detector arrays. The resulting MRTD is uniquely determined by applying discrete Fourier transform techniques, thus avoiding the previous multi-valued problem associated with the non-isoplanatic property of discrete devices. The derivation is based on sinusoidal wave input targets but a practical measuring procedure has been developed using conventional bar patterns; alternatively the MRTD may be calculated by measuring the MTF using the line spread function. This objective MRTD has also been compared with conventional subjective measurements.

Paper Details

Date Published: 1 November 1993
PDF: 7 pages
Proc. SPIE 2020, Infrared Technology XIX, (1 November 1993);
Show Author Affiliations
Alan H. Lettington, Univ. of Reading (United Kingdom)
Qi He Hong, Univ. of Reading (United Kingdom)
A. Marshall, Univ. of Reading (United Kingdom)
Kevin St. John Murphy, Defence Research Agency Malvern (United Kingdom)

Published in SPIE Proceedings Vol. 2020:
Infrared Technology XIX
Bjorn F. Andresen; Freeman D. Shepherd, Editor(s)

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