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Proceedings Paper

Measurement of the MTF and MRTD for focal plane arrays
Author(s): Alan H. Lettington; Qi He Hong; John Macdonald; A. Marshall; Kevin St. John Murphy; Paul P. Donohue
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Paper Abstract

The use of focal plane arrays (FPAs) in infrared imaging systems is becoming increasingly important. There are problems, however, in measuring their modulation transfer function (MTF) and their minimum resolvable temperature difference (MRTD) since these performance measures vary with the exposition of the image on the FPA. This limitation has been overcome through the introduction of a discrete MTF for these imaging systems using discrete Fourier transform techniques. This discrete MTF is a unique function of spatial frequency and has been measured using a microscanned discrete line spread function. It has also formed the basis of an objective MRTD, the results of which have been compared with subjective measurements.

Paper Details

Date Published: 31 August 1993
PDF: 8 pages
Proc. SPIE 1969, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV, (31 August 1993); doi: 10.1117/12.154716
Show Author Affiliations
Alan H. Lettington, Univ. of Reading (United Kingdom)
Qi He Hong, Univ. of Reading (United Kingdom)
John Macdonald, Univ. of Reading (United Kingdom)
A. Marshall, Univ. of Reading (United Kingdom)
Kevin St. John Murphy, Defence Research Agency Malvern (United Kingdom)
Paul P. Donohue, Defence Research Agency Malvern (United Kingdom)


Published in SPIE Proceedings Vol. 1969:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV
Gerald C. Holst, Editor(s)

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