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Proceedings Paper

Output accuracy and resolution limitations in resistor array infrared scene projection systems
Author(s): Alan P. Pritchard; Mark A. Venables; David W. Gough
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Paper Abstract

There is a growing demand for high complexity infra-red scene projector devices with improved output accuracy and resolution. Sources of inaccuracies and limitations to resolution are discussed for both projector-alone and projector-in-simulation situations. Using experience of existing system design and performance, an attempt has been made to assign realistic percentage inaccuracy figures to the various relevant effects so that a perspective can be gained of their relative importance. Schemes for improving the accuracy and resolution performance are considered, both in terms of system techniques and array device design. A revised order of relative importance is presented to assess the residual accuracy perspective after application of practicable corrective measures. We conclude that the absolute accuracy to which a unit- under-test's collected input can be relied upon under all conditions is only 90 - 95%. However, it is essential to cater for a much finer output resolution than would be deciduate by the absolute accuracy figure, although it seems doubtful that the requirements of 12 bit resolution could be obtained except in very restricted simulation/scene conditions.

Paper Details

Date Published: 17 June 1996
PDF: 10 pages
Proc. SPIE 2742, Targets and Backgrounds: Characterization and Representation II, (17 June 1996); doi: 10.1117/12.242997
Show Author Affiliations
Alan P. Pritchard, British Aerospace Sowerby Research Ctr. (United Kingdom)
Mark A. Venables, British Aerospace Sowerby Research Ctr. (United Kingdom)
David W. Gough, British Aerospace Sowerby Research Ctr. (United Kingdom)

Published in SPIE Proceedings Vol. 2742:
Targets and Backgrounds: Characterization and Representation II
Wendell R. Watkins; Dieter Clement, Editor(s)

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