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Proceedings Paper

Optical Performance Requirements for Thermal Imaging Lenses
Author(s): J. P. Jennings; F. J. Busselle
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Paper Abstract

In recent years the quality of infra-red lenses has improved considerably. Deficiencies due to manufacturing errors and lack of readily available test equipment have been reduced, and lenses are now being made which are consistently close to diffraction limit. Now that the optics are not the limiting factor in a thermal imaging (TI) system, it is possible to consider what relaxations may be permitted to reduce optical costs without compromising TI system performance. As a first step in this consideration, this paper describes initially experiments concerning the subjective effects of using TI systems with degraded optics. We then describe experiments both in the laboratory and also in the field to quantify these subjective effects, and methods of MTF measurement on complete thermal imagers are then given. Finally some results and conclusions from these experiments are presented.

Paper Details

Date Published: 2 July 1985
PDF: 7 pages
Proc. SPIE 0549, Image Quality: An Overview, (2 July 1985); doi: 10.1117/12.948808
Show Author Affiliations
J. P. Jennings, Royal Armament Research and Development Establishment (UK)
F. J. Busselle, Royal Armament Research and Development Establishment (UK)

Published in SPIE Proceedings Vol. 0549:
Image Quality: An Overview
Lionel R. Baker; Edward M. Granger, Editor(s)

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