Optical Performance Requirements for Thermal Imaging Lenses

J. P. Jennings; F. J. Busselle

doi:10.1117/12.948808

2 July 1985 Optical Performance Requirements for Thermal Imaging Lenses

J. P. Jennings, F. J. Busselle

Proceedings Volume 0549, Image Quality: An Overview; (1985) https://doi.org/10.1117/12.948808
Event: 1985 Technical Symposium East, 1985, Arlington, United States

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.

Citation Download Citation

J. P. Jennings and F. J. Busselle "Optical Performance Requirements for Thermal Imaging Lenses", Proc. SPIE 0549, Image Quality: An Overview, (2 July 1985); https://doi.org/10.1117/12.948808

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