Optical Designs Of Special Interest In The I-R

James G. Baker

doi:10.1117/12.956762

12 December 1978 Optical Designs Of Special Interest In The I-R

James G. Baker

Proceedings Volume 0156, Modern Utilization of Infrared Technology IV; (1978) https://doi.org/10.1117/12.956762
Event: 22nd Annual Technical Symposium, 1978, San Diego, United States

Abstract

Some of the familiar Rinds of optical designs for the visual region of the spectrum take on new meaning when applied to infra-red problems. The availability of high indices of refraction, for example, accentuates by-ways of optical design in the visual into quite u -usual results in the infrared. As a first example, the Rbsch combination of catadioptric system derived from the Schmidt telescope leads to a kind of wide-field system of low a perture-ratio and low obscuration, although at a sacrifice of compactness. In another such instance, it is feasible to design an optical system in the I-R that can illuminate some appropriate form of detector from a major fraction of a 4-pi solid angle over a field of view of appreciable size. Similarly, it is possible to design a form of retro-reflector for the I-R that has a 4-pi field of view, as for the Luneberg sphere. Further examples of special design for the infrared are discussed, including all-refractive, all-reflective and catadioptric combinations. The author reviews some of these useful facets of optical design where appropriate infrared materials can be employed and suggests how some of these forms may be applied to infra-red problems.

Citation Download Citation

James G. Baker "Optical Designs Of Special Interest In The I-R", Proc. SPIE 0156, Modern Utilization of Infrared Technology IV, (12 December 1978); https://doi.org/10.1117/12.956762

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