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Proceedings Paper

Compact dual field of view SWIR/MWIR optical system
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Paper Abstract

This paper discusses the design and development of a dual field of view, all-refractive infrared optical system that images the mid-wave infrared (MWIR) light in one field of view and the short wave infrared (SWIR) light in the narrower second field of view onto the same detector. The narrow field of view images the SWIR radiation at a slow f/number of 10.0, while the wide field of view images the MWIR radiation at f/1.9. The field of view is changed via a single lens that changes its axial position within the lens, resulting in an axial zoom and an overall magnification change of 6X. The change in focal length and f/number at the same time enables an increased focal length without having to increase the aperture size by the ratio of the focal length change. The large field of view change is achieved by both the motion of the lens, and the use of the spectral properties of the materials that change with wavelength. The change in spectral bands is accomplished via the use of a spectral filter wheel.

Paper Details

Date Published: 21 May 2011
PDF: 10 pages
Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 801225 (21 May 2011); doi: 10.1117/12.888097
Show Author Affiliations
Jay N. Vizgaitis, U.S. Army Night Vision & Electronic Sensors Directorate (United States)
Kyle Witte, U.S. Army Night Vision & Electronic Sensors Directorate (United States)
Roy Littleton, U.S. Army Night Vision & Electronic Sensors Directorate (United States)
Philip Perconti, U.S. Army Night Vision & Electronic Sensors Directorate (United States)


Published in SPIE Proceedings Vol. 8012:
Infrared Technology and Applications XXXVII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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