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Proceedings Paper

Optical design study for the 1-5 µm spectral band
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Paper Abstract

The increased desire for multispectral infrared optical systems in compact packages significantly complicates the optical design of such systems. Add in the fact that multiple spectral bands are now imaging on the same detector, and the optical designs become quite challenging. The availability of materials over the desired multiple spectral bands that transmit well with the desired dispersion properties further complicates the design. Designing optics for good performance in the SWIR (1.0 - 2.0μm) and the MWIR (3.5 - 5.0μm) bands is an example where this challenge can be significant. Many of the preferred optical materials in the MWIR start to cut off prior to reaching 1μm, or have dispersions that are very difficult to control over this broad of a spectral band. Reflective designs are often limited because of packaging limitations. In this paper, multiple approaches are designed and examined to find the best balance between risk, performance, and size. The analyzed design studies include the use of traditional MWIR materials, harmonic diffractive lenses, and alternative materials that will require further development to be used in a tactical environment.

Paper Details

Date Published: 6 May 2009
PDF: 12 pages
Proc. SPIE 7298, Infrared Technology and Applications XXXV, 729810 (6 May 2009); doi: 10.1117/12.819848
Show Author Affiliations
Miguel P. Snyder, U.S. Army Night Vision & Electronic Sensors Directorate (United States)
Jay N. Vizgaitis, U.S. Army Night Vision & Electronic Sensors Directorate (United States)

Published in SPIE Proceedings Vol. 7298:
Infrared Technology and Applications XXXV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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