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Proceedings Paper

AIRWATCH: the collection optics
Author(s): David J. Lamb; Russell A. Chipman; John O. Dimmock; Lloyd W. Hillman; Yoshiyuki Takahashi
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Paper Abstract

The Airwatch optical system is shown to have minimal resolution requirements while requiring both a large entrance aperture and a simple configuration. Several single and double element optical systems are discussed, and Fresnel lenses are shown to be a promising candidate for the Airwatch optical system. Design techniques of Fresnel lens systems are presented, and it is shown how complex Fresnel lenses systems can be modeled and analyzed using commercially available ray tracing programs. It is then demonstrated how the performance of the single element system can be improved through the use of a two element configuration. Specifically, focal surface curvature can be eliminated, and the FOV of a single aperture can be increased by switching to the two element design. Techniques for reducing the size of the focal surface are also discussed. Finally, current research efforts involving the construction of prototype Fresnel lens system are explained.

Paper Details

Date Published: 10 November 1998
PDF: 10 pages
Proc. SPIE 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, (10 November 1998); doi: 10.1117/12.330310
Show Author Affiliations
David J. Lamb, Univ. of Alabama in Huntsville (United States)
Russell A. Chipman, Innotech (United States)
John O. Dimmock, Univ. of Alabama in Huntsville (United States)
Lloyd W. Hillman, Univ. of Alabama in Huntsville (United States)
Yoshiyuki Takahashi, Univ. of Alabama in Huntsville (United States)


Published in SPIE Proceedings Vol. 3445:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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