AIRWATCH: The collection optics

David J. Lamb, Russell A. Chipman, John O. Dimmock, Lloyd W. Hillman, Yoshiyuki Takahashi

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


The Airwatch optical system is shown to have minimal resolution requirements (when compared to more standard imaging systems) 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 field of view 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 systems are explained.

Original languageEnglish (US)
Pages (from-to)494-504
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1998
EventProceedings of the 1998 Conference on EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX - San Diego, CA, USA
Duration: Jul 22 1998Jul 24 1998

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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