Zone-plate earth-space telescope (ZPEST)

Details Zone-plate earth-space telescope (ZPEST) Zone-plate earth-space telescope (ZPEST)

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aiaa.conf...96v&link_type=abstract

IN: 1992 AIAA/AAS Astrodynamics Conference, Hilton Head Island, SC, Aug. 10-12, 1992, Technical Papers (A92-52051 22-13). Washin

Physics

Optics

Earth Surface, Faint Objects, High Resolution, Lenses, Spaceborne Telescopes, Elliptical Orbits, Focal Plane Devices, Geometrical Optics, Mirrors, Satellite Orbits

Scientific paper

The purpose of this paper is to present the concept of gargantuan telescopes, that are so long that the objective is located in space, while the focus is on the earth's surface. A wide variety of relevant topics is covered, including objective lense orbits and stabilization; theory and use of simple Zone-Plates as objective lenses; and limitations. The resulting hybrid telescopes combine the very high resolution of space telescopes with the relatively low cost of ground-based observatories. Resolution on the order of milli-arc seconds are feasible with ZPEST. The only difficulties are in observations of faint objects and the fact that ZPEST is not easily aimable. Still, ZPEST fills an interesting telescope niche, with low cost, high resolution observations.

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