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Proceedings Paper

Electromagnetics and orbital mechanics of a Sun occulting screen
Author(s): Richard R. Zito
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Paper Abstract

The concept of a Sun occulting screen alows a large space telescope to be shielded from solar UV, visible, and IR radiation. Telescope operation in the screen's shadow reduces background radiation from scattering off telescope structures, and reduces expansion and contraction of the telescopes physical dimensions due to changes in solar heating. It is possible to design a non-conducting Sun occulting screen that travels in tandem with a large space telescope such that both the screen and the telescope travel in Sun synchronous orbits that do not cross. The constant separation distance between the screen and the telescope is on the order of 10 Km (far enough from the screen to minimize any radiated IR from the warm screen). The focus of the space telescope's elliptical (or circular) orbit lies at the Earth's center. However, the focus of the screen's orbit will lie at a point displaced toward the Sun, from the Earth's center, by the screen/telescope separation distance. It will be shown that by passing a small photoelectric current through a few turns of wire surrounding the screen, a Lorentz force can be generated that is sufficient to maintain the position of the screen's shifted orbital focal point.

Paper Details

Date Published: 30 January 2004
PDF: 17 pages
Proc. SPIE 5166, UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts, (30 January 2004); doi: 10.1117/12.500122
Show Author Affiliations
Richard R. Zito, Richard R. Zito R & D Corp. (United States)

Published in SPIE Proceedings Vol. 5166:
UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts
Howard A. MacEwen, Editor(s)

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