Ring telescope system
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United States of America Patent
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Apr 27, 2004
Grant Date -
Jul 10, 2003
app pub date -
Jun 21, 2002
filing date -
Jan 9, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
.lambda.UVt sampling is employed to achieve high resolution imagery without sub-wavelength system tolerances. An exemplary application is a 20 meter outside diameter orbiting, earth-watching ring telescope utilizing 40 identical commercial, off-the-shelf (COTS)-grade convex primary mirrors of 80 cm diameter each. Its nominal orbit is geosynchronous, with a designed ground resolution of approximately 1 m at 500 nm. It is configured such that there is no macro-structure pointing, where the primary mirrors are solely responsible for gross target pointing and no phasing whatsoever. The overall wavefront error budget is on the order of .lambda. or even worse, rather than the more traditional .lambda./10.
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