All-reflective relayed focal telescope derived from the first two mirrors of an afocal three-mirror anastigmat
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United States of America Patent
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Apr 23, 2013
Grant Date -
Apr 14, 2011
app pub date -
Oct 12, 2009
filing date -
Oct 12, 2009
priority date (Note) -
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Abstract
An optical system includes a primary mirror of a positive-powered concave substantially paraboloidal configuration configured to reflect light incident thereupon; a secondary mirror of a negative-powered convex hyperboloidal configuration facing the primary mirror configured to receive the light reflected from the primary mirror and redirect the light reflected from the primary mirror; a positive-powered tertiary mirror configured to substantially reimage and reflect divergent light rays incident from the secondary mirror; and a powered quaternary mirror configured to receive the reimaged light rays from the tertiary mirror, and to relay the received reimaged light rays to a focal point.
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