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US 4,101,195 AGranted
Anastigmatic three-mirror telescope
OwnerRobert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Dietrich G. Korschinventors
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Abstract
A three-mirror telescope having an ellipsoidal primary mirror, a hyperbolic secondary mirror, and an ellipsoidal tertiary mirror, with the three producing an image in a conveniently located finite plane for viewing.
Claims4
A three-mirror telescope comprising:
- a primary mirror of ellipsoidal configuration, and having an opening central about a central axis thereof;
- a secondary mirror of hyperboloidal configuration facing said primary mirror, said secondary mirror being of a smaller diameter than the primary mirror and positioned symmetrically with the axis of the primary mirror, whereby light from a scene being viewed passes around and by the secondary mirror, and then is reflected through said opening in said primary mirror;
- and
- imaging means, including a tertiary mirror of ellipsoidal configuration positioned to receive light from said secondary mirror, for reflecting an image of the scene being viewed to a plane for viewing.
1 more element
Dependencies are inferred from the claim text.