US 2003/0169493 A1 · COMPACT TELESCOPE

Abstract

A compact telescope having a modified Gregorian design comprising three reflecting surfaces. The first reflecting surface is concave and is defined by an outer perimeter and an inner perimeter. The curvature of the first reflecting surface defines a focal plane of the first reflecting surface. The second reflecting surface is optically coupled to the first reflecting surface and is disposed between the first reflecting surface and the focal plane defined by the first reflecting surface. The third reflecting surface is concave and is disposed within the inner perimeter of the first reflecting surface. The curvature of the third reflecting surface is greater than the curvature of the first reflecting surface. The third reflecting surface is optically coupled to the first reflecting surface by the second reflecting surface. An aperture is disposed within the third reflecting surface. Thus light incident upon the first reflecting surface is directed through the aperture.

Claims25

Dependent claims

A compact telescope comprising:

a concave first reflecting surface having an inner perimeter and an outer perimeter, the curvature of the first reflecting surface defining a focal plane of the first reflecting surface;
a second reflecting surface optically coupled to the first reflecting surface and disposed between the first reflecting surface and the focal plane of the first reflecting surface;
and
a concave third reflecting surface disposed within the inner perimeter of the first reflecting surface and optically coupled to the first reflecting surface by the second reflecting surface, the third reflecting surface including an aperture, wherein the curvature of the third reflecting surface is greater than the curvature of the first reflecting surface.

1 more element

Dependencies are inferred from the claim text.

Compact telescope

Life of this patent

Compact telescope

Life of this patent

Abstract

Claims25