SMALL-SIZE HIGH-RESOLUTION CATADIOPTRIC TELESCOPE Russian patent published in 2024 - IPC G02B17/08 

FIELD: optical instrument making.

SUBSTANCE: invention relates to optical instrument making, specifically to high-resolution mirror-lens telescopes, and can be used on small spacecraft for remote probing of the Earth. Telescope consists of arranged in series in the beam path: a lens meniscus, made in the form of an axisymmetric meniscus negative in optical power, whose convexity faces the image plane, main mirror, made in the form of a concave axisymmetric mirror, facing the object space with its concavity and having an opening in the central zone, a secondary mirror in form of a convex axisymmetric mirror facing the image plane with its convexity, and an axially symmetric prefocal lens with negative optical power located behind the top of the main mirror. Meniscus has a cone-shaped hole in the central zone, having a narrowing on the first along the beam surface and widening on the second along the beam surface of the lens meniscus. Prefocal lens is in form of a biconcave lens. For the lens meniscus and the prefocal lens, the same grades of optical glass are used, and the lens meniscus and the secondary mirror are made in the form of separate elements, the secondary mirror being located between the lens meniscus and the main mirror.

EFFECT: reduction of dimensions, improvement of technological characteristics.

1 cl, 3 dwg