Catadioptric telescope with a square image

摘要

FIELD: physics.;SUBSTANCE: telescope has a concave main mirror in form of a symmetrical part of a parabolic cylinder put into parabolic guides lying along the edges of the said cylinder. The guides are enclosed in a rigid frame made from links joining the edges of the guides and linked to each other on the top and bottom edges of the focal line by links. On the faces of the main mirror there are shelves made from rigid material and which pass on the top edges of the guides and the said links. In the region of the focal line of the main mirror, along the mirror, there is a first collimating lens in form of convex-concave lens. Behind it there is a second parabolic reflector in form of a narrow band. At the centre of the first lens on its axis of symmetry in the focal region of the second reflector there is a second convex-concave collimating lens which is a square in the plan view. On the optical axis of the second collimating lens an on the axis of symmetry of the cylinder there is a through-opening behind which an image receiver is fitted. Between the second lens and the through-opening there is a channel made in form of a box with a square section with opaque walls.;EFFECT: simple design, reduced weight and easy assembling.;3 dwg