CATADIOPTRIC LENS Russian patent published in 2022 - IPC G02B17/08 G02B23/02 

FIELD: optics.

SUBSTANCE: invention can be used in space-based telescopes for remote probing of the Earth in the infrared region of the spectrum. Catadioptric lens comprises a mirror lens consisting of a main concave hyperbolic mirror and a convex hyperbolic mirror, a lens projection lens with an optical axis aligned with the optical axis of the mirror lens. In the plane of the intermediate image created by the mirror lens, a collective is installed in the form of a biconcave lens, and in the plane of its image there is an optoelectronic receiver. Lens projection lens is made of two components. Optical power of the lenses satisfies the conditions specified in the claims. Lens is supplemented with a cryostat, and the exit pupil of the lens is aligned with the cryostat window and is located at a distance from the optoelectronic receiver of not more than 0.01÷0.02f'.

EFFECT: high resolution by reducing aberrations in the pupils and increasing aperture ratio and angular field.

1 cl, 2 dwg