OBJECTIVE OF A MIRROR-LENS TELESCOPE Russian patent published in 2022 - IPC G02B17/08 

FIELD: telescopic systems.

SUBSTANCE: invention can be used as a lens for telescopic systems for astronomical and other visual observations, photo and video recording. The lens is made of optically interconnected and located along the beam of the main parabolic mirror, a secondary flat mirror located at an angle of 45 degrees to the optical axis of the main parabolic mirror, and a lens field corrector located behind the focal plane of the main parabolic mirror. The lens field corrector contains a meniscus sequentially located and separated by air gaps, with its concave surface facing the focus of the main mirror, a biconvex lens, a biconcave lens, two biconvex lenses and a negative meniscus, with its convex surface facing the equivalent focus of the telescopic system objective.

EFFECT: increase in image contrast and relative aperture, decrease in overall length and increase in the angular field of view while maintaining high image quality and without additional shielding of the entrance pupil of the lens.

1 cl, 5 dwg