MIRROR-LENS TELESCOPE LENS FOR A MICRO-CLASS SPACECRAFT Russian patent published in 2023 - IPC G02B17/08 

FIELD: telescopes.

SUBSTANCE: used in electron-optical telescopes for remote sensing of the Earth. The mirror-lens objective consists of a main axisymmetric concave hyperbolic mirror having a hole in the central zone, a secondary axisymmetric convex hyperbolic mirror and a lens compensator located between the secondary and primary mirrors and consisting of a positive meniscus convexly facing the image plane; the second positive meniscus, concavity facing the image plane; and a concave-flat negative lens with its concavity facing the space of objects.

EFFECT: improved process characteristics for providing highly detailed survey of the Earth's surface in the spectral range of 500-890 nm when placed on board a micro-class spacecraft.

1 cl, 3 dwg, 1 tbl