ULTRAFAST PHOTOGRAPHIC LENS Russian patent published in 2020 - IPC G02B9/64 

FIELD: photography.

SUBSTANCE: lens can be used as a photographic lens in mirror-free photographic equipment. Lens comprises three positive components, first and second of which are separated by aperture diaphragm. First component comprises single plane-concave and biconvex lenses, as well as a positive meniscus whose convex surface faces the object space. Second component has a negative two-glued meniscus comprising a negative and a positive meniscus whose concave surfaces face the object space, and a single plane-convex lens. Third component comprises a single convex-flat lens, a positive meniscus whose convex surface faces the object space and a single plane-concave lens.

EFFECT: improved manufacturability by reducing the number of glued lenses and increasing the number of lenses with flat surfaces while maintaining quality characteristics of the image, ultrahigh relative aperture and the value of the linear field of the image.

1 cl, 2 dwg, 1 tbl