HIGH-APERTURE LENS Russian patent published in 2021 - IPC G02B9/64 

FIELD: optics.

SUBSTANCE: lens can be used as a photographic lens in camera and photographic equipment. High-aperture lens consists of two components separated by an aperture diaphragm. First component is made of a single biconvex lens, a single negative meniscus, facing the object space with its concave side, a single negative lens facing the image space with its concave side, single biconvex lens and a negative meniscus whose convex side faces the object space and glued from the positive and negative meniscus. Second component is made of negative meniscus, facing concavity to object space and glued from biconcave and biconvex lenses, and single biconvex and convex-flat, convexed to object space of lenses.

EFFECT: technical result is improved image quality on field of view, increased rear section and improved manufacturability, as well as reducing the number of used types of optical glass while maintaining high aperture ratio and a linear image field.

5 cl, 2 tbl, 4 dwg