FISH EYE LENS TYPE Russian patent published in 2017 - IPC G02B9/62 G02B13/06 

FIELD: physics.

SUBSTANCE: lens consists of two optical components. The first component consists of a single negative meniscus along the beam, a single plano-concave meniscus facing concave surfaces to the image plane, a glued lens consisting of a plano-convex lens along the beam and a biconcave meniscus, and a biconvex single lens. The second component consists of a positive lens along the beam, glued of the biconcave and biconvex lenses and facing the image plane with its convex surface, and a biconvex single lens. The relations, indicated in the invention formula, are performed for the refractive index of the optical lens materials.

EFFECT: increasing the relations of the posterior segment to the focal length of more than 4-volumes, which will allow to use a lens with SLR cameras, and increasing manufacturability.

2 dwg, 2 tbl