WIDE ANGLE TELEVISION LENS Russian patent published in 2023 - IPC G02B9/64 G02B13/18 

FIELD: lenses.

SUBSTANCE: lens consists of three components and an aperture diaphragm. The first component contains four single lenses: the first is meniscus-shaped with an aspherical convex surface, located with a concave surface to the image plane, the second is biconcave, the third is a meniscus, located with a concave surface to the object space, the fourth is an aspherical biconvex, located with an aspherical surface to the object space. The second component consists of two biconvex and biconcave lenses glued in pairs, located with a concave surface to the image plane. The third component is a meniscus with an aspherical concave surface directed towards the image plane. The optical powers of the components are: (0.17-0.56)φ'_ls, (-0.07-0.26)φ'_ls, (0.028-0.47)φ'_ls respectively, where φ'_ls is the optical power of the lens.

EFFECT: increased relative aperture, field of view and improved image quality.

4 cl, 4 dwg, 3 tbl