WIDE-ANGLE ORTHOSCOPIC LENS Russian patent published in 2020 - IPC G02B9/58 G02B11/26 

FIELD: optics.

SUBSTANCE: lens is intended for use as a photographic lens in mirror-free cameras. Wide-angle orthoscopic lens comprises two components separated by an aperture diaphragm. First component is positive and contains successively a single negative meniscus whose convex surface faces the object space, and a positive doublet glued from a biconvex and biconcave lenses. Second component is positive and contains a positive doublet glued from a biconcave and biconvex lens, and a single negative meniscus whose concave side faces the object space.

EFFECT: technical result is improvement of quality of image on field of view and improved manufacturability while maintaining value of relative hole and linear field of image.

1 cl, 2 dwg, 1 tbl