Optical hybrid lens, comprising: - a substrate having a first surface and a second surface opposite the first surface, - a sub-wavelength grating lens disposed on the first surface and comprising a plurality of posts (210, 211, 212, 213, 215, 216), - the plurality of posts (210, 211, 212, 213, 215, 216) being arranged on the first surface and extending from the first surface, and a refractive lens arranged on the sub-wavelength grating lens enclosing the plurality of posts (210, 211, 212, 213, 215, 216), or arranged on the second surface; wherein - the refractive lens is designed to have a first focal length being a function of wavelength, - the sub-wavelength grating lens is designed to have a second focal length being a function of wavelength, wherein the wavelength dependency of the second focal length is adjusted to be the inverse of the wavelength dependency of the first focal length, and - wherein the first and second focal length are defined with respect to a range of wavelengths to be transmitted by means of the optical hybrid lens: - wherein the plurality of posts (210, 211, 212, 213, 215, 216) are arranged in a regular two-dimensional and rectangular-shaped lattice and distances between any pair of posts (210, 211, 212, 213, 215, 216), defined as distances between centers of the respective posts, is smaller than half the wavelength of light to be transmitted by the optical hybrid lens, - wherein with respect to one central post, groups of posts from the plurality of posts (210, 211, 212, 213, 215, 216) are arranged around the central post in regular cells (220, 230, 240), - wherein the posts from the plurality of posts (210, 211, 212, 213, 215, 216) arranged in a given regular cell have the same diameter, and - wherein the diameter of posts from different regular cells (220, 230, 240) decreases with respect to the diameter of the central post as a function of distance to the central post, and wherein - a group of cylindrical posts is arranged around the central cylindrical post in a rectangular cell, - a further group of cylindrical posts is arranged in an octagonal cell around the central cylindrical post, and - a last group of cylindrical posts is arranged in another octagonal cell. - a substrate having a first surface and a second surface opposite the first surface, - a sub-wavelength grating lens disposed on the first surface and comprising a plurality of posts (210, 211, 212, 213, 215, 216), - the plurality of posts (210, 211, 212, 213, 215, 216) being arranged on the first surface and extending from the first surface, and a refractive lens arranged on the sub-wavelength grating lens enclosing the plurality of posts (210, 211, 212, 213, 215, 216), or arranged on the second surface; wherein - the refractive lens is designed to have a first focal length being a function of wavelength, - the sub-wavelength grating lens is designed to have a second focal length being a function of wavelength, wherein the wavelength dependency of the second focal length is adjusted to be the inverse of the wavelength dependency of the first focal length, and - wherein the first and second focal length are defined with respect to a range of wavelengths to be transmitted by means of the optical hybrid lens: - wherein the plurality of posts (210, 211, 212, 213, 215, 216) are arranged in a regular two-dimensional and rectangular-shaped lattice and distances between any pair of posts (210, 211, 212, 213, 215, 216), defined as distances between centers of the respective posts, is smaller than half the wavelength of light to be transmitted by the optical hybrid lens, - wherein with respect to one central post, groups of posts from the plurality of posts (210, 211, 212, 213, 215, 216) are arranged around the central post in regular cells (220, 230, 240), - wherein the posts from the plurality of posts (210, 211, 212, 213, 215, 216) arranged in a given regular cell have the same diameter, and - wherein the diameter of posts from different regular cells (220, 230, 240) decreases with respect to the diameter of the central post as a function of distance to the central post, and wherein - wherein the plurality of posts (210, 211, 212, 213, 215, 216) are arranged in a regular two-dimensional and rectangular-shaped lattice and distances between any pair of posts (210, 211, 212, 213, 215, 216), defined as distances between centers of the respective posts, is smaller than half the wavelength of light to be transmitted by the optical hybrid lens, - wherein with respect to one central post, groups of posts from the plurality of posts (210, 211, 212, 213, 215, 216) are arranged around the central post in regular cells (220, 230, 240), - wherein the posts from the plurality of posts (210, 211, 212, 213, 215, 216) arranged in a given regular cell have the same diameter, and - wherein the diameter of posts from different regular cells (220, 230, 240) decreases with respect to the diameter of the central post as a function of distance to the central post, and wherein - a group of cylindrical posts is arranged around the central cylindrical post in a rectangular cell, - a further group of cylindrical posts is arranged in an octagonal cell around the central cylindrical post, and - a last group of cylindrical posts is arranged in another octagonal cell.