A lens having an optical axis, the lens comprising: - a first part in the form of a spherical cap of a first sphere with a first radius r 0, and - a second part in the form of a spherical segment of a second sphere with a second radius r j, wherein r j is equal to or larger than r 0, and wherein the centers of the first sphere and the second sphere coincide in a point on the optical axis, wherein the second part has a top side facing towards the first part and a base side facing away from the first part, wherein the base side comprises a plurality of concentric sections, each section having a first surface that faces away from the optical axis and a second surface that faces towards the optical axis, wherein each first surface has the form of a spherical zone of a third sphere with a center that coincides with the point, wherein, for each section, the first surface and the second surface have a common circular base edge located in a first plane at the base side of the second part, and wherein the second part is configured to transmit at least one light wave of the light waves received by the first part and to project the at least one light wave via the plurality of concentric sections onto a second plane parallel to the first plane. - a first part in the form of a spherical cap of a first sphere with a first radius r 0, and - a second part in the form of a spherical segment of a second sphere with a second radius r j, wherein r j is equal to or larger than r 0, and wherein the centers of the first sphere and the second sphere coincide in a point on the optical axis, wherein the second part has a top side facing towards the first part and a base side facing away from the first part, wherein the base side comprises a plurality of concentric sections, each section having a first surface that faces away from the optical axis and a second surface that faces towards the optical axis, wherein each first surface has the form of a spherical zone of a third sphere with a center that coincides with the point, wherein, for each section, the first surface and the second surface have a common circular base edge located in a first plane at the base side of the second part, and wherein the second part is configured to transmit at least one light wave of the light waves received by the first part and to project the at least one light wave via the plurality of concentric sections onto a second plane parallel to the first plane. wherein r j is equal to or larger than r 0, and wherein the centers of the first sphere and the second sphere coincide in a point on the optical axis, wherein the second part has a top side facing towards the first part and a base side facing away from the first part, wherein the base side comprises a plurality of concentric sections, each section having a first surface that faces away from the optical axis and a second surface that faces towards the optical axis, wherein each first surface has the form of a spherical zone of a third sphere with a center that coincides with the point, wherein, for each section, the first surface and the second surface have a common circular base edge located in a first plane at the base side of the second part, and wherein the second part is configured to transmit at least one light wave of the light waves received by the first part and to project the at least one light wave via the plurality of concentric sections onto a second plane parallel to the first plane.