Polymeric based lens comprising a hardening layer, an absorbent layer and interferential multi-layer and corresponding manufacturing method

Polymer based lens, comprising:

• a hardening layer;
• an interferential multi-layer,
• wherein, said hardening layer is at least 500 nm thick and said interferential multi-layer is made up of a plurality of sublayers where each of said sublayers is less than 250 nm thick;
• an absorbent layer sandwiched between said hardening layer and said interferential multi-layer,
• wherein said absorbent layer is between 10 nm and 1500 nm thick and is selected from the group consisting of metals, metal oxides and metal nitrides that are suitable for producing a transparent layer in the visible spectrum via deposition by sputtering,
• wherein said absorbent layer includes cations of a coloring metal selected from the group consisting of transition elements which, in oxided form, have a cation that absorbs electromagnetic radiation in the visible spectrum,
• wherein said coloring metal cations are in a proportion between 10% and 70% atomic percentage of the cations with respect to the cation of the predominant metal in said absorbent layer, except:
• (i) in the case where said absorbent layer is made from TiO2 and said coloring metal cations are Si cations, where said Si cations are in a proportion between 11.5% and 16.5% atomic percentage of the cations,
• (ii) in the case where the absorbent layer is made from SiO2 and the coloring metal cations are Mn cations, where the Mn cations are in a proportion between 37.5% y and 42.5% atomic percentage of the cations,
• (iii) in the case where the absorbent layer is made from SiO2 and the coloring metal cations are Cr cations, where the Cr cations are in a proportion between 47.5% and 52.5% atomic percentage of the cations, and
• (iv) in the case where the absorbent layer is made from Cr2O3 and the coloring metal cations are Si cations, wherein the Si cations are in a proportion between 47.5% and 52.5% atomic percentage of the cations.