Optical article including a layer siox as main component and manufacturing method of the same
An optical article including a layer that has SiOx as a main component and is formed on an optical substrate, directly or with at least one different layer interposed between the layer and the optical substrate, a surface of the layer, which is in the opposite side to the optical substrate, being nitrided.
1. A plastic spectacle lens comprising a layer that has SiO x as a main component and is formed on an optical substrate, directly or with at least one different layer interposed between the layer and the optical substrate, a surface of the layer, which is in the opposite side to the optical substrate, being nitrided, where x>0;
wherein a part of the layer that is nitrided is thinner than a rest of the layer; and
wherein the surface that is nitrided includes nitrogen and silicon;
wherein:
the layer comprises an anti-reflection layer formed on the optical substrate, directly or with at least one different layer interposed between the anti-reflection layer and the optical substrate, and
the anti-reflection layer includes a plurality of sub-layers, and at least the outermost sub-layer of the plurality of sub-layers includes the nitrided surface.
2. The plastic spectacle lens according to claim 1 , wherein the nitrided surface has a composition of Si s O t N u , where, s>0, t≧0, and u>0.
3. The plastic spectacle lens according to claim 1 , wherein:
the optical article layer further comprises an anti-smudge layer directly formed on the antireflection layer, and
at least one of the plurality of sub-layers, except the outermost sub-layer of the anti-reflection layer, includes the nitrided surface.
4. The plastic spectacle lens according to claim 3 , wherein the anti-reflection layer includes a plurality of low refractive index sub-layers and at least one high refractive index sub-layer interposed between the plurality of low refractive index sub-layers, one of the plurality of low refractive index sub-layers is the outermost sub-layer, and at least one of the plurality of low refractive index sub-layers includes the nitrided surface.
5. The plastic spectacle lens according to claim 1 , wherein:
the part of the layer that is nitrided is a thin surface such that performance of the anti-reflection layer is substantially unaffected by the part of the layer that is nitrided.