Optical article and process for producing the same

1. A process for producing an optical article having an antireflection layer formed directly or via another layer on an optical base material, comprising:

forming a primary layer contained in the antireflection layer; and

forming a light transmissive conductive layer containing a compound of germanium and a transition metal on a surface of the primary layer.

2. The process for producing an optical article according to claim 1 , wherein the formation of the conductive layer includes vapor of at least any one of germanium, a transition metal which forms the compound, and the compound on the surface of the primary layer.

3. The process for producing an optical article according to claim 1 , wherein

the primary layer is a layer containing a transition metal capable of forming the compound with germanium; and

the formation of the conductive layer includes driving germanium into the surface of the primary layer.

4. The process for producing an optical article according to claim 1 , wherein

the antireflection layer is a multilayer film containing the primary layer; and

the process further comprises forming another layer of the multilayer film by superimposing it on the conductive layer.

5. The process for producing an optical article according to claim 1 , further comprising forming an antifouling layer directly or via another layer on the primary layer having the conductive layer formed on the surface thereof.

6. The process for producing an optical article according to claim 1 , wherein the compound of germanium and the transition metal is germanide.

7. An optical article comprising:

an optical base material;

an antireflection layer formed directly or via another layer on the optical base material; and

a light transmissive conductive layer which contains a compound of germanium and a transition metal and is formed on a surface of a primary layer contained in the antireflection layer.

8. The optical article according to claim 7 , wherein the antireflection layer is a multilayer film, and the primary layer is one of the layers constituting the multilayer film.

9. The optical article according to claim 7 , wherein the primary layer is a layer containing a transition metal capable of forming the compound with germanium.

10. The optical article according to claim 7 , further comprising an antifouling layer formed directly or via another layer on the primary layer having the conductive layer formed on the surface thereof.

11. The optical article according to claim 7 , wherein the optical base material is a plastic lens base material.

12. A pair of spectacles, comprising:

spectacle lenses; and

a frame into which the spectacle lenses are fitted, wherein

the spectacle lenses are the optical articles according to claim 11 .

13. A system, comprising:

the optical article according to claim 7 ; and

a device that projects and/or picks up an image through the optical article.

14. A system comprising:

the optical article according to claim 7 ; and

a medium accessible through the optical article.

15. The optical article according to claim 7 , wherein the compound of germanium and the transition metal is germanide.