SPECTACLE LENS AND METHOD FOR PRODUCING THE SAME

• US 20090257022A1
• Filed: 04/29/2009
• Published: 10/15/2009
• Est. Priority Date: 10/31/2006
• Status: Active Grant

• Current Assignee: Nikon-Essilor Co., Ltd.
• Original Assignee: Nikon-Essilor Co., Ltd.
• Inventors: Uekusa, Hidemoto, Ali, Fazlat, ABE, Osamu
• Granted Patent: US 7,954,944 B2
• Time in Patent Office: Days
• US Class Current: 351/166
• CPC Class Codes: G02B 1/105 Protective coatings
• CPC Class Codes: G02B 1/115 Multilayers
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02B 25/001 Eyepieces
• CPC Class Codes: G02B 27/0006 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation G02B1/18 takes precedence; cleaning in general B08B
• CPC Class Codes: G02C 7/02 Lenses; Lens systems ; Methods of designing lenses
• CPC Class Codes: G02C 7/061 Spectacle lenses with progressively varying focal power

Abstract

The disclosure relates to a spectacle lens comprising: a lens base member; a multi-layered anti-reflection film placed on the lens base member, and including a layer mainly made of silicon dioxide as an outermost layer; and a water-and-oil repellent layer provided in contact with the outermost layer of the multi-layered anti-reflection film, and made by using, as raw materials: at least one kind of a first fluorine-substituted alkyl group-containing organosilicon compound and a second fluorine-substituted alkyl group-containing organosilicon compound. The disclosure also relates to methods of producing a spectacle lens that is capable of retaining a sufficient water-and-oil repellency over an extended period, and having sufficient edge processability.

Claims

1. A spectacle lens comprising:

a lens base member;

a multi-layered anti-reflection film placed on the lens base member, and including a layer mainly made of silicon dioxide as an outermost layer; and

a water-and-oil repellent layer provided in contact with the outermost layer of the multi-layered anti-reflection film, and made by using, as raw materials;

at least one kind of a first fluorine-substituted alkyl group-containing organosilicon compound; and

a second fluorine-substituted alkyl group-containing organosilicon compound,

the first fluorine-substituted alkyl group-containing organosilicon compound being selected from the group consisting of a fluorine-substituted alkyl group-containing organosilicon compound expressed by the following general formula (1);

2. The spectacle lens according to claim 1, wherein

the water-and-oil repellent layer includes:

a first layer provided in contact with the outermost layer of the multi-layered anti-reflection film, and made by using the first fluorine-substituted alkyl group-containing organosilicon compound as a main raw material; and

a second layer provided in contact with the first layer, and made by using the second fluorine-substituted alkyl group-containing organosilicon compound as a main raw material.

3. The spectacle lens according to claim 1, further comprising:

either a hard coat layer, or a primer layer and a hard coat layer, between the lens base member and the multi-layered anti-reflection film.

4. The spectacle lens according to claim 1, wherein the first and the second fluorine-substituted alkyl group-containing organosilicon compounds each have an average molecular weight of 1000 to 10000.

5. The spectacle lens according to claim 1, wherein the water-and-oil repellent layer has a thickness of 5 to 30 nm.

6. A method for producing a spectacle lens comprising the steps of:

obtaining an anti-reflection film-attached lens by forming a multi-layered anti-reflection film on a lens base member, the multi-layered anti-reflection film including a layer mainly made of silicon dioxide as an outermost layer; and

forming a water-and-oil repellent layer on the anti-reflection film-attached lens, the water-and-oil repellent layer being made by using, as raw materials;

at least one kind of a first fluorine-substituted alkyl group-containing organosilicon compound; and

a second fluorine-substituted alkyl group-containing organosilicon compound,

the first fluorine-substituted alkyl group-containing organosilicon compound being selected from the group consisting of a fluorine-substituted alkyl group-containing organosilicon compound expressed by the following general formula (1);

7. The method for producing a spectacle lens according to claim 6, wherein,

the step of forming the water-and-oil repellent layer is a step of forming the water-and-oil repellent layer by preparing a solution containing the first fluorine-substituted alkyl group-containing organosilicon compound and the second fluorine-substituted alkyl group-containing organosilicon compound;

by coating a surface of the anti-reflection film-attached lens with the solution; and

by drying the surface.

8. The method for producing a spectacle lens according to claim 6, wherein

the step of forming the water-and-oil repellent layer is a step of forming the water-and-oil repellent layer on a surface of the anti-reflection film-attached lens by evaporating the first fluorine-substituted alkyl group-containing organosilicon compound and the second fluorine-substituted alkyl group-containing organosilicon compound in a vacuum chamber.

9. The method for producing a spectacle lens according to claim 6, wherein

the step of forming the water-and-oil repellent layer is a step of forming, on a surface of the anti-reflection film-attached lens, the water-and-oil repellent layer including a first layer made by using the first fluorine-substituted alkyl group-containing organosilicon compound as a main raw material, and a second layer made by using the second fluorine-substituted alkyl group-containing organosilicon compound as a main raw material, by evaporating the first fluorine-substituted alkyl group-containing organosilicon compound in a vacuum chamber to thereby form the first layer on the surface of the anti-reflection film-attached lens;

and then by evaporating the second fluorine-substituted alkyl group-containing organosilicon compound in the vacuum chamber to thereby form the second layer on a surface of the first layer.

10. The method for producing a spectacle lens according to claim 6, wherein

a surface of the lens base member is provided with:

a hard coat layer;

or

a primer layer and a hard coat layer.

11. A method for producing a spectacle lens that comprises:

a lens base member;

a multi-layered anti-reflection film placed on the lens base member, and including a layer mainly made of silicon dioxide as an outermost layer; and

a water-and-oil repellent layer provided in contact with the outermost layer of the multi-layered anti-reflection film, and made by using at least two kinds of fluorine-substituted alkyl group-containing organosilicon compounds as raw materials, the method comprising the steps of;

obtaining an anti-reflection film-attached lens by forming the multi-layered anti-reflection film on the lens base member; and

forming, on a surface of the anti-reflection film-attached lens, the water-and-oil repellent layer including a first layer made by using a first fluorine-substituted alkyl group-containing organosilicon compound as a main raw material, and a second layer made by using a second fluorine-substituted alkyl group-containing organosilicon compound as a main raw material, by evaporating the first and the second fluorine-substituted alkyl group-containing organosilicon compounds in a vacuum chamber sequentially with a certain time lag to thereby form the first layer on a surface of the anti-reflection film-attached lens, and to form the second layer on a surface of the first layer.

12. The method for producing a spectacle lens according to claim 11, wherein,

in forming the water-and-oil repellent layer,

at least one container is placed on a heat generating medium in the vacuum chamber, the container including material-filling spaces which are formed at two or more positions different in distance from the heat generating medium when the container is placed on the heat generating medium, and

the first and the second fluorine-substituted alkyl group-containing organosilicon compounds are stored respectively in the material-filling spaces so as to cause a time lag in the evaporation of the first and the second fluorine-substituted alkyl group-containing organosilicon compounds.

13. The method for producing a spectacle lens according to claim 11, wherein the first fluorine-substituted alkyl group-containing organosilicon compound is at least one kind selected from the group consisting of a fluorine-substituted alkyl group-containing organosilicon compound expressed by the following general formula (1):

14. The method for producing a spectacle lens according to claim 11, wherein the second fluorine-substituted alkyl group-containing organosilicon compound is expressed by the following general formula (6):