Eyeglass lens

Patent metadata

Field	Value
Publication number	US-2022397776-A1
Application number	US-202017778779-A
Country	US
Kind code	A1
Filing date	Dec 14, 2020
Priority date	Dec 27, 2019
Publication date	Dec 15, 2022
Grant date	—

Abstract

Provided are an eyeglass lens that includes a lens substrate having a plurality of substrate protruding portions that protrude from a substrate base portion on a surface of the lens substrate and a coating film provided so as to cover the plurality of substrate protruding portions, the outermost surface of the eyeglass lens having a plurality of convex portions and concave portions, in which the thickness of the coating film varies over the surrounding regions of the substrate protruding portions, and technology related thereto.

First claim

1 . An eyeglass lens comprising:
a lens substrate having a plurality of substrate protruding portions that protrude from a substrate base portion on a surface of the lens substrate; and a coating film provided so as to cover the plurality of substrate protruding portions, the outermost surface of the eyeglass lens having a plurality of convex portions and concave portions, wherein the thickness of the coating film varies over surrounding regions of the substrate protruding portions.

2 . The eyeglass lens according to claim 1 ,
wherein, when each substrate protruding portion is viewed in a plan view, the coating film is thin in a region extending in a predetermined direction in the surrounding region of the substrate protruding portion and a region extending in the opposite direction to the predetermined direction, and a portion with a thick coating film is present in a region extending in other directions.

3 . The eyeglass lens according to claim 1 ,
wherein, in more than 50% of all of the coating film convex portions, when, on a plot with a rotation angle of 0 to 360 degrees on a horizontal axis and the thickness of the coating film on a vertical axis with respect to a base of the coating film convex portion, the angle at which the thickness of the coating film is at the smallest value is set as a rotation angle of 0 degrees, the film thickness that is larger than the smallest value and is at the minimal value is the film thickness at the base where the rotation angle is in a range of 165 to 195 degrees.

4 . The eyeglass lens according to claim 1 ,
wherein, in more than 50% of all of the coating film convex portions, when, on a plot with a rotation angle of 0 to 360 degrees on a horizontal axis and the thickness of the coating film on a vertical axis with respect to a base of the coating film convex portion, the angle at which the thickness of the coating film is at the smallest value is set as a rotation angle of 0 degrees, the film thickness that is at the largest value and the maximal value is the film thickness at the base where the rotation angle is in a range of 50 to 110 degrees or the film thickness at the base where the rotation angle is in a range of 250 to 310 degrees, and the film thickness that is smaller than the largest value and is at the maximal value is present in a range of rotation angles where the largest value is not present.

5 . The eyeglass lens according to claim 1 ,
wherein a value obtained by dividing the smallest value of the thickness of the coating film extending over surrounding regions of more than 50% of all of the substrate protruding portions (at a rotation angle of 0 to 360 degrees) by the largest value of the thickness of the coating film (the smallest value/the largest value) is in a range of 0.10 to 0.99.

6 . The eyeglass lens according to claim 1 ,
wherein, on a cross-section of the lens that includes centers of more than 50% of all of the coating film convex portions, (the smallest value of difference values expressed by (the largest value of the thickness of the coating film−the thickness of the coating film at a vertex of the coating film convex portion))/(the largest value of difference values expressed by (the largest value of the thickness of the coating film−the thickness of the coating film at the vertex of the coating film convex portion)) is 0.90 or less.

7 . The eyeglass lens according to claim 1 ,
wherein the smallest value of the thickness of the film provided at bases of more than 50% of all of the substrate protruding portions is 0.01 to 2.00 times the film thickness of a coating film base portion.

8 . The eyeglass lens according to claim 1 ,
wherein defocus power of more than 50% of all of the coating film convex portions is in a range of 2.50 D to 6.50 D.

9 . The eyeglass lens according to claim 1 ,
wherein refractive power of more than 50% of all of the substrate protruding portions is in a range of 2.50 D to 6.50 D.

10 . The eyeglass lens according to claim 1 ,
wherein the thickness of the coating film of more than 50% of all of the coating film convex portions is in a range of 0.5 to 6.0 μm.

11 . The eyeglass lens according to claim 1 ,
wherein the eyeglass lens is able to suppress progression of near-sightedness.

12 . The eyeglass lens according to claim 2 ,
wherein, in more than 50% of all of the coating film convex portions, when, on a plot with a rotation angle of 0 to 360 degrees on a horizontal axis and the thickness of the coating film on a vertical axis with respect to a base of the coating film convex portion, the angle at which the thickness of the coating film is at the smallest value is set as a rotation angle of 0 degrees, the film thickness that is larger than the smallest value and is at the minimal value is the film thickness at the base where the rotation angle is in a range of 165 to 195 degrees.

13 . The eyeglass lens according to claim 12 ,
wherein, in more than 50% of all of the coating film convex portions, when, on a plot with a rotation angle of 0 to 360 degrees on a horizontal axis and the thickness of the coating film on a vertical axis with respect to a base of the coating film convex portion, the angle at which the thickness of the coating film is at the smallest value is set as a rotation angle of 0 degrees, the film thickness that is at the largest value and the maximal value is the film thickness at the base where the rotation angle is in a range of 50 to 110 degrees or the film thickness at the base where the rotation angle is in a range of 250 to 310 degrees, and the film thickness that is smaller than the largest value and is at the maximal value is present in a range of rotation angles where the largest value is not present.

14 . The eyeglass lens according to claim 13 ,
wherein a value obtained by dividing the smallest value of the thickness of the coating film extending over surrounding regions of more than 50% of all of the substrate protruding portions (at a rotation angle of 0 to 360 degrees) by the largest value of the thickness of the coating film (the smallest value/the largest value) is in a range of 0.10 to 0.99.

15 . The eyeglass lens according to claim 14 ,
wherein, on a cross-section of the lens that includes centers of more than 50% of all of the coating film convex portions, (the smallest value of difference values expressed by (the largest value of the thickness of the coating film−the thickness of the coating film at a vertex of the coating film convex portion))/(the largest value of difference values expressed by (the largest value of the thickness of the coating film−the thickness of the coating film at the vertex of the coating film convex portion)) is 0.90 or less.

16 . The eyeglass lens according to claim 15 ,
wherein the smallest value of the thickness of the film provided at bases of more than 50% of all of the substrate protruding portions is 0.01 to 2.00 times the film thickness of a coating film base portion.

17 . The eyeglass lens according to claim 16 ,
wherein defocus power of more than 50% of all of the coating film convex portions is in a range of 2.50 D to 6.50 D.

18 . The eyeglass lens according to claim 17 ,
wherein refractive power of more than 50% of all of the substrate protruding portions is in a range of 2.50 D to 6.50 D.

19 . The eyeglass lens according to claim 18 ,
wherein the thickness of the coating film of more than 50% of all of the coating film convex portions is in a range of 0.5 to 6.0 μm.

20 . The e

Assignees

• Ishizaki Takako
• Kono Shigetoshi
• Hoya Lens Thailand Ltd

Inventors

• Ishizaki Takako
• Kono Shigetoshi

Classifications

• G02C7/06 Primary

  bifocal; multifocal {; progressive (G02C7/041 takes precedence)} · CPC title

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• G02C7/022 Primary

  Ophthalmic lenses having special refractive features achieved by special materials or material structures (G02C7/049 takes precedence) · CPC title

• G02C7/02 Primary

  Lenses; Lens systems {; Methods of designing lenses} · CPC title

• G02C2202/24

  Myopia progression prevention · CPC title