Eye lens with a specifically shaped transition region of an optical part

Patent metadata

Field	Value
Publication number	US-10098726-B2
Application number	US-201615045129-A
Country	US
Kind code	B2
Filing date	Feb 16, 2016
Priority date	Aug 13, 2013
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

An eye lens includes an optical part, which defines a first optical surface. The first optical surface is configured as turn with a pitch extending circumferentially about a principal axis (A) of the eye lens. A transition region is formed between a beginning and an end of the turn, which with a beginning edge and an end edge merges into the turn. The beginning edge extends between the principal axis (A) and a first circumferential location and the end edge extends between the principal axis (A) and a second circumferential location. The beginning edge projected into a plane (H) perpendicular to the principal axis (A) has a non-linear course and/or the end edge projected into a plane (H) perpendicular to the principal axis (A) has a non-linear course.

First claim

What is claimed is:

1. An eye lens comprising:
a lens body defining a principal axis (A) and having a first optical surface;
said first optical surface being at least partly configured to have a structure having a turn with a pitch extending about said principal axis (A) from a beginning to an end;
a transition region formed between said beginning and said end of said turn;
said transition region passing into said turn with a beginning edge and an end edge;
said beginning edge extending between said principal axis (A) and a first peripheral location and said end edge extending between said principal axis (A) and a second peripheral location;
said beginning edge being projected into a plane (H) perpendicular to said principal axis (A);
said end edge being projected into said plane (H) perpendicular to said principal axis (A); and,
wherein at least one of the following applies: said beginning edge exhibits a non-linear course; and, said end edge exhibits a non-linear course.

2. The eye lens of claim 1 , wherein at least one of the following applies:
said beginning edge is curved over the entire length thereof; and,
said end edge is curved over the entire length thereof.

3. The eye lens of claim 1 , wherein at least one of the following applies:
said beginning edge has a non-linear course, which, in comparison to a linear connection between said principal axis (A) and said first peripheral location viewed in a peripheral direction about said principal axis (A), is configured to extend in a direction toward said end edge; and,
said end edge has a non-linear course, which, in comparison to a linear connection between said principal axis (A) and said second peripheral location viewed in the peripheral direction about said principal axis (A), is configured to extend in a direction toward said beginning edge.

4. The eye lens of claim 1 , wherein said transition region defines a surface which is formed so that at least at said beginning edge between said principal axis (A) and said first peripheral location, a course is configured for which a slope of said surface of said transition region, when viewed in the peripheral direction, has the same slope course at all radial locations of said beginning edge.

5. The eye lens of claim 4 , wherein said transition region defines a surface which is formed so that at least at said beginning edge, over the entire length thereof, between said principal axis (A) and said first peripheral location, a course is configured for which a slope of said surface of said transition region, when viewed in the peripheral direction, has the same slope course at all radial locations of said beginning edge.

6. The eye lens of claim 4 , wherein said transition region defines a surface which is formed so that at least at said end edge between said principal axis (A) and said second peripheral location, a course is configured for which a slope of said surface of said transition region, when viewed in the peripheral direction, has the same slope course at all radial locations of said end edge.

7. The eye lens of claim 6 , wherein said transition region defines a surface which is formed so that at least at said end edge, over the entire length thereof, between said principal axis (A) and said second peripheral location, a course is configured for which a slope of said surface of said transition region, when viewed in the peripheral direction, has the same slope course at all radial locations of said end edge.

8. The eye lens of claim 1 , wherein said transition region defines a surface, when viewed in a section at a radial distance to said principal axis (A) and through said transition region, is configured to have a contour course which is at least partly configured to be nonlinear.

9. The eye lens of claim 8 , wherein said contour course is at least partly configured to be a parabola.

10. The eye lens of claim 8 , wherein said contour course is at least partly defined by a cubic function or is at least partly defined by a circular path section.

11. The eye lens of claim 8 , wherein said contour course, between said beginning edge and said end edge, is symmetrical to a symmetry plane disposed, in a peripheral direction about said principal axis (A), at the same angle distance from each of said beginning edge and said end edge.

12. The eye lens of claim 11 , wherein at least one of the following applies:
the slope course between said beginning edge and the symmetry plane is the same at all radial locations; and,
the slope course between said end edge and the symmetry plane is the same at all radial locations.

13. The eye lens of claim 4 , wherein at least one of the following applies:
the slope course between said beginning edge and the symmetry plane is the same at all radial locations, wherein the symmetry plane is disposed, in a peripheral direction about said principal axis (A), at the same angle distance from each of said beginning edge and said end edge; and,
the slope course between said end edge and the symmetry plane is the same at all radial locations.

14. The eye lens of claim 6 , wherein at least one of the following applies:
the slope course between said beginning edge and a symmetry plane is the same at all radial locations, wherein the symmetry plane is disposed, in a peripheral direction about said principal axis (A), at the same angle distance from each of said beginning edge and said end edge; and,
the slope course between said end edge and the symmetry plane is the same at all radial locations.

15. The eye lens of claim 1 , wherein a surface portion of said transition region is projected into the plane (H) disposed perpendicular to said principal axis (A) and is delimited by the projected beginning edge and the projected end edge; and, said surface portion of said transition region is smaller than a surface in said plane (H) delimited by two linear surface edges of which one extends from the principal axis (A) through said first peripheral location and the other extends from said principal axis (A) through said second peripheral location.

16. The eye lens of claim 1 , wherein said first optical surface has an asphericity which varies about said principal axis (A).

17. The eye lens of claim 1 , wherein said first optical surface has an asphericity which varies about said principal axis (A) and increases continuously.

18. The eye lens of claim 1 , wherein said first optical surface of said lens body is so configured that the refractive power of said lens body in a peripheral direction about said principal axis (A) for a rotation in a range between 1 diopter and 5 diopters changes.

19. The eye lens of claim 18 , wherein said refractive power changes continuously.

20. The eye lens of claim 18 , wherein said range is between 1 diopter and 4 diopters.

21. The eye lens of claim 1 , wherein the refractive power of said lens body outside of said transition region changes linearly as a function of the angle in the peripheral direction about said principal axis (A).

22. The eye lens of claim 1 , wherein said transition region has an angle width of less than 7° in the peripheral direction about said principal axis (A).

23. The eye lens of claim 22 , wherein said transition region is measured between said first and second peripheral locations.

24. The eye lens of claim 22 , wherein said angle width lies between 3° and 6.5°.

25. The eye lens of claim 1 , wherein said first optical surfa

Assignees

• Zeiss Carl Meditec Ag

Inventors

• Gerlach Mario
• Boehme Beate
• Dobschal Hans-Juergen

Classifications

• G02C7/028

  Special mathematical design techniques · CPC title

• A61F2/164

  Aspheric lenses · CPC title

• A61F2230/0069

  cylindrical · CPC title

• A61F2/1618 Primary

  Multifocal lenses · CPC title

• A61F2230/0063

  Three-dimensional shapes · CPC title