Refractive optical component and spectacle lens produced therefrom, method for producing a refractive optical component, computer program product, construction data of a spectacle lens stored on a data medium, device for additive

Patent metadata

Field	Value
Publication number	US-11279104-B2
Application number	US-202117398435-A
Country	US
Kind code	B2
Filing date	Aug 10, 2021
Priority date	Feb 14, 2019
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A refractive optical component has a main body with a plurality m of optical layers extending between a front side and a back side, each layer having a thickness, wherein each of the layers extends over a region common to all layers, the common region being greater than the maximum thickness of the respective layer by at least a factor of 10, wherein the thickness of the layers varies over the extent thereof transversely to the principal axis, and wherein the main body has a refractive index curve (n=n(x, y, z)), modulated at least in the direction parallel to the principal axis, with a plurality of maxima and minima, a distance between adjacent maxima and minima ranging between 0.5 μm and 100 μm and a refractive index difference Δn between adjacent maxima and minima ranging between 10−4 and 0.3.

First claim

The invention claimed is:

1. A refractive optical component comprising:
a main body manufactured in a 3D printing method, the main body having a front side, a back side, and a principal axis perpendicular to at least one of the front side or the back side,
wherein the main body has a plurality of optical layers extending between the front side and the back side and each optical layers from the plurality of optical layers having a thickness in a direction parallel to the principal axis in a range of 1 μm to 100 μm,
wherein the optical layers are applied one on top of another,
wherein the number of optical layers is constant over an extent of the refractive optical component transversely to the principal axis,
wherein each of the optical layers extends over a common region being common to all the optical layers in directions perpendicular to the principal axis, the common region being greater than a maximum thickness of the respective layer by at least a factor of 10,
wherein the thicknesses of the optical layers vary over the extent thereof transversely to the principal axis,
wherein the main body has a refractive index profile that is modulated at least in a direction parallel to the principal axis, with:
a plurality of maxima and minima,
a distance between adjacent maxima and minima ranging between 0.5 μm and 100 μm, and
a refractive index difference between adjacent maxima and minima ranging between 10 −4 and 0.3, and

wherein a number of maxima in the refractive index profile within a given optical layer in directions transversely to the principal axis is less than 20.

2. The refractive optical component as claimed in claim 1 , wherein the refractive optical component is a spectacle lens.

3. The refractive optical component as claimed in claim 1 , wherein the number of optical layers is at least 50.

4. The refractive optical component as claimed in claim 1 , wherein the optical layers each have surface normals which are inclined by at most 67° relative to the direction of the principal axis.

5. The refractive optical component as claimed in claim 1 , wherein the refractive index profile is homogeneous along the front side.

6. The refractive optical component as claimed in claim 1 , wherein the refractive index profile is homogeneous along the front side and the back side.

7. The refractive optical component as claimed in claim 1 , wherein interfaces running between two layers adjoining one another are aligned in each case such that the interfaces end neither on the front side nor on the back side of the main body.

8. The refractive optical component as claimed in claim 1 , wherein the main body has a maximum thickness of at most 8 mm in the direction parallel to the principal axis and an extent of at least 1 cm in the directions perpendicular to the principal axis.

9. The refractive optical component as claimed in claim 1 , wherein the refractive index profile is quasi-periodic along the principal axis.

10. The refractive optical component as claimed in claim 1 , wherein the refractive index profile is periodic along the first direction.

11. The refractive optical component as claimed in claim 1 , wherein interfaces running transversely between two layers adjoining one another in a principal direction in each case are located at a first distance from the front side and a second distance from the back side of the main body, and
wherein a ratio of the first distance to the second distance varies by at most 30% over the extent of the main body in the directions transversely to the principal direction.

12. The refractive optical component as claimed in claim 1 , wherein proceeding from an arbitrary point on the front side of the main body adjacent interfaces in a sequence of interfaces in the principal direction are arranged at distances which vary by at most 30%.

13. A spectacle lens manufactured from a refractive optical component as claimed in claim 1 .

14. A method for manufacturing a refractive optical component as claimed in claim 1 , the method comprising:
providing a device for additive manufacturing of the main body from a transparent material,
providing construction data of the main body to be manufactured having the front side, the back side, and the principal axis perpendicular to at least one of the front side or the back side, and
having the plurality of optical layers extending between the front side and the back side and each optical layer having the thickness in the direction parallel to the principal axis,
wherein each of the optical layers extends over the common region being common to all the optical layers in the directions perpendicular to the principal axis, the common region being greater than the maximum thickness of the respective optical layer by at least a factor of 10,
wherein the thicknesses of the optical layers vary over the extent thereof transversely to the principal axis, and
wherein the thicknesses of the optical layers are in the range of 1 μm to 100 μm;
providing a carrier; and
progressively applying the transparent material to the carrier in accordance with the construction data provided,
wherein the optical layers are applied one on top of another, and
wherein the number of the optical layers is constant over the extent of the optical component transversely to the principal axis.

15. The method as claimed in claim 14 , wherein the number of optical layers is at least 50.

Assignees

• Zeiss Carl Ag
• Zeiss Carl Vision Int Gmbh

Inventors

• Totzeck Michael
• Haidl Markus

Classifications

• B33Y50/00

  Data acquisition or data processing for additive manufacturing · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B29L2011/0016

  Lenses · CPC title

• B29C64/386

  Data acquisition or data processing for additive manufacturing · CPC title

• B29C64/112

  using individual droplets, e.g. from jetting heads · CPC title