Computer-implemented method for generating data in order to produce at least one spectacle lens, and method for producing a pair of spectacles

Patent metadata

Field	Value
Publication number	US-11747654-B2
Application number	US-202318156220-A
Country	US
Kind code	B2
Filing date	Jan 18, 2023
Priority date	Jul 23, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A computer-implemented method for generating data to produce a spectacle lens adapted to a spectacle frame is disclosed. The method includes: (i) providing, on a storage medium, a first data set containing a centering value and a three-dimensional model of the spectacle frame; (ii) creating, using the first data set, a second data set containing a geometric value of a surface of the spectacle lens; (iii) creating, in order to produce the spectacle lens from a spectacle lens blank and to grind in and/or fit the at least one spectacle lens into the spectacle frame using the first and second data sets, a third data set stored on the storage medium, wherein the data values of each data set have a spatial relationship with respect to each other such that the data values of each data set are consistently specified in relation to a particular coordinate system.

First claim

The invention claimed is:

1. A computer-implemented method for generating data for the production of at least one spectacle lens adapted to a spectacle frame of a pair of spectacles, the computer-implemented method comprising the following steps:
(i) providing at least one first data set stored on a storage medium, the first data set including at least the following data values:
at least one centering value; and
a three-dimensional model of the spectacle frame;

(ii) creating at least one second data set stored on the storage medium using the at least one first data set, the second data set comprising at least the following data values:
at least one geometric value of at least one surface of the at least one spectacle lens,

wherein the method further comprises the following step:
(iii) creating at least one third data set stored on a storage medium for producing the at least one spectacle lens from at least one spectacle lens blank and for grinding and/or fitting the at least one spectacle lens into the spectacle frame using the at least one first data set and the at least one second data set, wherein the at least one third data set is a production data set, each data value of the at least one third data set including at least one piece of information relating to the production of the at least one spectacle lens or to grinding and/or fitting the at least one spectacle lens into the spectacle frame, wherein the information is used in a method for producing at least one pair of spectacles, and
wherein the data values of each data set have a spatial relationship with one another in that the data values of each data set are consistently specified in relation to a respective coordinate system, with all data values of each data set being specified in a coordinate system common to all data sets.

2. The computer-implemented method according to claim 1 , wherein the common coordinate system is selected from a coordinate system which relates to a position of the at least one pupil of the at least one eye of the user and the line of sight extending therefrom of the at least one eye of the user through the at least one spectacle lens.

3. The computer-implemented method according to claim 2 , wherein an own coordinate system, which relates to a position of the respective pupil of the relevant eye of the user and the line of sight extending therefrom of the relevant eye of the user through the associated spectacle lens, is chosen for each of the two eyes of the user.

4. The computer-implemented method according to claim 2 , wherein the own coordinate system for each of the two eyes has
a first axis parallel to a line of sight of the eye of the user;
a second axis perpendicular to the first axis parallel to a direction of gravity; and
a third axis perpendicular to both the first axis and the second axis.

5. The computer-implemented method according to claim 1 , wherein the at least one centering value is determined by creating a centering record with the spectacle frame worn by the user while the user adopts a habitual head and body posture and a fixed line of sight through at least one dummy lens fitted into the spectacle frame.

6. The computer-implemented method according to claim 1 , wherein the at least one centering value comprises at least one of the following data values:
at least one distance from a corneal vertex of at least one eye of the user to a visual point of at least one line of sight through at least one surface of the spectacle lens;
at least one distance from the visual point to a straight line through at least one lowest point of a frame edge curve of the spectacle frame or an edge curve of the at least one spectacle lens; and
at least one horizontal distance between an identical position on each of the two spectacle lenses.

7. The computer-implemented method according to claim 6 , wherein the three-dimensional model of the spectacle frame comprises a multiplicity of data points relating to the frame edge curve of the spectacle frame.

8. The computer-implemented method according to claim 7 , wherein the multiplicity of data points are recorded by measuring using the spectacle frame or are selected from provided spatial design data of the spectacle frame.

9. The computer-implemented method according to claim 1 , wherein the geometric data values relate to a spatial shape of the spectacle lens, wherein the three-dimensional shape of the spectacle lens comprises a spherical or aspherically rotationally symmetrical convex front surface and a back surface of the spectacle lens configured to correct at least one refractive error of at least one eye of the user.

10. The computer-implemented method according to claim 9 , wherein, starting from a determined starting surface, at least one optimization step for determining the back surface for the user is performed, and wherein the at least one centering value from the at least one first data set is used as a boundary condition for the at least one optimization step.

11. The computer-implemented method according to claim 10 , wherein the at least one second data set comprises at least one further data value that specifies a lens selection for the at least one spectacle lens.

12. A computer program for carrying out a computer-implemented method as claimed in claim 1 .

13. A method for producing a pair of spectacles, the method comprising the following steps:
(I) generating data for the production of at least one spectacle lens adapted to a spectacle frame of a pair of spectacles according to the computer-implemented method according to claim 1 ;
(II) producing the at least one spectacle lens from at least one spectacle lens blank and grinding and/or fitting the at least one spectacle lens into the spectacle frame using the third data set of the data generated according to step (I).

14. The method according to claim 13 , wherein the production of the at least one spectacle lens from the at least one spectacle lens blank comprises the following steps:
a) inserting a spectacle lens blank into a holding device for fixing the spectacle lens blank;
b) machining a lateral edge of the spectacle lens blank, wherein an edge shape of the spectacle lens is determined;
c) machining at least one surface of the spectacle lens blank, wherein a corrective effect of the spectacle lens is obtained;
wherein steps a) to c) are each performed using the at least one third data set.

15. The method according to claim 14 , wherein before step b) at least one marking is applied to the back surface of the spectacle lens using the at least one third data set, step b) is being carried out using the at least one marking on the back surface of the spectacle lens.

16. The method according to claim 15 , wherein before step b) at least one further marking is applied to the front surface of the spectacle lens using the at least one third data set.

17. A system for producing at least one spectacle lens adapted to a spectacle frame of a pair of spectacles, the system comprising:
at least one first device, which is set up for determining at least one centering value;
at least one second device, which is set up for determining a three-dimensional model of the spectacle frame;
at least one third device, which is set up for determining at least one geometric value of at least one surface of the at least one spectacle lens;
at least one first evaluation unit including:
at least one first input interface, which is set up for receiving the at least one centering value and the three-dimensional model of the spectacle frame;
at least one first calculati

Assignees

• Zeiss Carl Vision Int Gmbh

Inventors

• Meschenmoser Ralf
• Pauker Friedrich
• Kelch Gerhard

Classifications

• G02C13/005 Primary

  Measuring geometric parameters required to locate ophtalmic lenses in spectacles frames (apparatus for testing or instruments for examining the eyes per se A61B3/00; machines or devices and accessories for grinding the edges of lenses using spectacles as a template B24B9/144) · CPC title

• G02C7/024

  Methods of designing ophthalmic lenses · CPC title