Data record for use in a method for producing a spectacle lens

Patent metadata

Field	Value
Publication number	US-12204175-B2
Application number	US-202117412543-A
Country	US
Kind code	B2
Filing date	Aug 26, 2021
Priority date	Mar 1, 2019
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

A data record contains at least the following data values: spatial coordinates of a reference point at each eye of the wearer; a spatial direction vector for specifying a viewing direction of the wearer through the spectacle lens; and a spatial rim curve or edge curve. The data record can be used to produce a spectacle lens. A method and a computer program for generating the data record, and a method for producing the spectacle lens are also disclosed. It is possible to produce the spectacle lens after a single capture of a data record for adapting the spectacle lenses to the wearer of the pair of spectacles and to the spectacle frame selected by the wearer. A different spectacle lens as the spectacle lens originally selected can subsequently be used as the spectacle lens without having to record a further data record for the adaptation for the wearer.

First claim

The invention claimed is:

1. A non-transitory storage medium storing a data record for use in a method for producing a spectacle lens from a spectacle lens blank based on centration data, the data record comprising at least the following data values:
spatial coordinates of a reference point at each eye of a wearer;
at least one spatial direction vector for specifying at least one viewing direction of the wearer through the spectacle lens; and
a spatial rim curve or edge curve,

wherein the data record further contains additional information, and wherein the additional information relates to at least one correction of a data value,
wherein all centration values included by the centration data, which are used for producing the spectacle lens for a spectacle frame selected by a wearer of a pair of spectacles, have already been determined only from knowledge of the data values of the data record, or
wherein the data values of the data record are used directly to optimize a front surface and a back surface of the spectacle lens.

2. The non-transitory storage medium of claim 1 , wherein all data values are specified in relation to a same spatial coordinate system.

3. The non-transitory storage medium of claim 1 , wherein the reference point on the eye of the wearer is selected from: a pupil center, a pupillary reflex, a corneal apex, or a center of rotation of the eye.

4. The non-transitory storage medium of claim 1 , wherein the at least one viewing direction of the wearer through the spectacle lens is selected from: a main fixation direction, a principal viewing direction, an activity-specific viewing direction of the wearer, or a viewing direction of the wearer modified by a correction value.

5. The non-transitory storage medium of claim 1 , wherein the rim curve or edge curve is available as a multiplicity of data points, and wherein the multiplicity of data points is selected from: edge values of a spectacle frame or a lens edge frame captured by measurement, design data of the spectacle frame or of the lens edge frame.

6. The non-transitory storage medium of claim 1 , wherein the additional information is incorporated in the data record as at least one additional data value or wherein the additional information is included in at least one of the data values of the data record.

7. The non-transitory storage medium of claim 1 , wherein the correction of the data values comprises at least one of the following correction values:
a spatial change in a head posture of the wearer;
a change in a vertical coordinate of at least one visual point; or
a change in the spatial direction vector indicating the at least one viewing direction of the wearer through the spectacle lens relative to the viewing direction adopted by the wearer when recording the viewing direction.

8. The non-transitory storage medium of claim 7 , wherein the spatial change in the head posture of the wearer comprises a change in at least one of:
a habitual head posture;
a correction of a forward tilt of the head of the wearer;
a rotation of the head of the wearer; or
a lateral tilt of the head of the wearer at a time of an image recording.

9. The non-transitory storage medium of claim 7 , wherein the change in a vertical coordinate of the at least one visual point comprises a displacement of a stamp image parallel to the vertical direction of a frame plane of the spectacle frame.

10. A method for generating a data record used in a method for producing a spectacle lens from a spectacle lens blank based on centration data, wherein the data record comprises at least the following data values:
spatial coordinates of a reference point at each eye of the wearer;
at least one spatial direction vector for specifying at least one viewing direction of a wearer through the spectacle lens; and
a spatial rim curve or edge curve, the method comprising:
generating each of the data values from values captured by measurement or from available data,
wherein the data record contains additional information, and wherein the additional information relates to at least one correction of the data values,
wherein all centration values included by the centration data, which are used for producing the spectacle lens for a spectacle frame selected by a wearer of a pair of spectacles, have already been determined only from knowledge of the data values of the data record, or
wherein the data values of the data record are used directly to optimize a front surface and a back surface of the spectacle lens.

11. The method of claim 10 , wherein each of the data values is captured with an optical measuring device, and wherein at least one frontal recording of the wearer and at least one lateral recording of the wearer are made simultaneously in relation to the viewing direction of the wearer while the wearer wears the spectacle frame.

12. The method of claim 11 , wherein a virtual model of a section of the wearer is created from the at least one frontal recording of the wearer and the at least one lateral recording of the wearer, wherein the section of the wearer includes at least each eye of the wearer and a part of the wearer readied to wear the spectacle frame, and wherein the spectacle frame is worn by the virtual model.

13. A method for producing a spectacle lens, wherein the spectacle lens is produced by processing a spectacle lens blank, wherein the spectacle lens blank is processed based on centration data, and wherein the centration data are ascertained from a data record, the method comprising:
providing the data record containing at least the following data values:
spatial coordinates of a reference point on the eye of the wearer;
at least one spatial direction vector for specifying at least one viewing direction of the wearer through the spectacle lens; and
a spatial rim curve or edge curve,

wherein the data record contains additional information, and wherein the additional information relates to at least one correction of a data value,
wherein all centration values included by the centration data, which are used for producing the spectacle lens for a spectacle frame selected by a wearer of a pair of spectacles, have already been determined only from knowledge of the data values of the data record, or
wherein the data values of the data record are used directly to optimize a front surface and a back surface of the spectacle lens.

14. The method of claim 13 , wherein the centration data are selected from at least one of the following centration values:
a distance between the corneal apex of the respective eye and a visual point of a viewing direction;
distances between visual points and straight lines through innermost points of the rim curves or edge curves;
distances between visual points and straight lines through lowermost points of the rim curves or edge curves;
horizontal distances between inner and outer vertical boundaries of rectangles of a boxed system that circumscribe the rim curves or edge curves and are located in a lens plane;
vertical distances between upper and lower horizontal boundaries of the rectangles of the boxed system that circumscribe the rim curves or edge curves and are located in the lens plane;
horizontal distances between the visual points and vertical center lines of the boxed system;
vertical distances between the visual points and horizontal center lines of the boxed system;
distances between the corneal apex of the respective eye and the lens plane;
an angle between the lens planes and the frame plane; or
an angle by which the frame plane is tilted forward out of the perpendicular.

15. The met

Assignees

• Zeiss Carl Vision Int Gmbh

Inventors

• Gamperling Michael
• Wietschorke Helmut
• Haas Peter Johann

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