Method for determining an optical equipment

• US 10,451,893 B2
• Filed: 06/06/2014
• Issued: 10/22/2019
• Est. Priority Date: 06/07/2013
• Status: Active Grant

• Current Assignee: Essilor International SA (EssilorLuxottica SA)
• Original Assignee: Essilor International SA (EssilorLuxottica SA)
• Inventors: Rego, Carlos, Roussel, Olivier, Granger, Berangere, Quere, Loic, Begon, Cedric
• Primary Examiner(s): Connolly, Mark A
• Application Number:
  US14/896,093
• Publication Number:
  US 20160124246A1
• Time in Patent Office: 1,964 Days
• CPC Class Codes: B29D 11/00009 Production of simple or compound lenses
• CPC Class Codes: B29D 11/00432 Auxiliary operations, e.g. machines for filling the moulds B29D11/00125 takes precedence
• CPC Class Codes: B29D 11/00951 Measuring, controlling or regulating
• CPC Class Codes: B29D 12/02 Spectacle frames constructional form G02C
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: G02C 13/003 Measuring during assembly or fitting of spectacles
• CPC Class Codes: G02C 5/008 Spectacles frames characterized by their material, material structure and material properties
• CPC Class Codes: G02C 7/027 considering wearer's parameters
• CPC Class Codes: G02C 7/028 Special mathematical design techniques

Abstract

Method implemented by computer for determining an optical equipment including at least an optical lens and a spectacle frame, the lens being adapted to be mounted in the frame, the method including:

• • a wearer data providing step, during which wearer data relating to the wearer'"'"'s optical requirements is provided,
  • an optical cost function providing step, during which an optical cost function is provided, the optical cost function relating to the optical function of the lens,
  • a comfort cost function providing step, during which a comfort cost function is provided, the comfort cost function relating to the weight of the optical equipment,
  • an optical equipment determining step, during which the optical equipment that minimizes the difference between a global cost function and a target value of the global cost function is determined, the global cost function being a weighted sum of the optical and comfort cost functions.

Claims

1. Method implemented for determining an optical equipment, wherein:

said optical equipment comprises at least an optical lens and a spectacle frame, the optical lens being mounted in the spectacle frame,

the method comprising;

a wearer data providing step, during which wearer data relating at least to the wearer'"'"'s optical requirements are provided,

an optical cost function providing step, during which an optical cost function is provided, the optical cost function being related to the optical function of the at least one optical lens and being defined based at least on part of the wearer data,

a comfort cost function providing step, during which a comfort cost function is provided, the comfort cost function being related at least to the weight of the optical equipment,

an optical equipment determining step, during which the optical equipment that minimizes the difference between a global cost function and a target value of the global cost function is determined, the global cost function being a weighted sum of the optical and the comfort cost functions,

an initial optical equipment providing step, comprising providing an initial optical equipment comprising at least one initial optical lens and an initial spectacle frame, wherein the initial optical lens is adapted to the wearer'"'"'s optical requirements and the initial spectacle frame,

a working optical equipment defining step, during which a working optical equipment is defined to be equal to the initial optical equipment,

a global cost function evaluation step during which the global cost function is evaluated, and

a modifying step, during which the working optical equipment is modified,

wherein the evaluation and modifying steps are repeated so as to minimize the difference between the global cost function and a target value of the global cost function.

2. The method according to claim 1, wherein the comfort cost function relates to the mechanical forces applied by the optical equipment to the wearer when the optical equipment is worn by the wearer.

3. The method according to claim 2, wherein the comfort cost function is provided so as to be minimum when a friction forces and/or a clamping force between the spectacle frame and at least a contact zone of the spectacle frame with the wearer when the optical equipment is worn by the wearer reaches a given value.

4. The method according to claim 1, wherein the comfort cost function is provided so as to be minimum when the difference of weight of the optical equipment between the right and left sides corresponds to a weight difference predetermined value.

5. The method according to claim 1, wherein the comfort cost function is provided so as to be minimum when the weight distribution supported by head and/or face contact zones with the optical equipment when the optical equipment is worn by the wearer corresponds to a first weight distribution predetermined value.

6. The method according to claim 5, wherein the comfort cost function is provided so as to be minimum when the difference of weight of the optical equipment supported by the nose of the wearer and the pinna of the wearer corresponds to a second weight distribution predetermined value.

7. The method according to claim 6, wherein the second weight distribution predetermined value is determined according to a postural preferential use of the optical equipment.

8. The method according to claim 5, wherein the first weight distribution predetermined value is determined according to a postural preferential use of the optical equipment.

9. The method according to claim 1, wherein the comfort cost function is provided so as to be minimum when the weight of the optical equipment is minimum.

10. The method according to claim 1, wherein the wearer data comprise functional preference data related to optical lens functions sensitive to optical lens geometry and/or positioning with respect to the wearer'"'"'s face.

11. The method according to claim 10, wherein functional preference data refer to desired filtering properties such as transmission and/or absorption and/or reflexion properties of the optical lens.

12. The method according to claim 1, wherein the wearer data comprises morphological wearer data related to the morphology of the head and/or face contact zones with the optical equipment when the optical equipment is worn by the wearer, and the comfort cost function is related to the mechanical forces applied by the optical equipment to said contact zones.

13. The method according to claim 12, wherein the morphology data relates to the shape and position of the nose and/or of the pinna and/or of the temporal zones of the wearer.

14. The method according to claim 1, wherein the modifying step further comprises modifying at least one of:

a material of the optical lens,

a coating of the optical lens,

at least one optical surface of the optical lens,

a relative position of the optical surfaces of the optical lens,

a material of the spectacle frame,

a weight distribution of the spectacle frame,

a weight distribution of the optical lens,

a shape of the spectacle frame, and

a shape of the optical lens.

15. The method according to claim 1, wherein the method further comprises:

a manufacturing device data providing step during which the manufacturing device data identifying the manufacturing devices available to manufacture the optical equipment is provided, and

a modifying step, wherein the optical equipment is modified considering the technical possibility of the manufacturing devices identified by the manufacturing data.

16. The method according to claim 1, wherein

the wearer data comprises morphology data related to the morphology of the wearer,

the method further comprises an esthetic cost function providing step, during which an esthetic cost function is provided, the esthetic cost function being related to the horizontality of the optical equipment when worn by the wearer, and

the global cost function is a weighted sum of the optical, the comfort and the esthetic cost functions.

17. The method according to claim 16, wherein the esthetic cost function further relates to a symmetrical distribution with respect to the central vertical axis of the wearer'"'"'s face of the optical equipment about the wearer face when worn by the wearer.

18. The method according to claim 1, wherein the method further comprises a mechanical robustness cost function providing step, during which a mechanical robustness cost function is provided and

the global cost function is a weighted sum of the optical, the comfort and the mechanical robustness cost functions.

19. The method according to claim 1, further comprising manufacturing at least part of the optical equipment determined during the optical equipment determining step using an additive manufacturing method.

20. The method according to claim 19, wherein the additive manufacturing method comprises after the optical equipment determining step, a construction strategy determining step which comprises at least one of the following steps:

the determination of the geometries and locations of voxels

the determination of the geometries and locations of slices made of a plurality of voxels,

the determination of the orientation of the global arrangement of voxels and/or slices in the referential of the additive manufacturing equipment(s),

the determination of the order according to which the voxels and/or slices are to be manufactured.

21. The method according to claim 1, further comprising:

manufacturing at least part of the spectacle frame using an additive manufacturing method,

choosing and repartitioning different materials of the spectacle frame so as to minimize a difference between the global cost function and a target value of the global cost function, and

making the spectacle frame of the optical equipment from the chosen and repartitioned different materials.

22. The method according to claim 1, further comprising:

manufacturing at least part of the spectacle frame using an additive manufacturing method, and

determining at least one internal cavity so as to minimize the difference between the global cost function and a target value of the global cost function,

wherein the spectacle frame of the optical equipment determined during the optical equipment determining step comprises the at least one internal cavity determined so as to minimize the difference between the global cost function and a target value of the global cost function.

23. The method according to claim 1, further comprising:

manufacturing a functionally graded material using an additive manufacturing method,

wherein at least part of the optical equipment comprises a functionally graded material.

24. Method of providing an optical equipment to a wearer comprising the steps of:

determining an optical equipment according to claim 1 and

manufacturing the determined optical equipment.

25. The method according to claim 24, wherein at least part of the determined optical equipment is manufactured using an additive manufacturing method.

26. The method according to claim 25, wherein the additive manufacturing method is selected in the list consisting of stereolithography, mask stereolithography or mask projection stereolithography, polymer jetting, scanning laser sintering or SLS, scanning laser melting or SLM, fused deposition modeling or FDM.