Method for Determining an Optical Equipment Comprising at Least One Optical Lens and a Spectacle Frame

• US 20160327812A1
• Filed: 12/30/2014
• Published: 11/10/2016
• Est. Priority Date: 01/03/2014
• Status: Active Grant

• Current Assignee: Essilor International SA
• Original Assignee: Essilor International SA
• Inventors: BEGON, Cdric, TESSIERES, Melanie
• Granted Patent: US 10,310,297 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 1/11 Anti-reflection coatings
• CPC Class Codes: G02C 13/003 Measuring during assembly or fitting of spectacles
• CPC Class Codes: G02C 13/005 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 Class Codes: G02C 2202/06 Special ophthalmologic or optometric aspects
• CPC Class Codes: G02C 7/024 Methods of designing ophthalmic lenses
• CPC Class Codes: G02C 7/027 considering wearer's parameters
• CPC Class Codes: G02C 7/10 Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses

Abstract

Method for determining optical equipment comprising at least one optical lens and a spectacle frame. Wearer data relating to the wearer'"'"'s optical requirements, wearer'"'"'s face morphology and optical equipment position on the wearer face are provided. An optical cost function is provided related to an optical function of the at least one optical lens when worn by said wearer. A light protection cost function is provided related to a spectral irradiance estimation over the wearer eye and/or wearer skin in a peri-orbital zone of the wearer eye under a given condition when said optical equipment is worn by said wearer. 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 function of the optical and the light protection cost functions.

Claims

1. Method implemented by computer means for determining an optical equipment comprising at least one optical lens and a spectacle frame, the optical lens being adapted to be mounted in the spectacle frame in front of a wearer eye, the method comprising:

a wearer data providing step, during which wearer data relating at least to the wearers optical requirements, to a wearer'"'"'s face morphology and to the optical equipment position in respect with the wearer face when said optical equipment is worn by said wearer are provided;

an optical cost function providing step, during which an optical cost function is provided, the optical cost function being related to an optical function of the at least one optical lens when said optical equipment is worn by said wearer;

a light protection cost function providing step, during which a light protection cost function is provided, the light protection cost function being related to at least a spectral irradiance estimation over the wearer eye and/or wearer skin in a peri-orbital zone of the wearer eye under at least a given condition when said optical equipment is worn by said wearer; and

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 by modifying at least one parameter of the optical equipment, the global cost function being a function of the optical and the light protection cost functions.

2. The method according to claim 1, wherein the given condition comprises an information regarding a location of at least one scene in which said wearer stands, said at least one scene comprising a spatial repartition of spectral albedo and at least one radiance source, said at least one radiance source having a determined emitting spectrum and a position in respect with the wearer face when said optical equipment is worn by said wearer, wherein said light protection cost function providing step involves a step of modeling the irradiance coming from said at least one scene highlighted by said at least one radiance source.

3. The method according to claim 2, said determined emitting spectrum is limited to at least a spectral window such as a UV-A window, UV-B window, visible window, near infrared window, mid infrared window, far infrared window.

4. The method according to claim 1, said optical cost function being determined by considering a first spectral window, said light protection cost function being determined by considering a second spectral window, wherein said first spectral window and said second spectral window are different.

5. The method according to claim 1, wherein said optical equipment determining step involves a step of determining a set of value (OCF₁, . . . ,OCF_n;

LPCF₁, . . . , LPCF_n) for said optical cost function and for said light protection cost function in considering a set of value of at least one parameter of the optical equipment for determining said optical equipment that minimizes the difference between a global cost function and a target value of the global cost function.

6. The method according to claim 5, wherein said at least one parameter of the optical equipment is a geometrical parameter of the at least one optical lens.

7. The method according to claim 5, wherein said at least one parameter of the optical equipment is chosen within the list consisting of:

a distance separating the rear face of said at least one optical lens and the wearer eye, when said optical equipment is worn by said wearer;

a wrap angle and/or a pantoscopic angle of said at least one optical lens;

a curvature map of the rear face of said at least one optical lens;

a curvature map of the front face of said at least one optical lens; and

a contour shape of said at least one optical lens;

8. The method according to claim 5, wherein the at least one parameter of the optical equipment is an anti-reflecting coating parameter.

9. The method according to claim 8, wherein the anti-reflecting coating parameter relates to a choice of an anti-reflecting coating in a list of anti-reflecting coatings.

10. The method according to claim 5, wherein said at least one parameter of the optical equipment is a geometrical parameter of the spectacle frame.

11. The method according to claim 5, wherein said at least one parameter of the optical equipment is chosen within the list consisting of:

a spatial map of radiance attenuation coefficient of said at least one optical lens; and

a radiance polarization coefficient of said at least one optical lens.

12. The method according to claim 1, wherein the target value of the global cost function is determined at least partially from an eye-safety recommendation comprised in a standard.

13. The method according to claim 1, wherein the target value of the global cost function is determined at least partially from wearer data provided by the wearer or measured on the wearer.

14. The method according to claim 1, wherein said light protection cost function providing step involves a step of determining a position of the least one optical lens in respect with the wearer eye when said optical equipment is worn by said wearer, wherein said step of modeling the position of the least one optical lens considers real wearing parameters determined on the wearer when the wearer is wearing a try frame identical to the spectacle frame.

15. The method according to claim 1, wherein wearer data further comprises data belonging to a type chosen within the list consisting in:

Wearer vision behavior;

Wearer personalized light sensitivity;

Wearer aesthetic optical lens preference;

Wearer occupational activity; and

Wearer age.