System and method for compensating deviations in an optical lens manufacturing process

Patent metadata

Field	Value
Publication number	US-10639765-B2
Application number	US-201515570715-A
Country	US
Kind code	B2
Filing date	May 29, 2015
Priority date	May 29, 2015
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A real-time calculation system capable of computing the industrial optical performance and yields of a prescription laboratory is disclosed. The system uses statistical analysis to determine the compensation factors that can be applied to given products, Semi-Finish, materials, or lens designs to increase the lab yields. Using a monitoring and configuration system, the user tracks the evolution of the laboratory's performance and identifies areas in which yields are impacted. The user defines how the calculation system will optimize the laboratory's performance, such as by defining how the compensation factors will be calculated and applied.

First claim

What is claimed is:

1. A system for compensating for deviations in an optical lens manufacturing process, comprising:
an analyzer configured to compute deviations in one or more surfaced optical lenses based upon nominal optical prescription values and parameters measured on one or more lenses output from lens surfacing equipment, the analyzer further configured to compute compensation factors for one or more future optical lens manufacturing runs based upon the deviations, wherein the computing the compensation factors includes adjusting optical prescriptions; and
a Lab Management System coupled to the lens surfacing equipment, the Lab Management System configured to receive the compensation factors from the analyzer and to apply the compensation factors during the one or more future optical lens manufacturing runs,
wherein the Lab Management System is further configured to adjust an optical prescription to compensate for computed deviations in the lens surfacing equipment before sending the optical prescription to a Lens Design System.

2. The system of claim 1 , wherein the analyzer is further configured to provide the compensation factors directly to the lens surfacing equipment.

3. The system of claim 1 , wherein the Lab Management System is further configured to adjust an optical design received from a Lens Design System calculator to compensate for computed deviations in the lens surfacing equipment.

4. The system of claim 1 , wherein the analyzer is further configured to compute compensation factors for deviations in one or more lens blanks.

5. A method for computing compensation factors for optical lens manufacturing, comprising:
automatically computing manufacturing deviations in one or more optical lenses using nominal optical prescription values and stored measurements of lenses that have completed a surfacing process;
computing compensation factors for one or more future optical lens manufacturing runs based upon the manufacturing deviations, wherein the computing the compensation factors includes adjusting optical prescriptions;
receiving the compensation factors at a Lab Management System coupled to lens surfacing equipment;
applying, by the Lab Management System, the compensation factors during the one or more future optical lens manufacturing runs; and
adjusting an optical prescription to compensate for computed deviations in the lens surfacing equipment before sending the optical prescription to a Lens Design System.

6. The method of claim 5 , wherein the compensation factors correspond to one or more of an amount of lens surfacing equipment wear, a brand of lens surfacing equipment, a brand of consumable used, and a type of consumable used.

7. The method of claim 5 , further comprising:
grouping the computed manufacturing deviations or the compensation factors or both by one or more categories comprising: Semi-Finish, product code, optical design, design vendor, Lens Design System, and material categories.

8. The method of claim 5 , further comprising:
computing statistical deviations based upon the computed manufacturing deviations; and
computing the compensation factors for the future optical lens manufacturing runs based upon the statistical deviations.

9. The method of claim 5 , further comprising:
obtaining the compensation factors from a the Lab Management System for adjustment of commands provided to lens manufacturing equipment to compensate for the computed manufacturing deviations.

10. The method of claim 5 , further comprising:
obtaining the compensation factors from the Lab Management System for adjustment of an optical prescription received from a Lens Design System calculator to compensate for the computed manufacturing deviations.

11. The method of claim 5 , further comprising:
identifying, from the computed manufacturing deviations, a substandard lens that has completed the surfacing process, wherein one or more measurements of the substandard lens are outside tolerances established for optical prescription values associated with the substandard lens; and
applying the computed compensation factors prior to repeating a manufacturing run to replace the substandard lens.

12. A non-transitory computer-readable medium comprising instructions, comprising instructions stored therein, which when executed by one or more processors, causes the one or more processors to perform a method comprising:
automatically computing manufacturing deviations in one or more optical lenses using nominal optical prescription values and stored measurements of lenses that have completed a surfacing process;
computing compensation factors for one or more future optical lens manufacturing runs based upon the manufacturing deviations, wherein the compensation factors correspond to one or more of an amount of lens surfacing equipment wear, a brand of lens surfacing equipment, a brand of consumable used, and a type of consumable used, and wherein the computing the compensation factors includes adjusting optical prescriptions;
receiving the compensation factors at a Lab Management System coupled to lens surfacing equipment;
applying, by the Lab Management System, the compensation factors during the one or more future optical lens manufacturing runs; and
adjusting an optical prescription to compensate for computed deviations in the lens surfacing equipment before sending the optical prescription to a Lens Design System.

13. The non-transitory computer-readable medium of claim 12 , wherein the method further comprises:
grouping the computed manufacturing deviations or the compensation factors or both by one or more categories comprising: Semi-Finish, product code, optical design, design vendor, Lens Design System, and material categories.

14. The non-transitory computer-readable medium of claim 12 , wherein the method further comprises:
computing statistical deviations based upon the computed manufacturing deviations; and
computing the compensation factors for the future optical lens manufacturing runs based upon the statistical deviations.

15. The non-transitory computer-readable medium of claim 12 , wherein the method further comprises:
obtaining the compensation factors to the Lab Management System for adjustment of commands provided to lens manufacturing equipment to compensate for the computed manufacturing deviations.

Assignees

• Essilor Int

Inventors

• Piraube Sebastien
• Gelb Brad J

Classifications

• G05B2219/45157

  Grind optical lens · CPC title

• B24B13/06 Primary

  grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes · CPC title

• G05B19/404

  characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia (G05B19/19, G05B19/41 take precedence) · CPC title

• G05B19/41875

  characterised by quality surveillance of production · CPC title

• B29D11/00

  Producing optical elements, e.g. lenses or prisms (grinding or polishing of optical elements B24B; constructional form of optical elements G02B; {optical parts of spectacles G02C7/00}) · CPC title