EP4344821A1 - Procédé de sélection automatique d'un processus de polissage pour une lentille - Google Patents

Procédé de sélection automatique d'un processus de polissage pour une lentille Download PDF

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Publication number
EP4344821A1
EP4344821A1 EP22306444.5A EP22306444A EP4344821A1 EP 4344821 A1 EP4344821 A1 EP 4344821A1 EP 22306444 A EP22306444 A EP 22306444A EP 4344821 A1 EP4344821 A1 EP 4344821A1
Authority
EP
European Patent Office
Prior art keywords
lens
frame
selecting
polishing process
embedded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22306444.5A
Other languages
German (de)
English (en)
Inventor
Damien BOUYNET
Benoit Holvoet-Vermaut
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EssilorLuxottica SA
Essilor International SAS
Original Assignee
Essilor International Compagnie Generale dOptique SA
Essilor International SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Essilor International Compagnie Generale dOptique SA, Essilor International SAS filed Critical Essilor International Compagnie Generale dOptique SA
Priority to EP22306444.5A priority Critical patent/EP4344821A1/fr
Priority to PCT/EP2023/076974 priority patent/WO2024068884A1/fr
Publication of EP4344821A1 publication Critical patent/EP4344821A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/06—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece

Definitions

  • the present invention relates to a method for selecting in an automated manner a polishing process for an edged lens fitted in a frame.
  • the polishing step In the field of edging technology for ophthalmic lenses, the polishing step is often regarded as a bottleneck, because this is the most impacting step in terms of equipment productivity. Indeed, even if only around 30 percent of eyeglass orders request polishing, the polishing step is a huge contributor to productivity savings.
  • An object of the present disclosure is to overcome the above-mentioned drawbacks of the prior art.
  • the present disclosure provides a method for selecting in an automated manner a polishing process for an edged lens fitted in a frame, remarkable in that it comprises:
  • the method according to the disclosure makes it possible to automatically decide whether the polishing process to be implemented should be a soft one or a standard one, without any human intervention. As a result, productivity is greatly improved.
  • the determining step is carried out by a calculation engine.
  • the determining step comprises comparing in an automated manner the maximum edge thickness of the lens with the frame thickness.
  • the frame thickness is provided by a tracer.
  • the frame thickness is extracted from a frame shape file.
  • the maximum edge thickness is obtained by comparing edge thicknesses of the lens at predetermined radii provided by a predetermined model of the lens and selecting the highest value among these edge thicknesses as the maximum edge thickness.
  • the present disclosure also provides a computer program product, remarkable in that it comprises one or more sequences of instructions that are accessible to a processor and that, when executed by that processor, cause that processor to implement a method for selecting in an automated manner a polishing process for an edged lens fitted in a frame, comprising:
  • the present disclosure further provides a non-transitory information storage medium, remarkable in that it stores one or more sequences of instructions that are accessible to a processor and that, when executed by that processor, cause that processor to implement a method for selecting in an automated manner a polishing process for an edged lens fitted in a frame, comprising:
  • the computer program product is advantageously configured for executing the method in any of its execution modes.
  • FIG. 1 is a flow diagram showing steps of a method according to the present disclosure, in a particular embodiment.
  • a method, or a step in a method that "comprises”, “has”, “contains”, or “includes” one or more steps or elements possesses those one or more steps or elements, but is not limited to possessing only those one or more steps or elements.
  • Figure 1 shows steps of a method according to the present disclosure for selecting in an automated manner a polishing process for an edged lens fitted in a frame, in a particular embodiment.
  • a first step 10 of the method comprises determining in automated manner whether the lens is embedded in the frame.
  • a lens is considered to be embedded in a frame when no edge part of the lens is visible from the outside part of the frame.
  • it means, as a basic rule, that the maximum edge thickness of the lens is lower than the minimum thickness of the frame.
  • As an optimized rule it means that the edge thickness of the lens is lower than the frame thickness at every angle of a predetermined value, for example every 10°.
  • This step may be carried out by a calculation engine.
  • Step 10 may for example comprise, in an embodiment where the above-mentioned basic rule is applied, comparing in an automated manner, for example in the calculation engine, the maximum edge thickness of the lens with the thickness of the frame.
  • the thickness of the frame may be provided by a tracer. It may be extracted from a frame shape file storing values of thicknesses for a plurality of frames having various shapes.
  • the maximum edge thickness of the lens may be obtained by using a predetermined model of the lens, defined as a full description of the tridimensional lens, comprising the front surface of the lens, the back surface of the lens and the center thickness of the lens, in a same referential.
  • the lens model will provide the values of the edge thickness of the lens at predetermined radii. Then, the highest value among these edge thickness values will be selected as the maximum edge thickness.
  • step 12 which consists in selecting a soft polishing process for the lens fitted and embedded in the frame. Soft polishing is well known per se and will thus not be described in detail here.
  • step 14 which consists in selecting a standard polishing process for the lens fitted, but not embedded, in the frame. Standard polishing is well known per se and will thus not be described in detail here.
  • Standard polishing makes it possible to obtain a shiny lens edge, whereas soft polishing is faster on the equipment and provides a lens edge that is not as shiny as the one obtained thanks to standard polishing.
  • a preliminary step may be performed, consisting of checking whether the order from the ECP or customer includes a request for polishing the edged lens fitted in the frame.
  • a computer program product comprises one or more sequences of instructions that are accessible to a processor and that, when executed by the processor, cause the processor to carry out steps of the method for selecting in an automated manner a polishing process for an edged lens fitted in a frame.
  • the processor is configured for carrying out steps 10, 12 and 14 as described above.
  • the software may be hosted for example remotely in a cloud, or locally in a computer.
  • sequence(s) of instructions may be stored in one or several non-transitory computer-readable storage medium/media, including a predetermined location in a cloud.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP22306444.5A 2022-09-29 2022-09-29 Procédé de sélection automatique d'un processus de polissage pour une lentille Pending EP4344821A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22306444.5A EP4344821A1 (fr) 2022-09-29 2022-09-29 Procédé de sélection automatique d'un processus de polissage pour une lentille
PCT/EP2023/076974 WO2024068884A1 (fr) 2022-09-29 2023-09-28 Procédé de sélection automatique d'un processus de polissage pour une lentille

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22306444.5A EP4344821A1 (fr) 2022-09-29 2022-09-29 Procédé de sélection automatique d'un processus de polissage pour une lentille

Publications (1)

Publication Number Publication Date
EP4344821A1 true EP4344821A1 (fr) 2024-04-03

Family

ID=83691723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22306444.5A Pending EP4344821A1 (fr) 2022-09-29 2022-09-29 Procédé de sélection automatique d'un processus de polissage pour une lentille

Country Status (2)

Country Link
EP (1) EP4344821A1 (fr)
WO (1) WO2024068884A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0999011A1 (fr) * 1998-10-05 2000-05-10 Hoya Corporation Procédé d' usinage pour lentilles
US20040209547A1 (en) * 2003-04-16 2004-10-21 Kabushiki Kaisha Topcon Method for processing chamfering of eyeglass lens and apparatus for processing the same
WO2016108063A1 (fr) * 2014-12-31 2016-07-07 Essilor International (Compagnie Generale D'optique) Processus de délignage de lentilles ophtalmiques par calcul
US20180284728A1 (en) * 2015-10-09 2018-10-04 Essilor International Method for generating settings for machining an optical lens
WO2019106399A1 (fr) * 2017-11-29 2019-06-06 Carl Zeiss Vision International Gmbh Procédé de fabrication d'un verre de lunettes, verre de lunettes et procédé de conception de verre
US20190265683A1 (en) * 2016-05-25 2019-08-29 Schneider Gmbh & Co. Kg Method and system for processing optical lenses

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0999011A1 (fr) * 1998-10-05 2000-05-10 Hoya Corporation Procédé d' usinage pour lentilles
US20040209547A1 (en) * 2003-04-16 2004-10-21 Kabushiki Kaisha Topcon Method for processing chamfering of eyeglass lens and apparatus for processing the same
WO2016108063A1 (fr) * 2014-12-31 2016-07-07 Essilor International (Compagnie Generale D'optique) Processus de délignage de lentilles ophtalmiques par calcul
US20180284728A1 (en) * 2015-10-09 2018-10-04 Essilor International Method for generating settings for machining an optical lens
US20190265683A1 (en) * 2016-05-25 2019-08-29 Schneider Gmbh & Co. Kg Method and system for processing optical lenses
WO2019106399A1 (fr) * 2017-11-29 2019-06-06 Carl Zeiss Vision International Gmbh Procédé de fabrication d'un verre de lunettes, verre de lunettes et procédé de conception de verre

Also Published As

Publication number Publication date
WO2024068884A1 (fr) 2024-04-04

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