EP3470171B1 - Procédé amélioré de préparation d'une ébauche de lentille pour une opération de surfaçage de celle-ci - Google Patents

Procédé amélioré de préparation d'une ébauche de lentille pour une opération de surfaçage de celle-ci Download PDF

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Publication number
EP3470171B1
EP3470171B1 EP17306387.6A EP17306387A EP3470171B1 EP 3470171 B1 EP3470171 B1 EP 3470171B1 EP 17306387 A EP17306387 A EP 17306387A EP 3470171 B1 EP3470171 B1 EP 3470171B1
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EP
European Patent Office
Prior art keywords
lens
crib
diameter
temporary
surfacing
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EP17306387.6A
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German (de)
English (en)
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EP3470171A1 (fr
Inventor
Sébastien PIRAUBE
Fred ADOLOFO
Alain Mathieu
Xavier Bultez
Jerome Moine
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EssilorLuxottica SA
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Essilor International Compagnie Generale dOptique SA
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Application filed by Essilor International Compagnie Generale dOptique SA filed Critical Essilor International Compagnie Generale dOptique SA
Priority to EP17306387.6A priority Critical patent/EP3470171B1/fr
Priority to PCT/EP2018/077270 priority patent/WO2019072742A1/fr
Priority to MX2020003837A priority patent/MX2020003837A/es
Priority to US16/754,222 priority patent/US20200276684A1/en
Priority to CN201880065844.0A priority patent/CN111201111B/zh
Publication of EP3470171A1 publication Critical patent/EP3470171A1/fr
Priority to PH12020550199A priority patent/PH12020550199A1/en
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Publication of EP3470171B1 publication Critical patent/EP3470171B1/fr
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    • 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
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B24B13/0055—Positioning of lenses; Marking of lenses

Definitions

  • the invention relates to the field of industrial surfacing processes to manufacture ophthalmic lenses.
  • the invention relates more particularly to a method of optimizing the shape of the periphery that the surfacing of a lens blank destined to be transformed into the final lens is to convey to the lens blank thereafter.
  • a spectacle lens is specifically manufactured according to every wearer's needs which may take the form of specifications defined in a prescription established by an ophthalmologist.
  • a lens blank is submitted to various steps to form the desired lens, in particular one of surfacing during which the shape of the lens blank is processed to produce what can be referred to as a surfaced lens so that the latter exhibits desired optical properties.
  • the surfacing step includes processing the lens blank to reduce its outer shape to a shape which is typically (although not necessarily) round, exhibiting a chosen diameter, or crib diameter. This operation is usually performed so that the resulting surfaced lens may then be more easily held during following steps, which typically include one during which the lens is immersed in a coating fluid while it is held by a device such as a ring.
  • the document WO 2006/084771 A1 concerns a method for manufacturing a spectacle lens, and more specifically methods for eliminating sharp edges that typically result during the production of uncut lenses.
  • the crib diameter is firstly defined as a two parameters-function depending on a blocking location.
  • a step of blocking is performed during the method of manufacturing the spectacle lens to block the lens blank with a holding block.
  • This holding block allows handling the lens blank during the various production steps, while a circular disk of bonding alloy is formed between the lens blank and a holding block to attach the lens blank to the holding block prior to cribbing, cutting, or surfacing.
  • this process of cribbing is subject to various constraints, which can easily translate into an extremely varied population of potential crib diameters which result therefrom.
  • the invention seeks to improve this situation.
  • the invention relates to a method of preparing a lens blank for a further operation of surfacing of said lens blank configured to transform the lens blank into a surfaced lens at the end thereof for further transformation into a lens having a lens shape and destined to be coupled to a frame, the operation of surfacing including processing the lens blank so that the surfaced lens exhibits a crib diameter, the method being implemented using a processing module and comprising :
  • the crib diameter is chosen as corresponding to the smallest discrete value which is superior to the temporary crib diameter.
  • the method further comprises, when a surface extension configuration is destined to be applied to the operation of surfacing, generating a surface file to be used during the operation of surfacing for generating the lens shape so that the lens shape is circular with a diameter corresponding to the crib diameter.
  • said one or more predetermined discrete value is formed by a single value.
  • the temporary crib diameter is chosen as the smallest value which satisfies said set of constraints.
  • the set of constraints includes a third constraint according to which the temporary crib diameter is superior or equal to a minimum crib diameter of an apparatus destined to be used to reduce the diameter of the lens blank during the operation of surfacing.
  • the temporary crib diameter is taken as superior or equal to a lens shape parameter defined based on twice a maximum radius of the lens shape.
  • the lens shape parameter is taken equal as twice the radius of the lens shape when the generated lens shape is circular.
  • the lens shape parameter is taken equal as twice the sum of the maximum radius and of a margin defined based on a shape of the frame the lens is destined to be coupled to.
  • the temporary crib diameter is chosen superior or equal to a reference parameter defined based on twice a distance between a center of the lens shape in a blocking and turning referential of the lens blank during the operation of surfacing and the reference point of the lens blank which is the farthest away from said center.
  • the reference parameter is taken equal to twice the sum of said distance and of a predetermined margin.
  • the invention also relates to a computer program comprising instructions destined to be executed by a processor for the implementation of the method as defined above.
  • the invention also relates to a method of surfacing a lens blank configured to transform the lens blank into a surfaced lens at the end thereof for further transformation into a lens having a lens shape and destined to be coupled to a frame, the method comprising:
  • the invention also relates to a device for preparing a lens blank for a further operation of surfacing of said lens blank configured to transform the lens blank into a surfaced lens having a lens shape at the end thereof for further transformation into a lens to be coupled to a frame, the operation of surfacing including processing the lens blank so that the surfaced lens exhibits a crib diameter, the device comprising a processing module configured to:
  • Figure 1 illustrates a lens blank BLA which is used in the context of the invention with a view of manufacturing an ophthalmic lens, or finished lens, LEN designed to exhibit optical properties.
  • the lens LEN which is obtained advantageously presents eyesight correction properties which address eyesight issues of its intended wearer.
  • the lens LEN is typically designed to be coupled to a frame (now shown) to define spectacles therewith which are to be worn by the wearer.
  • the lens blank BLA which is designed to be processed into the resulting lens is put through a series of operations whose general respective principles are typically known.
  • One of these operations, on which the invention focuses, is one of surfacing the lens blank to produce a surfaced lens SLE therefrom which is itself to be put through further operations to produce the lens LEN. It should be noted that the surfaced lens LEN advantageously exhibits the target optical properties of the lens LEN.
  • the lens blank BLA which is used during this step is a semi-finished lens bank.
  • one of its surfaces has already been processed to a desired shape.
  • the front surface is thus already processed when the surfacing operation is to take place, only the back surface being then processed.
  • the term "lens blank” is to be understood as encompassing configurations in which the lens blank is semi-finished, and configurations in which it is not, although the configurations in which it is are preferred.
  • the step generally revolves around some of the matter of the lens blank being removed therefrom so as to shape the lens blank BLA into the surfaced lens LEN.
  • this operation includes a step of cribbing the lens blank BLA, which corresponds to a step during which the external shape of the lens blank is reduced in terms of dimensions to a diameter which is referred to as a crib diameter D crib .
  • the step of cribbing results in the surfaced lens SLE having an external shape which may be circular or not.
  • the term "diameter” is to be understood as referring to the maximal diameter unless specified otherwise.
  • This external shape is destined to come in contact with a piece of equipment during a further step of the process, typically one of coating the surfaced lens.
  • the external shape of the surfaced lens is held by a ring used to immerse the surfaced lens in a coating material.
  • Figure 2 illustrates a system SYS according to the invention, the system SYS being configured to be used during the operation of surfacing in general to shape the lens blank BLA into the surfaced lens SLE.
  • the system SYS includes a generator GEN which is adapted to be used during the surface per se to remove matter from the lens blank BLA to shape the latter into the surfaced lens SLE.
  • the system SYS includes an apparatus APP adapted to prepare at least in part the surfacing of the lens blank BLA per se. More specifically, as detailed below, the apparatus APP is configured to determine the crib diameter noted D crib hereafter, which is applied to the lens blank BLA during the operation of surfacing.
  • the generator GEN advantageously includes a grinding module GRIN and/or a cutting module CUT which are respectively configured to remove some of the matter of the lens blank BLA to shape the lens blank BLA into the generated lens LEN through grinding, respectively cutting.
  • the grinding module and the cutting module are movable relative to a body of the generator by which the lens blank BLA is held.
  • the lens blank BLA is secured to a support which is held by the generator.
  • the lens blank BLA is held in a manner which advantageously allows the lens blank to be moved relative to the body of the generator, typically to rotate relative thereto.
  • the apparatus APP is configured to prepare the operation of surfacing of the lens blank, and in particular to determine the cribbing diameter to which the lens blank BLA is brought during this operation.
  • the apparatus APP may be a stand-alone apparatus specifically dedicated to the preparation of the surfacing.
  • the apparatus APP is a computer device. It includes a processing module PROC, a memory MEM, a communication interface COM, and a human-machine interface HMI.
  • the processing module PROC is configured to carry out the method of preparing a lens blank BLA in the sense of the invention, which is detailed hereafter.
  • the processing module PROC includes one or more processor CPU which is configured to process instructions for the implementation of the method according to the invention.
  • This processor may be of any known type.
  • the memory MEM is configured to store computer programs and data which are destined to be processed by the processing module PROC for the operations of the apparatus APP. Typically, it may include one or more programs defining an operating system via which the apparatus performs routine operations. Advantageously, it also includes a computer program PRG comprising instructions destined to be executed by the processing module MOD for the implementation of the method according to the invention detailed below.
  • the data in the context of the invention, they include input data ID which are configured to describe the shape of the lens LEN, or lens shape, which is to be obtained at the end of the manufacturing process.
  • this lens shape is to be distinguished from the shape of the surfaced lens SLE, or surfaced lens shape, which is that of the result of the processing of the lens blank BLA through the surfacing of the latter.
  • the input data ID may advantageously include a model of the lens, i.e. of the manufactured lens.
  • this model is expressed in a blocking/turning referential of the lens, i.e. a referential which uses the center of rotation of the lens blank during the surfacing as its origin and with one or more of its axis corresponding to an axis of rotation of the lens blank during the surfacing.
  • the model includes a model of the front surface and back surface of the lens, as well as kinematics between these two surfaces.
  • the input data ID also include data which describe the lens shape, i.e. the shape of the manufactured lens LEN.
  • these data include the traced shape of the lens for the wearer.
  • they also include a diameter information. For instance, this is so when the optical properties of the lens call for a diameter which is considered untypical.
  • the memory MEM may also contain configuration data CFGD which define preferences for the operation of surfacing which is to occur following the preparation.
  • the configuration data CFGD advantageously include a frame shape margin M FS whose value is predetermined.
  • This frame shape margin corresponds to a margin which is provided for the surfaced lens SLE to ensure a good cooperation between the lens LEN and the frame FRA once the lens has been further processed.
  • the configuration data CFGD advantageously include a step cribbing parameter which defines whether a step cribbing configuration is enabled for the surfacing, whereby the crib diameter D crib is chosen among at least one predetermined discrete value Val i . It should be noted that there may be a single discrete value.
  • the configuration data CFGD advantageously include a list of preferred diameters. For instance, these preferred diameters correspond to the discrete values Val i among which the crib diameter is chosen.
  • the configuration data CFGD advantageously include a Minimum Generator Crib Diameter, noted MinGen, which corresponds to a minimum crib diameter that the generator GEN is adapted to provide.
  • MinGen Minimum Generator Crib Diameter
  • the configuration data CFGD advantageously include a surface extension parameter which describes whether a surface extension configuration is enabled for the surfacing, whereby the surfaced lens has a shape which is purposefully extended to be circular.
  • the data contained in the memory MEM advantageously also include reference data REFD which define the location of reference points P REF defined on the lens blank and which together identify an optical center of the lens LEN.
  • the location of the references points is for instance expressed in a given referential, such as the PRP referential, for Prism Reference Point referential.
  • the Prism Reference Point corresponds to the optical center of the lens. This referential includes three axis passing through the Prism Reference Point, for instance a horizontal axis, a vertical axis, and one passing through the lens and normal to the front surface of the lens. This referential may correspond to the blocking/turning referential.
  • the reference points P REF may take the form of circles, such as microcircles.
  • the human-machine interface HMI is adapted to allow an operator to input data into the apparatus APP and/or to display data for the operator.
  • the data in question may be any data, in particular that contained in the memory which form all or part of the configuration data CFGD, the input data ID or the reference data REFD.
  • the human-machine interface HMI may include an input device, such as a keyboard, a mouse, and the like.
  • the input device may also include a screen, optionally combined with the mouse and/or the keyboard to define a touch sensitive screen.
  • the communication interface COM As for the communication interface COM, it is adapted for communication between the apparatus APP and one or more distant device.
  • Any cable and/or non-cable communication technology may be supported by the communication module COMM.
  • a method of manufacturing a lens LEN (shown by a dashed line on Figure 1 ) from a lens blank BLA according to the invention will now be described in reference to the Figures, including Figure 4 .
  • the manufacturing includes a step of surfacing a lens blank BLA into a surfaced lens SLE during a step S1.
  • the process also includes further processing of the surfaced lens SLE into the desired lens LEN during a step S2.
  • This further processing is not the core aspect of the invention, and will therefore not be discussed in more details. In effect, any known technique may be applied to that end.
  • step S1 it includes the preparation noted PREP of the surfacing of the lens blank BLA, and the surfacing noted SURF of the lens blank BLA per se.
  • the determination of the crib diameter D crib which is conveyed to the surfaced lens SLE during the surfacing SURF. It is carried out by the apparatus APP, and in particular by the processing module PROC using the memory MEM.
  • this determination relies on defining a temporary crib diameter D temp which satisfies a set of constraints, and choosing the crib diameter D crib based on the temporary crib diameter D temp so that when the step cribbing configuration is destined to be applied to the operation of surfacing SURF, the crib diameter D crib is chosen among at least one predetermined discrete value.
  • the set of constraints includes at least one constraint, and advantageously a plurality of constraints.
  • the temporary crib diameter D temp is large enough for the surfaced lens SLE having said temporary crib diameter to be suitable to be processed into said lens.
  • the temporary crib diameter D temp is chosen so that if the surfaced lens shape were to have this temporary crib diameter, obtaining the lens from the surfaced lens would be possible.
  • the temporary crib diameter D temp is determined to verify this first constraint during a step T1.
  • the temporary crib diameter D temp is taken as superior or equal to a lens shape parameter defined based on twice a maximum radius of the lens shape.
  • the lens shape parameter, and therefore the temporary crib diameter D temp is set to twice the radius of the lens shape, which also corresponds to its maximum radius.
  • the lens shape parameter is set to twice the sum of the maximum radius of the lens shape and of the frame shape margin M FS .
  • This margin is indeed chosen based on the shape of the frame the lens is destined to be coupled to. Typically, this margin is designed to ensure that the cribbing diameter will not come too close to the final lens shape, thus avoiding any lack of material inside the frame.
  • the set of constraints advantageously comprises a second constraint whereby the temporary crib diameter D temp is large enough for the surfaced lens having said temporary crib diameter to include the plurality of reference points P REF .
  • the constraint aims to ensure that the reference points are not removed from the lens blank while the latter is cribbed.
  • the temporary crib diameter D temp is determined to verify the second constraint during a step T2.
  • the temporary crib diameter D temp is chosen superior or equal to a reference parameter defined based on twice a distance between the center of the lens shape in the blocking/turning turning referential of the lens blank during the operation of surfacing and the reference point of the lens blank which is the farthest away from said center.
  • a reference parameter defined based on twice a distance between the center of the lens shape in the blocking/turning turning referential of the lens blank during the operation of surfacing and the reference point of the lens blank which is the farthest away from said center.
  • the distance between this center and the reference point is determined, the obtained distance is summed to a margin distance, and the highest value obtained among the various reference points, noted Rmc for instance, is chosen as the reference parameter.
  • This margin distance is for instance chosen as 1 mm.
  • the temporary crib diameter D temp is set to twice the value of Rmc.
  • the set of constraints includes a third constraint according to which the temporary crib diameter is superior or equal to the minimum generator crib diameter MinGen.
  • this constraint aims to ensure that the crib diameter is realistic in view of the limitations of the generator GEN.
  • the temporary crib diameter D temp is determined so as to verify the third constraint during a step T3.
  • the current temporary crib diameter D temp is set to the minimum generator crib diameter MinGen.
  • the steps T1 to T3 may be implemented in any order.
  • the temporary crib diameter D temp is advantageously set to zero prior to the first of these steps.
  • the temporary crib diameter D temp is advantageously chosen as the smallest value which satisfies the set of constraints.
  • step T4 which preferably takes places after the steps T1 to T3, it is determined whether the step cribbing configuration is enabled for the surfacing SURF. This operation is carried out based on the configuration data CFGD.
  • step cribbing parameter is analyzed to see whether this is the case or not.
  • the crib diameter D crib is chosen based on the current temporary crib diameter D temp .
  • it is taken equal to the current temporary crib diameter D temp .
  • step cribbing configuration is enabled, then it is determined whether the preferred diameters contained in the configuration data CFGD comprise at least one preferred diameter which is superior to the current temporary crib diameter D temp .
  • the current temporary crib diameter D temp is set to a value chosen among these values.
  • it is then taken equal to the smallest preferred diameter which is superior to the current temporary crib diameter D temp .
  • the current temporary crib diameter D temp is kept.
  • the crib diameter D crib is then chosen based on the temporary crib diameter D temp .
  • it is taken equal to the temporary crib diameter D temp .
  • the crib diameter D crib has a given value, which forms the final value of the crib diameter.
  • step T5 it is then determined whether the surface extension configuration is enabled for the surfacing SURF.
  • This surface file contains a definition of the shape of the surfaced lens. It is destined to be used during the operation of surfacing SURF for generating the shape of the surfaced lens shape so that the shape of the surfaced lens is circular with a diameter corresponding to the crib diameter. Typically, this surface file is destined to be used as input by the generator to determine the details of the processing of the lens blank BLA.
  • this step includes the generation of instructions destined to the generator GEN so that the shape of the surfaced lens is to be brought to a circular shape having the crib diameter D crib during the surfacing SURF, whereby this shape can be seen as extended relative to a configuration in which the surface extension configuration is not enabled.
  • the crib diameter D crib is output by the apparatus for the generator GEN to use as input for the surfacing SURF which takes place thereafter.
  • the surfacing SURF advantageously uses the crib diameter D crib to process the lens blank BLA, as well as various other data such as data which reflect those contained in the memory MEM of the apparatus.
  • This output of the preparation PREP is conveyed through the communication module COM and/or through the human-machine interface HMI, whereby it is then transferred to the generator GEN.
  • the lens blank is then processed by the generator GEN, the resulting surfaced lens SLE having the crib diameter D crib determined during the preparation PREP.
  • the invention provides several advantages.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Eyeglasses (AREA)
  • Lenses (AREA)

Claims (14)

  1. Procédé de préparation d'une ébauche de lentille (BLA) pour une opération ultérieure de surfaçage de ladite ébauche de lentille configurée pour transformer l'ébauche de lentille en une lentille surfacée (SLE) aux fins d'une transformation ultérieure en une lentille (LEN) ayant une forme de lentille et destinée à être couplée à une monture, l'opération de surfaçage comprenant le traitement de l'ébauche de lentille (BLA) de sorte que la lentille surfacée présente un diamètre de découpe (Dcrib), le procédé étant mis en œuvre en utilisant un module de traitement et comprenant :
    - sur la base de données d'entrée (ID) qui définissent la forme de lentille, la définition d'un diamètre de découpe temporaire (Dtemp) de sorte que ledit diamètre de découpe temporaire satisfait à un ensemble de contraintes qui comprend au moins :
    - une première contrainte selon laquelle le diamètre de découpe temporaire (Dtemp) est suffisamment grand pour que la lentille surfacée ayant ledit diamètre de découpe temporaire soit adaptée pour être transformée en ladite lentille (LEN),
    - une deuxième contrainte selon laquelle le diamètre de découpe temporaire est suffisamment grand pour que la lentille surfacée ayant ledit diamètre de découpe temporaire comprenne une pluralité de points de référence (PREF) définis sur l'ébauche de lentille et qui, ensemble, identifient un centre optique de la lentille,
    - le choix du diamètre de découpe (Dcrib) en fonction du diamètre de découpe temporaire (Dtemp), ledit choix du diamètre de découpe étant configuré de telle sorte que lorsqu'une configuration de découpe par paliers est destinée à être appliquée à l'opération de surfaçage, ledit diamètre de découpe est choisi parmi au moins une valeur discrète prédéterminée (Vali).
  2. Procédé selon la revendication 1, dans lequel le diamètre de découpe (Dcrib) est choisi comme correspondant à la plus petite valeur discrète qui est supérieure au diamètre de découpe temporaire (Dtemp).
  3. Procédé selon la revendication 1 ou 2, comprenant en outre, lorsqu'une configuration d'extension de surface est destinée à être appliquée à l'opération de surfaçage, la génération d'un fichier de surface à utiliser pendant l'opération de surfaçage pour générer la forme de lentille de sorte que la forme de lentille est circulaire avec un diamètre correspondant au diamètre de découpe (Dcrib) .
  4. Procédé selon la revendication 2 ou 3, dans lequel lesdites une ou plusieurs valeurs discrètes prédéterminées sont formées par une seule valeur.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel le diamètre de découpe temporaire (Dtemp) est choisi comme la plus petite valeur qui satisfait ledit ensemble de contraintes.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'ensemble de contraintes comprend une troisième contrainte selon laquelle le diamètre de découpe temporaire est supérieur ou égal à un diamètre de découpe minimal d'un appareil destiné à être utilisé pour réduire le diamètre de l'ébauche de lentille pendant l'opération de surfaçage.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel, pour satisfaire à la première contrainte, le diamètre de découpe temporaire est pris supérieur ou égal à un paramètre de forme de lentille défini sur la base du double d'un rayon maximum de la forme de lentille.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel le paramètre de forme de lentille est pris égal à deux fois le rayon de la forme de lentille lorsque la forme de lentille générée est circulaire.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel le paramètre de forme de lentille est pris égal au double de la somme du rayon maximum et d'une marge définie sur la base d'une forme de la monture à laquelle la lentille est destinée à être couplée.
  10. Procédé selon l'une quelconque des revendications précédentes, dans lequel pour satisfaire à la deuxième contrainte, le diamètre de découpe temporaire (Dtemp) est choisi supérieur ou égal à un paramètre de référence défini sur la base de deux fois une distance entre un centre de la forme de lentille dans un référentiel de blocage et de rotation de l'ébauche de lentille pendant l'opération de surfaçage et le point de référence de l'ébauche de lentille qui est le plus éloigné dudit centre.
  11. Procédé selon la revendication 10, dans lequel le paramètre de référence est pris égal à deux fois la somme de ladite distance et d'une marge prédéterminée.
  12. Programme informatique comprenant des instructions destinées à être exécutées par un processeur pour la mise en œuvre du procédé selon l'une quelconque des revendications précédentes.
  13. Procédé de surfaçage d'une ébauche de lentille (BLA) configuré pour transformer l'ébauche de lentille en une lentille surfacée (SLE) aux fins d'une transformation ultérieure en une lentille ayant une forme de lentille et destinée à être couplée à une monture, le procédé comprenant :
    - la préparation de l'ébauche de lentille (BLA) pour le surfaçage en utilisant un procédé de préparation d'une ébauche de lentille selon l'une quelconque des revendications 1 à 11 pour obtenir un diamètre de découpe, et
    - le surfaçage de l'ébauche de lentille, ledit surfaçage de l'ébauche de lentille comprenant le traitement de l'ébauche de lentille de sorte que la lentille surfacée présente le diamètre de découpe.
  14. Dispositif pour préparer une ébauche de lentille (BLA) pour une opération ultérieure de surfaçage de ladite ébauche de lentille, configuré pour transformer l'ébauche de lentille en une lentille surfacée (SLE) ayant une forme de lentille aux fins d'une transformation ultérieure en une lentille (LEN) destinée à être couplée à une monture, l'opération de surfaçage comprenant le traitement de l'ébauche de lentille de sorte que la lentille surfacée (SLE) présente un diamètre de découpe, le dispositif comprenant un module de traitement (PROC) configuré pour :
    - sur la base de données d'entrée qui définissent la forme de lentille, définir un diamètre de découpe temporaire (Dtemp) de sorte que ledit diamètre de découpe temporaire (Dcrib) satisfait à un ensemble de contraintes qui comprend au moins :
    - une première contrainte selon laquelle le diamètre de découpe temporaire est suffisamment grand pour que la lentille surfacée ayant ledit diamètre de découpe temporaire soit adapté pour être transformée en ladite lentille,
    - une deuxième contrainte selon laquelle le diamètre de découpe temporaire est suffisamment grand pour que la lentille surfacée ayant ledit diamètre de découpe temporaire comprenne une pluralité de points de référence définis sur l'ébauche de lentille et qui, ensemble, identifient un centre optique de la lentille,
    - choisir le diamètre de découpe (Dcrib) en fonction du diamètre de découpe temporaire (Dtemp), le module de traitement étant configuré pour choisir le diamètre de découpe de sorte que, en réponse à une configuration de criblage par étapes destinée à être appliquée à l'opération de surfaçage, ledit diamètre de découpe est choisi parmi au moins une valeur discrète prédéterminée.
EP17306387.6A 2017-10-13 2017-10-13 Procédé amélioré de préparation d'une ébauche de lentille pour une opération de surfaçage de celle-ci Active EP3470171B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP17306387.6A EP3470171B1 (fr) 2017-10-13 2017-10-13 Procédé amélioré de préparation d'une ébauche de lentille pour une opération de surfaçage de celle-ci
PCT/EP2018/077270 WO2019072742A1 (fr) 2017-10-13 2018-10-08 Procédé amélioré de préparation d'une ébauche de lentille pour une opération de surfaçage de celle-ci
MX2020003837A MX2020003837A (es) 2017-10-13 2018-10-08 Un metodo mejorado para preparar un primordio de lente para aplicarle una operacion de tecnologia de superficie digital.
US16/754,222 US20200276684A1 (en) 2017-10-13 2018-10-08 An improved method of preparing a lens blank for an operation of surfacing thereof
CN201880065844.0A CN111201111B (zh) 2017-10-13 2018-10-08 准备镜片毛坯用于其表面处理操作的改进方法
PH12020550199A PH12020550199A1 (en) 2017-10-13 2020-04-01 An improved method of preparing a lens blank for an operation of surfacing thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17306387.6A EP3470171B1 (fr) 2017-10-13 2017-10-13 Procédé amélioré de préparation d'une ébauche de lentille pour une opération de surfaçage de celle-ci

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EP3470171A1 EP3470171A1 (fr) 2019-04-17
EP3470171B1 true EP3470171B1 (fr) 2021-01-20

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EP17306387.6A Active EP3470171B1 (fr) 2017-10-13 2017-10-13 Procédé amélioré de préparation d'une ébauche de lentille pour une opération de surfaçage de celle-ci

Country Status (6)

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US (1) US20200276684A1 (fr)
EP (1) EP3470171B1 (fr)
CN (1) CN111201111B (fr)
MX (1) MX2020003837A (fr)
PH (1) PH12020550199A1 (fr)
WO (1) WO2019072742A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485771A (en) * 1991-09-27 1996-01-23 Coburn Optical Industries, Inc. Apparatus for generating ophthalmic products from blanks and a method of operating same
US7980920B2 (en) * 2004-06-30 2011-07-19 Hoya Corporation Spectacle lens manufacturing method
PL1855838T3 (pl) * 2005-02-14 2009-03-31 Essilor Int Proces dla wytwarzania soczewek okularowych
FR2900853B1 (fr) * 2006-05-10 2009-01-23 Essilor Int Procede et dispositif de detourage d'une lentille glissante par decoupage de ladite lentille
JP2009125877A (ja) * 2007-11-26 2009-06-11 Hoya Corp レンズ保持具およびレンズの曲面研磨方法
CN103930822B (zh) * 2011-11-16 2016-08-17 埃西勒国际通用光学公司 用于确定半成品镜片毛坯的方法
FR2997330B1 (fr) * 2012-10-30 2015-04-03 Essilor Int Procede de fabrication par usinage de lentilles ophtalmiques
LU92190B1 (en) * 2013-05-06 2014-11-07 Satisloh Gmbh Multi part blocking piece

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
MX2020003837A (es) 2020-08-06
CN111201111A (zh) 2020-05-26
WO2019072742A1 (fr) 2019-04-18
EP3470171A1 (fr) 2019-04-17
US20200276684A1 (en) 2020-09-03
PH12020550199A1 (en) 2021-03-01
CN111201111B (zh) 2023-01-06

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