EP2024135B1 - Device and method of trimming a lens including verification of the adequacy of a lock adapter of said lens with a characteristic of this lens or its desired shape - Google Patents

Device and method of trimming a lens including verification of the adequacy of a lock adapter of said lens with a characteristic of this lens or its desired shape Download PDF

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Publication number
EP2024135B1
EP2024135B1 EP07731450A EP07731450A EP2024135B1 EP 2024135 B1 EP2024135 B1 EP 2024135B1 EP 07731450 A EP07731450 A EP 07731450A EP 07731450 A EP07731450 A EP 07731450A EP 2024135 B1 EP2024135 B1 EP 2024135B1
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EP
European Patent Office
Prior art keywords
lens
adapter
adequacy
verification
locking adapter
Prior art date
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Active
Application number
EP07731450A
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German (de)
French (fr)
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EP2024135A1 (en
Inventor
Fabien Divo
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
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Essilor International Compagnie Generale dOptique SA
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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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B24B9/148—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms electrically, e.g. numerically, controlled
    • 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 present invention generally relates to the mounting of ophthalmic lenses of a pair of corrective glasses on a mount and is more particularly directed to a device and a method of trimming a lens held by a locking adapter.
  • the trimming of a lens for mounting in or on the frame chosen by the future carrier, is to modify the contour of the lens to adapt it to this frame and / or to the desired lens shape.
  • the trimming of the lens is performed on a numerically controlled grinder which has means for holding and rotating the lens and several wheels suitable for the various operations to be performed.
  • the lens is first locked on the holding and driving means in a known configuration so that its optical reference is known and operations can be performed accurately with reference to this reference. It is understood that this blocking, accompanied by the storage of the optical reference system, makes it possible to define and physically materialize on the lens a geometric reference system in which the points and directions characteristic of the lens, necessary for the coherence of this with the position of the pupil, as well as the clipping values so that these points and characteristic directions are properly positioned in the frame.
  • the means for holding and rotating drive generally comprise means for supporting the lens and an adapter attached to the support means and applied to the face or faces of the lens to ensure its locking without slippage.
  • adapters There are several sizes of adapters and the adapter to be used is chosen according to the geometric characteristics (size and shape) of the final desired contour of the lens and the position of the adapter with respect to this contour, as well as depending on the characteristics of the machining cycle (in particular the torque exerted on the lens by the machining tool).
  • the adapter placed on the lens may not correspond to the desired adapter to perform the intended machining cycle and obtain the desired contour.
  • the adapter applied is greater than the size of the desired contour on at least a portion of this desired contour, the adapter will be machined by the machining tool.
  • the size of the adapter applied is smaller than the size of the adapter provided, the adapter may not be able to properly rotate the lens and, because of the torque exerted on it by the machining tool, the lens may slip relative to the lens lock adapter.
  • the centering of the lens in particular the axis (that is to say, the angular orientation of the lens in the reference frame of the grinder) is then modified and the resulting contour of the lens is different. , relative to its optical reference, the desired final contour after clipping.
  • the object of the present invention is to allow an efficient, accurate and reliable clipping of the lenses.
  • the subject of the invention is also a device for trimming a lens
  • a device for trimming a lens comprising means for supporting the lens, means for machining the lens, means for relative transverse displacement of the lens relative to the machining means and electronic processing means adapted to drive the displacement means for trimming the lens according to a desired contour according to a programmed machining cycle, the support means comprising at least one lens locking adapter applied to a face of said lens, in which probing means are provided, with or without contact of the adapter and wherein the electronic processing means are adapted to control these probing means so that they achieve an acquisition of at least one geometric characteristic of the locking adapter.
  • a geometric feature of the adapter determines the size and geometric configuration of the adapter relative to the lens. It is then possible to verify that the geometric configuration of the adapter with respect to the lens allows the contouring to be desired according to the desired contour without machining the adapter. It is also possible to check whether the geometrical configuration of the adapter, possibly taking into account a characteristic of the lens such as the more or less sliding nature of its surface coating, is adapted so that the adapter realizes the rotational drive of the lens without slipping. This verification of the adequacy between the lens and the adapter makes it possible to achieve efficient, precise and reliable clipping of the lenses.
  • said verification of suitability comprises determining the radial extent of the locking adapter relative to the desired final contour of the lens.
  • the determination of the radial extent makes it possible to know the diameter of the adapter and thus to verify, taking into account the position of the adapter with respect to the lens, that, on the one hand, the diameter of this adapter does not overflow not beyond the desired contour of the lens and, secondly, that this diameter is sufficient to ensure friction between the adapter and the lens adapted to drive the rotation of the lens without sliding.
  • said verification of suitability comprises carrying out the test according to which, if the radial extent of the locking adapter exceeds a threshold of proximity of the desired final contour of the lens to at least part of this desired contour, the adapter is replaced by another of smaller radial extent.
  • conditional step according to which, if said adequacy check results in a negative result, at least one of the following operations is performed: replacement of the blocking adapter by another blocking adapter, modifying at least one characteristic of the machining cycle of the lens, cutting the lens, at least in part, by cutting in the said lens.
  • conditional step according to which, if said adequacy check results in a positive result, the lens is machined by grinding the edge of the lens, without replace the adapter or change the programmed machining cycle.
  • said adequacy check comprises verifying the adequacy of said acquired geometric characteristic of the locking adapter with the wettability angle of the corresponding face of the lens.
  • conditional step according to which if said acquired geometric characteristic of the blocking adapter is not in adequacy with the angle of wettability of the lens, it replaces the blocking adapter by another larger radial expansion blocking adapter and / or modifying at least one characteristic of the machining cycle of the lens and / or the lens is trimmed at least in part by cutting in full matter of said lens.
  • the diameter of the adapter can be increased to increase the friction surface between the adapter and the lens.
  • the cutting tool is much smaller diameter than a machining tool such as a grinding wheel and the cutting tool is machining inside the lens which allows to quickly approach the desired contour with a minimum of energy dissipated between the cutting tool and the lens.
  • conditional step according to which if said acquired geometric characteristic of the locking adapter is in adequacy with the angle of wettability of the lens, machining of the lens by grinding the edge of the lens without replacing the adapter or changing the programmed machining cycle.
  • FIG. 1 To the figure 1 there is shown a digital trimming device 6 adapted to change the contour of the ophthalmic lens to fit that of the frame or "circle" of a selected frame.
  • This device comprises a flip-flop 611, which is freely pivotally mounted about a first axis A1, in practice a horizontal axis, on a frame.
  • the flip-flop 611 is equipped with support means able to clamp and rotate an ophthalmic lens 100.
  • These support means, or holding means comprise two shafts and rotation drive 612, 613. These two shafts 612, 613 are aligned with each other along a second axis A2, called locking pin, parallel to the first axis A1.
  • the two shafts 612, 613 are rotated synchronously by a motor (not shown), via a common drive mechanism (not shown) embedded on the flip-flop 611.
  • Each of the shafts 612, 613 has a free end facing each other and is adapted to receive an adapter 101, 102 for locking the lens on the shaft 612, 613.
  • the adapter 102 is bonded to the front face 108, convex, of the lens 100 to materialize the reference frame of the lens, before it is transferred to the shaping device 6.
  • the other adapter 101 is applied on the rear face 109, concave, of the lens 100 to maintain the lens clamped between the two adapters 101, 102 and allow it to rotate without slipping.
  • the shaft 613 is movable in translation along the blocking axis A2, facing the other shaft 612, to achieve the compression in axial compression of the lens between the two blocking adapters.
  • the shaft 613 is controlled for this axial translation by a drive motor via an actuating mechanism (not shown).
  • the other shaft 612 is fixed in translation along the blocking axis A2.
  • the trimming device 6 comprises a grinder 610 which comprises a train of several grinding wheels 614 mounted coaxially on the third axis A3, for roughing and finish of the edging of the ophthalmic lens 100 to be machined. These different grinding wheels are each adapted to the material of the cut-out lens and the type of operation performed (roughing, finishing, mineral or synthetic material, etc.).
  • the grinding wheel is attached to a common shaft of axis A3 ensuring their rotational drive during the edging operation. This common shaft, which is not visible in the figures shown, is rotated by an electric motor 620.
  • the wheel train 614 is also movable in translation along the axis A3 and is controlled in this translation by a drive motor.
  • a drive motor Concretely, the entire wheel train 614, its shaft and its motor is carried by a carriage 621 which is itself mounted on slides 622 secured to the frame for sliding along the third axis A3.
  • the translational movement of the wheel trolley 621 is called “transfer” and is noted TRA on the figure 1 .
  • This transfer is controlled by a motorized drive mechanism (not shown), such as a screw and nut or rack system.
  • the pivoting capacity of the lever 611 about the axis A1 is used.
  • This pivoting causes indeed a displacement, here substantially vertical, of the lens 100 sandwiched between the shafts 612, 613 which brings the lens closer to the grinding wheels 614.
  • This mobility which makes it possible to restore the desired shape of trimming (or trimming) and programmed in the electronic and computer system, is called restitution and is noted RES.
  • the trimming device 6 comprises an electronic and computer processing unit 199, for controlling the various members, here consisting of an electronic card designed to control in coordination the different mobilities of the working tools and the clamping and rotating drive means. of the lens in accordance with the automated trimming method to be discussed later.
  • the electronic and computer system 199 comprises, for example, conventionally a motherboard, a microprocessor, a random access memory and a permanent mass memory.
  • the mass memory contains a program for executing, on the one hand, the machining cycle of each lens according to the desired final contour, and, on the other hand, the verification method which will be described later.
  • This mass memory is preferably rewritable and is advantageously removable to allow its rapid replacement or programming on a remote computer via a standard standard interface.
  • a user interface for example a keyboard and a screen
  • another local or remote device such as a centering device, an outline reading device or a microcomputer executing software for assisting the trade of the optician or optometrist.
  • the restitution movement RES of the flip-flop 611 and the rotational movement ROT of the lens support shafts 613, 612 are controlled in coordination by the electronic and computer system 199 , duly programmed for this purpose, so that all the points of the contour of the ophthalmic lens 100 are successively brought back to the right radius.
  • each locking adapter 101, 102 cooperates with the free end 616, 615 of the corresponding shaft 613, 612, by a male part interlocking system. and complementary female performing, by form cooperation, a rotation drive without play.
  • each locking adapter 101, 102 comprises, on the one hand, a sleeve 113, 123 adapted to cooperate with the free end 616, 615 of the shaft 613, 612 with which it is associated and, on the other hand, a support washer 114, 124 having a front face 111, 121 applied to the lens 100 and a rear face 112, 122 opposite.
  • the bearing washer 114, 124 of each adapter has a diameter substantially greater than that of its sleeve 113, 123 and thus has an overflow portion or flange.
  • each adapter 101, 102 is elastically deformable to conform to the shape of the corresponding face of the lens 100 under the effect of an axial clamping force.
  • Such axial clamping force is applied together with the two adapters 101, 102, in opposition, by the trees 613, 612 at the time of their approximation for the final locking of the lens on said shafts.
  • the trimming device 6 also comprises probing means 900.
  • These probing means 900 comprise two probing branches 90 and 91 which are substantially rectilinear and which each end with a free angled end forming a probing nose 92, 93.
  • the two nozzles 92, 93 of the two branches 90, 91 point towards each other.
  • On each of the two nozzles 92 and 93 are mounted mechanical feelers known in themselves, operating by simple mechanical contact.
  • One and / or the other of the two branches 90 and 91 in this case the two branches 90 and 91 are movable in translation along an axis parallel to the axis A2 of the shafts 612, 613. This translation makes it possible to move the two spouts 92, 93 away from each other.
  • the translations of the branches 90, 91 are respectively controlled independently of one another by electric motors (not shown).
  • the two branches 90 and 91 are also movable transversely to the axis A2 of the shafts 612, 613 relative to said shafts 612, 613.
  • Cutting in full material consists of penetrating the entire diameter of the tool into the lens and moving the tool in the lens along a cutting path to obtain the desired cut.
  • the cutting in full matter is distinguished from the machining of the edge of the lens in the sense that, according to the latter, only a small part of the diameter of the machining tool is engaged in the material of the edge of the lens and the whole material, located between the periphery (or edge) raw lens and the outline of draft to be machined.
  • the cutting tool is here a milling cutter, or cutter, axis A6 substantially parallel to the axis A2 of the shafts 612, 613 (that is to say, the axis of the lens).
  • this cutting tool may be constituted by a drill or a grinding wheel, smaller in diameter than the grinding wheel or roughing cutter, or a laser beam.
  • the diameter of the cutter 637 is on average from 1 to 6% of the radius of the lens 100 (which is typically of the order of 70 mm).
  • the positioning of the cutting cutter is achieved by means of two pre-existing degrees of mobility which are the retraction on the one hand and the transfer TRA on the other hand. Once positioned, the cutter 637 is then moved transversely to the axis of the lens 100 to obtain the desired cutting contour.
  • the electronic and computer system 199 also comprises means for verifying the adequacy between, on the one hand, the lens 100 or the desired contour of this lens and, secondly, at least one of the adapters 101, 102 for blocking the lens 100.
  • the electronic and computer system 199 also comprises selection means for selecting, depending on the result of the adequacy check, either a tool for machining the edge of the lens 100 such as a wheel of the wheel set 614, or the cutting tool 637 of the lens 100, for at least one given clipping operation.
  • the lens 100 is previously centered (to locate its reference) and held between two blocking adapters 101, 102 and then placed on the shafts 612, 613 as described above.
  • the adequacy between the lens 100 and a single adapter is checked.
  • This embodiment is preferably applied in the case where the adapters are arranged in pairs and where a handling error envisaged relates to one pair of adapters with respect to another pair of adapters, and not each adapter taken individually.
  • This first embodiment also applies to the case where the lens is held and driven in rotation by only one adapter, on one of its faces, its other face being left free or receiving the support of a standard adapter small diameter not risking any machining conflict and little or no participation in frictional retention of the lens.
  • the acquisition of at least one geometrical characteristic 125 of the adapter 102 is then performed.
  • the acquisition is performed by the probing means 91, 93.
  • the acquired geometric characteristic of the locking adapter 102 is at least a part of the outer contour 125 of the rear face 122 of the washer 124 of the locking adapter 102, that is to say the connecting edge between the side and the back of the adapter.
  • the probing of the edge 125 of the adapter 102 is carried out by bringing the probing means 93 against the rear face 122 of the washer 124 of the locking adapter 102 and then moving the feeler means 93 in sliding relative to the to the blocking axis A2 of the lens until it escapes from the rear face 122 of the locking adapter 102. The escape position is then stored. This probing operation, possibly repeated on several radii, makes it possible to determine the edge 125 of desired junction.
  • the geometrical configuration of the blocking adapter 102 is then determined from the edge 125 of the junction of the blocking adapter 102. determines its radial extent with respect to the desired final contour 120 of the lens 100.
  • the position of the locking axis of the lens that is to say the position of the adapter, with respect to the desired contour, is taken into account.
  • the radial extent of the blocking adapter is then compared to a threshold of proximity of the desired final contour, for example 1 mm. This ensures that the adapter is positioned more than 1 mm from the desired final contour.
  • a threshold of proximity of the desired final contour makes it possible to ensure that the blocking adapter 102 is not machined.
  • the electronic processing system and computer 199 diagnostics an error (the result of the adequacy check is negative) and prompt to replace the adapter with another of smaller diameter.
  • the adequacy between the lens 100 and the blocking adapter 102 is also verified by verifying that the diameter of the blocking adapter 102 is adapted to the wettability angle of the corresponding face 108 of the lens to limit the sliding of the lens.
  • the lens By considering a drop of water present on the face of the lens concerned, the wettability angle is defined as the angle formed between, on the one hand, the plane tangent to the surface of the water droplet. a point of contact of this surface with the lens and, secondly, the plane tangent to the surface of the face of the lens at said point of contact with the surface of the drop of water. The larger this angle is, the lower the surface energy and therefore the more the lens will tend to slide during its machining.
  • This verification can be performed from curves or charts obtained empirically.
  • the electronic and computer processing system 199 invites the operator, via the display screen of the trimming device, to replace the locking adapter with another larger diameter locking adapter, and / or to modify the machining cycle of the lens of in order to reduce the force torque exerted on the lens, and / or to change the type of machining tool.
  • the modification of the machining cycle of the lens to reduce the force torque exerted on the lens consists, for example, in reducing the machining speed.
  • the computer and electronic processing system 199 invites to change the type of machining tool, he proposes to proceed with cutting into full material of the lens by means of the cutting tool 637, the operator to confirm the choice of the cutting tool 637 or cancel it. It can also be provided that the computer and electronic processing system 199 directly selects the cutting tool 637 without asking for confirmation.
  • the roughing of the lens is carried out according to a cutting contour whose shape corresponds to the desired final contour, but of slightly larger size.
  • the electronic processing system controls, in appropriate coordination, the transfer mobilities TRA and the retraction of the cutting tool 637, the restitution RES of the clamping shafts and the rotational drive 612, 613 and rotational shafts ROT of the lens to obtain the mobilities of the cutting tool with respect to the lens necessary for the realization of the cutting of the lens.
  • the finishing is then carried out by grinding on a finishing wheel of the wheel set 614.
  • the transfer mobilities TRA of the finishing wheel and the restitution mobilities RES and ROT of rotation of the lens are controlled so as to reach the desired final contour by removing the small amount of material between the blank contour obtained by cutting in full material and the desired final contour.
  • the grain of the finishing wheel being fine, the desired final contour is reached precisely.
  • the computer and electronic processing system 199 prompts to change the diameter of the adapter and once the new adapter is applied to the lens, the verification process is run again to make sure there has not been handling errors and that the new adapter is large enough to allow rotation of the lens and to prevent the lens from sliding relative to said adapter. Once the match between the adapter and the validated lens, the lens is trimmed according to the desired final contour.
  • said acquisition and said verification of the adequacy between the lens 100 and the locking adapter are performed for the two adapters 101, 102 blocking. This is done by simultaneously probing the two adapters 101, 102 in a similar manner to the probing method described above with reference to FIG. figure 2 .
  • the electronic processing unit controls the two probing branches 90, 91 to slide the probing tips 92, 93 against the rear faces 112, 122 of the washers 114, 124 of the adapters 101, 102 transversely to the blocking axis A2. from the lens to their escape at the edge 115, 125.
  • the exhaust position is then stored.
  • the operation possibly repeated on several shelves of the washers 114, 124, makes it possible to determine the position of the edge 115, 125 with respect to the lens. From this measurement, the electronic processing unit carries out, for the two adapters, the aforementioned adequacy checks.
  • the acquisition of the geometrical characteristic of the blocking adapter may not be performed by physical probing of the adapter or adapters, but may be performed remotely (without contact) by optical recognition of the geometric characteristics of the adapter or adapters.
  • the adapter may be a locking tassel having an adhesive layer applied to one side of the lens. At least a portion of a geometric characteristic of this glans is then acquired. It can also be provided that the adapter applied to one side of the lens comprises a first adapter and an acorn, the glans being directly applied to one side of the lens and fitted into the first adapter and that the adapter applied to the other side of the lens has only one adapter.

Description

DOMAINE TECHNIQUE AUQUEL SE RAPPORTE L'INVENTIONTECHNICAL FIELD TO WHICH THE INVENTION REFERS

La présente invention concerne de manière générale le montage de lentilles ophtalmiques d'une paire de lunettes correctrices sur une monture et vise plus particulièrement un dispositif et un procédé de détourage d'une lentille maintenue par un adaptateur de blocage.The present invention generally relates to the mounting of ophthalmic lenses of a pair of corrective glasses on a mount and is more particularly directed to a device and a method of trimming a lens held by a locking adapter.

ARRIÈRE-PLAN TECHNOLOGIQUETECHNOLOGICAL BACKGROUND

Le détourage d'une lentille, en vue de son montage dans ou sur la monture choisie par le futur porteur, consiste à modifier le contour de la lentille pour l'adapter à cette monture et/ou à la forme de lentille voulue.The trimming of a lens, for mounting in or on the frame chosen by the future carrier, is to modify the contour of the lens to adapt it to this frame and / or to the desired lens shape.

Habituellement, le détourage de la lentille est réalisé sur une meuleuse à commande numérique qui possède des moyens de maintien et d'entraînement en rotation de la lentille et plusieurs meules appropriées aux différentes opérations à réaliser. La lentille est d'abord bloquée sur les moyens de maintien et d'entraînement dans une configuration connue de telle sorte que son référentiel optique soit connu et que les opérations puissent ainsi être effectuées avec précision par référence à ce référentiel. On comprend en effet que ce blocage, accompagné de la mise en mémoire du référentiel optique, permet de définir et physiquement matérialiser sur la lentille un référentiel géométrique dans lequel on repère les points et directions caractéristiques de la lentille, nécessaires à la mise en cohérence de celui-ci avec la position de la pupille, ainsi que les valeurs de détourage afin que ces points et directions caractéristiques soient proprement positionnés dans la monture.Usually, the trimming of the lens is performed on a numerically controlled grinder which has means for holding and rotating the lens and several wheels suitable for the various operations to be performed. The lens is first locked on the holding and driving means in a known configuration so that its optical reference is known and operations can be performed accurately with reference to this reference. It is understood that this blocking, accompanied by the storage of the optical reference system, makes it possible to define and physically materialize on the lens a geometric reference system in which the points and directions characteristic of the lens, necessary for the coherence of this with the position of the pupil, as well as the clipping values so that these points and characteristic directions are properly positioned in the frame.

Les moyens de maintien et d'entraînement en rotation comportent généralement des moyens de support de la lentille et un adaptateur rapporté sur les moyens de support et appliqué sur la ou les faces de la lentille pour assurer son blocage sans glissement.The means for holding and rotating drive generally comprise means for supporting the lens and an adapter attached to the support means and applied to the face or faces of the lens to ensure its locking without slippage.

Il est prévu plusieurs tailles d'adaptateurs et l'adaptateur à utiliser est choisi en fonction des caractéristiques géométriques (taille et forme) du contour souhaité final de la lentille et de la position de l'adaptateur par rapport à ce contour, ainsi qu'en fonction des caractéristiques du cycle d'usinage (en particulier le couple exercé sur la lentille par l'outil d'usinage).There are several sizes of adapters and the adapter to be used is chosen according to the geometric characteristics (size and shape) of the final desired contour of the lens and the position of the adapter with respect to this contour, as well as depending on the characteristics of the machining cycle (in particular the torque exerted on the lens by the machining tool).

Cependant, en cas d'erreurs de manipulation, l'adaptateur mis en place sur la lentille peut ne pas correspondre à l'adaptateur souhaité pour réaliser le cycle d'usinage envisagé et obtenir le contour souhaité.However, in case of handling errors, the adapter placed on the lens may not correspond to the desired adapter to perform the intended machining cycle and obtain the desired contour.

En particulier, si la taille de l'adaptateur appliqué est supérieure à la taille du contour souhaité sur au moins une portion de ce contour souhaité, l'adaptateur sera usiné par l'outil d'usinage. Par contre, si la taille de l'adaptateur appliqué est plus petite que la taille de l'adaptateur prévu, l'adaptateur risque de ne pas pouvoir entraîner correctement en rotation la lentille et, du fait du couple exercé sur celle-ci par l'outil d'usinage, la lentille risque de glisser par rapport à l'adaptateur de blocage de la lentille.In particular, if the size of the adapter applied is greater than the size of the desired contour on at least a portion of this desired contour, the adapter will be machined by the machining tool. On the other hand, if the size of the adapter applied is smaller than the size of the adapter provided, the adapter may not be able to properly rotate the lens and, because of the torque exerted on it by the machining tool, the lens may slip relative to the lens lock adapter.

Il en résulte alors que le centrage de la lentille, en particulier l'axage (c'est-à-dire l'orientation angulaire de la lentille dans le référentiel de la meuleuse) est alors modifié et le contour obtenu de la lentille est différent, par rapport à son référentiel optique, du contour final souhaité après détourage.As a result, the centering of the lens, in particular the axis (that is to say, the angular orientation of the lens in the reference frame of the grinder) is then modified and the resulting contour of the lens is different. , relative to its optical reference, the desired final contour after clipping.

On connait par exemple du documentWe know, for example, of the document EP1201360EP1201360 un procédé selon le préambule de la revendication 1. Plus précisément, ce document enseigne que la position de l'adaptateur de blocage est ajustée en fonction de sa taille, afin d'éviter que l'adaptateur soit usiné par l'outil d'usinage.a method according to the preamble of claim 1. More specifically, this document teaches that the position of the locking adapter is adjusted according to its size, to prevent the adapter is machined by the machining tool .

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Le but de la présente invention est de permettre un détourage efficace, précis et fiable des lentilles.The object of the present invention is to allow an efficient, accurate and reliable clipping of the lenses.

À cet effet, on propose selon l'invention un procédé de détourage d'une lentille optique, tel que décrit dans la revendication 1. For this purpose, it is proposed according to the invention a method of trimming an optical lens, as described in claim 1.

L'invention a également pour objet un dispositif de détourage d'une lentille comportant des moyens de support de la lentille, des moyens d'usinage de la lentille, des moyens de déplacement transversal relatif de la lentille par rapport aux moyens d'usinage et des moyens de traitement électronique aptes à piloter les moyens de déplacement pour le détourage de la lentille selon un contour souhaité conformément à un cycle d'usinage programmé, les moyens de support comportant au moins un adaptateur de blocage de la lentille appliqué sur une face de ladite lentille, dans lequel il est prévu des moyens de palpage, avec ou sans contact de l'adaptateur et dans lequel les moyens de traitement électronique sont aptes à piloter ces moyens de palpage pour qu'ils réalisent une acquisition d'au moins une caractéristique géométrique de l'adaptateur de blocage.The subject of the invention is also a device for trimming a lens comprising means for supporting the lens, means for machining the lens, means for relative transverse displacement of the lens relative to the machining means and electronic processing means adapted to drive the displacement means for trimming the lens according to a desired contour according to a programmed machining cycle, the support means comprising at least one lens locking adapter applied to a face of said lens, in which probing means are provided, with or without contact of the adapter and wherein the electronic processing means are adapted to control these probing means so that they achieve an acquisition of at least one geometric characteristic of the locking adapter.

L'acquisition d'une caractéristique géométrique de l'adaptateur permet de déterminer la taille et la configuration géométrique de l'adaptateur par rapport à la lentille. Il est alors possible de vérifier que la configuration géométrique de l'adaptateur par rapport à la lentille autorise le détourage selon le contour souhaité sans usiner l'adaptateur. Il est également possible de vérifier si la configuration géométrique de l'adaptateur, compte tenu éventuellement d'une caractéristique de la lentille telle que la nature plus ou moins glissante de son revêtement de surface, est adapté à ce que l'adaptateur réalise l'entraînement en rotation de la lentille sans glissement. Cette vérification de l'adéquation entre la lentille et l'adaptateur permet de réaliser un détourage efficace, précis et fiable des lentilles.Acquiring a geometric feature of the adapter determines the size and geometric configuration of the adapter relative to the lens. It is then possible to verify that the geometric configuration of the adapter with respect to the lens allows the contouring to be desired according to the desired contour without machining the adapter. It is also possible to check whether the geometrical configuration of the adapter, possibly taking into account a characteristic of the lens such as the more or less sliding nature of its surface coating, is adapted so that the adapter realizes the rotational drive of the lens without slipping. This verification of the adequacy between the lens and the adapter makes it possible to achieve efficient, precise and reliable clipping of the lenses.

Selon une première caractéristique avantageuse de l'invention, ladite vérification de l'adéquation comporte la détermination de l'étendue radiale de l'adaptateur de blocage par rapport au contour final souhaité de la lentille.According to a first advantageous characteristic of the invention, said verification of suitability comprises determining the radial extent of the locking adapter relative to the desired final contour of the lens.

La détermination de l'étendue radiale permet de connaître le diamètre de l'adaptateur et de vérifier ainsi, compte-tenu de la position de l'adaptateur par rapport à le lentille que, d'une part, le diamètre de cet adaptateur ne déborde pas au delà du contour souhaité de la lentille et, d'autre part, que ce diamètre est suffisant pour assurer une friction entre l'adaptateur et la lentille adaptée à l'entraînement en rotation de la lentille sans glissement.The determination of the radial extent makes it possible to know the diameter of the adapter and thus to verify, taking into account the position of the adapter with respect to the lens, that, on the one hand, the diameter of this adapter does not overflow not beyond the desired contour of the lens and, secondly, that this diameter is sufficient to ensure friction between the adapter and the lens adapted to drive the rotation of the lens without sliding.

Selon une autre caractéristique avantageuse de l'invention, ladite vérification de l'adéquation comporte la réalisation du test selon lequel, si l'étendue radiale de l'adaptateur de blocage dépasse un seuil de proximité du contour final souhaité de la lentille sur au moins une partie de ce contour souhaité, on remplace l'adaptateur par un autre de plus faible étendue radiale.According to another advantageous characteristic of the invention, said verification of suitability comprises carrying out the test according to which, if the radial extent of the locking adapter exceeds a threshold of proximity of the desired final contour of the lens to at least part of this desired contour, the adapter is replaced by another of smaller radial extent.

La prise en compte d'un seuil de proximité du contour final souhaité permet de s'assurer qu'après la réalisation d'une ébauche de détourage on puisse encore usiner le chant de la lentille pour réaliser une finition de détourage telle qu'un biseautage par exemple, sans usiner l'adaptateur.The taking into account of a threshold of proximity of the desired final contour makes it possible to ensure that, after the completion of a roughing blank, it is still possible to machine the edge of the lens in order to achieve a trimming finish such as beveling. for example, without machining the adapter.

Selon une autre caractéristique avantageuse de l'invention, il est prévu l'étape conditionnelle suivant laquelle, si ladite vérification d'adéquation aboutit à un résultat négatif, on exécute l'une au moins des opérations suivantes : remplacement de l'adaptateur de blocage par un autre adaptateur de blocage, modification d'au moins une caractéristique du cycle d'usinage de la lentille, détourage de la lentille, au moins en partie, par découpage en pleine matière de ladite lentille.According to another advantageous characteristic of the invention, there is provided the conditional step according to which, if said adequacy check results in a negative result, at least one of the following operations is performed: replacement of the blocking adapter by another blocking adapter, modifying at least one characteristic of the machining cycle of the lens, cutting the lens, at least in part, by cutting in the said lens.

Selon une autre caractéristique avantageuse de l'invention, il est prévu l'étape conditionnelle suivant laquelle, si ladite vérification d'adéquation aboutit à un résultat positif, on procède à l'usinage de la lentille par meulage du chant de la lentille, sans remplacer l'adaptateur ni modifier le cycle d'usinage programmé.According to another advantageous characteristic of the invention, there is provided the conditional step according to which, if said adequacy check results in a positive result, the lens is machined by grinding the edge of the lens, without replace the adapter or change the programmed machining cycle.

Selon une autre caractéristique avantageuse de l'invention, ladite vérification d'adéquation comporte la vérification de l'adéquation de ladite caractéristique géométrique acquise de l'adaptateur de blocage avec l'angle de mouillabilité de la face correspondante de la lentille.According to another advantageous characteristic of the invention, said adequacy check comprises verifying the adequacy of said acquired geometric characteristic of the locking adapter with the wettability angle of the corresponding face of the lens.

Selon une autre caractéristique avantageuse de l'invention, il est prévu l'étape conditionnelle suivant laquelle si ladite caractéristique géométrique acquise de l'adaptateur de blocage n'est pas en adéquation avec l'angle de mouillabilité de la lentille, on remplace l'adaptateur de blocage par un autre adaptateur de blocage d'étendue radiale plus importante et/ou on modifie au moins une caractéristique du cycle d'usinage de la lentille et/ou on procède au détourage de la lentille, au moins en partie, par découpage en pleine matière de ladite lentille.According to another advantageous characteristic of the invention, there is provided the conditional step according to which if said acquired geometric characteristic of the blocking adapter is not in adequacy with the angle of wettability of the lens, it replaces the blocking adapter by another larger radial expansion blocking adapter and / or modifying at least one characteristic of the machining cycle of the lens and / or the lens is trimmed at least in part by cutting in full matter of said lens.

Dans le cas où l'angle de mouillabilité est trop important par rapport au diamètre de l'adaptateur pour empêcher le glissement, on peut augmenter le diamètre de l'adaptateur pour augmenter la surface de friction entre l'adaptateur et la lentille. On peut également jouer sur les caractéristiques du cycle d'usinage telles que la vitesse d'usinage pour limiter le glissement de la lentille. Enfin, on peut utiliser un outil de découpage qui, par rapport à un outil d'usinage classique du chant de la lentille, génère un couple sur la lentille beaucoup moins important.
En effet, l'outil de découpage est de bien plus faible diamètre qu'un outil d'usinage tel qu'une meule et l'outil de découpage usine l'intérieur de la lentille ce qui permet de s'approcher rapidement du contour souhaité avec un minimum d'énergie dissipée entre l'outil de découpage et la lentille.In the case where the wettability angle is too large relative to the diameter of the adapter to prevent slippage, the diameter of the adapter can be increased to increase the friction surface between the adapter and the lens. One can also play on the characteristics of the machining cycle such as the machining speed to limit the sliding of the lens. Finally, it is possible to use a cutting tool which, compared with a conventional tool for machining the edge of the lens, generates a much smaller torque on the lens.
Indeed, the cutting tool is much smaller diameter than a machining tool such as a grinding wheel and the cutting tool is machining inside the lens which allows to quickly approach the desired contour with a minimum of energy dissipated between the cutting tool and the lens.

Selon une autre caractéristique avantageuse de l'invention, il est prévu l'étape conditionnelle suivant laquelle si ladite caractéristique géométrique acquise de l'adaptateur de blocage est en adéquation avec l'angle de mouillabilité de la lentille, on procède à l'usinage de la lentille par meulage du chant de la lentille, sans remplacer l'adaptateur ni modifier le cycle d'usinage programmé.According to another advantageous characteristic of the invention, there is provided the conditional step according to which if said acquired geometric characteristic of the locking adapter is in adequacy with the angle of wettability of the lens, machining of the lens by grinding the edge of the lens without replacing the adapter or changing the programmed machining cycle.

Dans le cas où l'angle de mouillabilité est suffisamment faible par rapport au diamètre de l'adaptateur pour empêcher le glissement de la lentille, on peut procéder directement à l'usinage de la lentille par meulage avec un risque de glissement limité de la lentille.In the case where the wettability angle is sufficiently small relative to the diameter of the adapter to prevent slippage of the lens, it is possible to proceed directly to the machining of the lens by grinding with a risk of limited sliding of the lens. .

DESCRIPTION DÉTAILLÉE D'UN EXEMPLE DE RÉALISATIONDETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT

La description qui va suivre en regard des dessins annexés de plusieurs modes de réalisation, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.The following description with reference to the accompanying drawings of several embodiments, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be achieved.

Sur les dessins annexés :

  • la figure 1 est une vue en perspective d'un dispositif de détourage d'une lentille optique pourvu de moyens de palpage ;
  • la figure 2 est une vue de côté de la lentille optique serrée entre deux adaptateurs et des moyens de palpage pilotés selon un premier mode de réalisation ;
  • la figure 3 est une vue de côté de la lentille optique serrée entre deux adaptateurs et des moyens de palpage pilotés selon un deuxième mode de réalisation.
In the accompanying drawings:
  • the figure 1 is a perspective view of a device for trimming an optical lens provided with probing means;
  • the figure 2 is a side view of the optical lens clamped between two adapters and controlled probing means according to a first embodiment;
  • the figure 3 is a side view of the optical lens clamped between two adapters and controlled probing means according to a second embodiment.

A la figure 1 on a représenté un dispositif de détourage 6 numérique adapté à modifier le contour de la lentille ophtalmique pour l'adapter à celui du cadre ou "cercle" d'une monture sélectionnée.To the figure 1 there is shown a digital trimming device 6 adapted to change the contour of the ophthalmic lens to fit that of the frame or "circle" of a selected frame.

Ce dispositif comporte une bascule 611, qui est montée librement pivotante autour d'un premier axe A1, en pratique un axe horizontal, sur un châssis. Pour l'immobilisation et l'entraînement en rotation d'une lentille ophtalmique à usiner, la bascule 611 est équipée de moyens de support aptes à serrer et à entraîner en rotation une lentille ophtalmique 100. Ces moyens de support, ou moyens de maintien, comprennent deux arbres de serrage et d'entraînement en rotation 612, 613. Ces deux arbres 612, 613 sont alignés l'un avec l'autre suivant un deuxième axe A2, appelé axe de blocage, parallèle au premier axe A1. Les deux arbres 612, 613 sont entraînés en rotation de façon synchrone par un moteur (non représenté), via un mécanisme d'entraînement commun (non représenté) embarqué sur la bascule 611.This device comprises a flip-flop 611, which is freely pivotally mounted about a first axis A1, in practice a horizontal axis, on a frame. For the immobilization and rotation of an ophthalmic lens to be machined, the flip-flop 611 is equipped with support means able to clamp and rotate an ophthalmic lens 100. These support means, or holding means, comprise two shafts and rotation drive 612, 613. These two shafts 612, 613 are aligned with each other along a second axis A2, called locking pin, parallel to the first axis A1. The two shafts 612, 613 are rotated synchronously by a motor (not shown), via a common drive mechanism (not shown) embedded on the flip-flop 611.

Chacun des arbres 612, 613 possède une extrémité libre qui fait face à l'autre et qui est conçue pour recevoir un adaptateur 101, 102 de blocage de la lentille sur l'arbre 612, 613. En l'espèce, l'adaptateur 102 est collé sur la face avant 108, convexe, de la lentille 100 pour matérialiser le référentiel de la lentille, avant qu'elle ne soit transférée au dispositif de détourage 6. L'autre adaptateur 101 est appliqué sur la face arrière 109, concave, de la lentille 100 pour maintenir la lentille serrée entre les deux adaptateurs 101, 102 et permettre son entraînement en rotation sans glissement.Each of the shafts 612, 613 has a free end facing each other and is adapted to receive an adapter 101, 102 for locking the lens on the shaft 612, 613. In this case, the adapter 102 is bonded to the front face 108, convex, of the lens 100 to materialize the reference frame of the lens, before it is transferred to the shaping device 6. The other adapter 101 is applied on the rear face 109, concave, of the lens 100 to maintain the lens clamped between the two adapters 101, 102 and allow it to rotate without slipping.

L'arbre 613 est mobile en translation suivant l'axe de blocage A2, en regard de l'autre arbre 612, pour réaliser le serrage en compression axiale de la lentille entre les deux adaptateurs de blocage. L'arbre 613 est commandé pour cette translation axiale par un moteur d'entraînement via un mécanisme d'actionnement (non représentés). L'autre arbre 612 est fixe en translation suivant l'axe de blocage A2.The shaft 613 is movable in translation along the blocking axis A2, facing the other shaft 612, to achieve the compression in axial compression of the lens between the two blocking adapters. The shaft 613 is controlled for this axial translation by a drive motor via an actuating mechanism (not shown). The other shaft 612 is fixed in translation along the blocking axis A2.

Le dispositif de détourage 6 comprend une meuleuse 610 qui comporte un train de plusieurs meules 614 montées coaxialement sur le troisième axe A3, pour un ébauchage et une finition du débordage de la lentille ophtalmique 100 à usiner. Ces différentes meules sont adaptées chacune au matériau de la lentille détourée et au type d'opération effectuée (ébauche, finition, matériau minéral ou synthétique, etc. ). Le train de meule est rapporté sur un arbre commun d'axe A3 assurant leur entraînement en rotation lors de l'opération de débordage. Cet arbre commun, qui n'est pas visible sur les figures présentées, est commandé en rotation par un moteur électrique 620.The trimming device 6 comprises a grinder 610 which comprises a train of several grinding wheels 614 mounted coaxially on the third axis A3, for roughing and finish of the edging of the ophthalmic lens 100 to be machined. These different grinding wheels are each adapted to the material of the cut-out lens and the type of operation performed (roughing, finishing, mineral or synthetic material, etc.). The grinding wheel is attached to a common shaft of axis A3 ensuring their rotational drive during the edging operation. This common shaft, which is not visible in the figures shown, is rotated by an electric motor 620.

Le train de meules 614 est en outre mobile en translation suivant l'axe A3 et est commandé dans cette translation par une motorisation pilotée. Concrètement, l'ensemble du train de meules 614, de son arbre et de son moteur est porté par un chariot 621 qui est lui-même monté sur des glissières 622 solidaires du bâti pour coulisser suivant le troisième axe A3. Le mouvement de translation du chariot porte-meules 621 est appelé « transfert » et est noté TRA sur la figure 1. Ce transfert est commandé par un mécanisme d'entraînement motorisé (non représenté), tel qu'un système à vis et écrou ou crémaillère.The wheel train 614 is also movable in translation along the axis A3 and is controlled in this translation by a drive motor. Concretely, the entire wheel train 614, its shaft and its motor is carried by a carriage 621 which is itself mounted on slides 622 secured to the frame for sliding along the third axis A3. The translational movement of the wheel trolley 621 is called "transfer" and is noted TRA on the figure 1 . This transfer is controlled by a motorized drive mechanism (not shown), such as a screw and nut or rack system.

Pour permettre un réglage dynamique de l'entraxe entre l'axe A3 des meules 614 et l'axe A2 de la lentille lors du débordage, on utilise la capacité de pivotement de la bascule 611 autour de l'axe A1. Ce pivotement provoque en effet un déplacement, ici sensiblement vertical, de la lentille 100 enserrée entre les arbres 612, 613 qui rapproche ou éloigne la lentille des meules 614. Cette mobilité, qui permet de restituer la forme de débordage (ou détourage) voulue et programmée dans le système électronique et informatique, est appelée restitution et est notée RES.To allow a dynamic adjustment of the distance between the axis A3 of the grinding wheels 614 and the axis A2 of the lens during the edging, the pivoting capacity of the lever 611 about the axis A1 is used. This pivoting causes indeed a displacement, here substantially vertical, of the lens 100 sandwiched between the shafts 612, 613 which brings the lens closer to the grinding wheels 614. This mobility, which makes it possible to restore the desired shape of trimming (or trimming) and programmed in the electronic and computer system, is called restitution and is noted RES.

Le dispositif de détourage 6 comprend une unité de traitement électronique et informatique 199, de pilotage des différents organes, consistant ici en une carte électronique conçue pour piloter en coordination les différentes mobilités des outils de travail et des moyens de serrage et d'entraînement en rotation de la lentille conformément au procédé de détourage automatisé qui sera exposé ultérieurement.The trimming device 6 comprises an electronic and computer processing unit 199, for controlling the various members, here consisting of an electronic card designed to control in coordination the different mobilities of the working tools and the clamping and rotating drive means. of the lens in accordance with the automated trimming method to be discussed later.

Le système électronique et informatique 199 comprend par exemple de façon classique une carte mère, un microprocesseur, une mémoire vive et une mémoire de masse permanente. La mémoire de masse contient un programme d'exécution, d'une part, du cycle d'usinage de chaque lentille selon le contour final souhaité, et, d'autre part, du procédé de vérification qui sera décrit plus loin. Cette mémoire de masse est de préférence réinscriptible et est avantageusement amovible pour permettre son remplacement rapide ou sa programmation sur un ordinateur distant via une interface de norme standard. Il est également prévu des moyens de mémorisation du contour final souhaité 120 de la lentille, une interface utilisateur (par exemple un clavier et un écran), des moyens de communication avec un autre dispositif local ou distant, tel qu'un appareil de centrage, un appareil de lecture de contour ou un micro-ordinateur exécutant un logiciel d'assistance au métier de l'opticien ou optométriste.The electronic and computer system 199 comprises, for example, conventionally a motherboard, a microprocessor, a random access memory and a permanent mass memory. The mass memory contains a program for executing, on the one hand, the machining cycle of each lens according to the desired final contour, and, on the other hand, the verification method which will be described later. This mass memory is preferably rewritable and is advantageously removable to allow its rapid replacement or programming on a remote computer via a standard standard interface. There are also means for memorizing the desired final contour 120 of the lens, a user interface (for example a keyboard and a screen), means of communication with another local or remote device, such as a centering device, an outline reading device or a microcomputer executing software for assisting the trade of the optician or optometrist.

Pour l'usinage de la lentille ophtalmique 100 suivant un contour donné, le mouvement de restitution RES de la bascule 611 et le mouvement de rotation ROT des arbres 613, 612 de support de la lentille sont pilotés en coordination par le système électronique et informatique 199, dûment programmé à cet effet, pour que tous les points du contour de la lentille ophtalmique 100 soient successivement ramenés au bon rayon.For the machining of the ophthalmic lens 100 following a given contour, the restitution movement RES of the flip-flop 611 and the rotational movement ROT of the lens support shafts 613, 612 are controlled in coordination by the electronic and computer system 199 , duly programmed for this purpose, so that all the points of the contour of the ophthalmic lens 100 are successively brought back to the right radius.

Pour son interfaçage mécanique avec les arbres 613, 612 des moyens de détourage 6, chaque adaptateur de blocage 101, 102 coopère avec l'extrémité libre 616, 615 de l'arbre 613, 612 correspondant, par un système d'emboîtement à parties mâle et femelle complémentaires réalisant, par coopération de forme, un entraînement en rotation sans jeu.For its mechanical interfacing with the shafts 613, 612 of the trimming means 6, each locking adapter 101, 102 cooperates with the free end 616, 615 of the corresponding shaft 613, 612, by a male part interlocking system. and complementary female performing, by form cooperation, a rotation drive without play.

Comme représenté sur les figures 2 et 3, chaque adaptateur de blocage 101, 102 comporte, d'une part, un manchon 113, 123 adapté à coopérer avec l'extrémité libre 616, 615 de l'arbre 613, 612 auquel il est associé et, d'autre part, une rondelle d'appui 114, 124 présentant une face avant 111, 121 appliquée sur la lentille 100 et une face arrière 112, 122 opposée. La rondelle d'appui 114, 124 de chaque adaptateur présente un diamètre sensiblement supérieur à celui de son manchon 113, 123 et présente ainsi une partie en débordement ou collerette. La rondelle 114, 124 de chaque adaptateur 101, 102 est élastiquement déformable pour épouser la forme de la face correspondante de la lentille 100 sous l'effet d'un effort de serrage axial. Un tel effort de serrage axial est appliqué conjointement aux deux adaptateurs 101, 102, en opposition, par les arbres 613, 612 au moment de leur rapprochement pour le blocage final de la lentille sur lesdits arbres.As shown on Figures 2 and 3 each locking adapter 101, 102 comprises, on the one hand, a sleeve 113, 123 adapted to cooperate with the free end 616, 615 of the shaft 613, 612 with which it is associated and, on the other hand, a support washer 114, 124 having a front face 111, 121 applied to the lens 100 and a rear face 112, 122 opposite. The bearing washer 114, 124 of each adapter has a diameter substantially greater than that of its sleeve 113, 123 and thus has an overflow portion or flange. The washer 114, 124 of each adapter 101, 102 is elastically deformable to conform to the shape of the corresponding face of the lens 100 under the effect of an axial clamping force. Such axial clamping force is applied together with the two adapters 101, 102, in opposition, by the trees 613, 612 at the time of their approximation for the final locking of the lens on said shafts.

Le dispositif de détourage 6 comprend par ailleurs des moyens de palpage 900. Ces moyens de palpage 900 comprennent deux branches de palpage 90 et 91 qui sont sensiblement rectilignes et qui se terminent chacune par une extrémité libre coudée formant un bec de palpage 92, 93. Les deux becs 92, 93 des deux branches 90, 91 pointent l'un vers l'autre. Sur chacun des deux becs 92 et 93 sont montés des palpeurs mécaniques connus en eux-mêmes, opérant par simple contact mécanique.The trimming device 6 also comprises probing means 900. These probing means 900 comprise two probing branches 90 and 91 which are substantially rectilinear and which each end with a free angled end forming a probing nose 92, 93. The two nozzles 92, 93 of the two branches 90, 91 point towards each other. On each of the two nozzles 92 and 93 are mounted mechanical feelers known in themselves, operating by simple mechanical contact.

L'une et/ou l'autre des deux branches 90 et 91, en l'espèce les deux branches 90 et 91 sont mobiles en translation selon un axe parallèle à l'axe A2 des arbres 612, 613. Cette translation permet d'écarter ou de rapprocher les deux becs 92, 93. Les translations des branches 90, 91 sont respectivement commandées indépendamment l'une de l'autre par des moteurs électriques (non représentés). Les deux branches 90 et 91 sont également mobiles transversalement à l'axe A2 des arbres 612, 613 par rapport auxdits arbres 612, 613.One and / or the other of the two branches 90 and 91, in this case the two branches 90 and 91 are movable in translation along an axis parallel to the axis A2 of the shafts 612, 613. This translation makes it possible to move the two spouts 92, 93 away from each other. The translations of the branches 90, 91 are respectively controlled independently of one another by electric motors (not shown). The two branches 90 and 91 are also movable transversely to the axis A2 of the shafts 612, 613 relative to said shafts 612, 613.

Il est également prévu un outil de découpage 637 destiné à réaliser une ébauche du détourage par découpage en pleine matière de la lentille 100 (voir figure 1). Le découpage en pleine matière consiste à faire pénétrer tout le diamètre de l'outil dans la lentille et à déplacer l'outil dans la lentille suivant une trajectoire de découpage permettant d'obtenir la découpe souhaitée. Le découpage en pleine matière se distingue de l'usinage du chant de la lentille au sens où, selon ce dernier, une petite partie seulement du diamètre de l'outil d'usinage est engagée dans la matière du chant de la lentille et toute la matière, située entre la périphérie (ou chant) brute de la lentille et le contour d'ébauche à réaliser est usinée.There is also provided a cutting tool 637 for making a blank of the clipping by cutting the lens 100 in full material (see FIG. figure 1 ). Cutting in full material consists of penetrating the entire diameter of the tool into the lens and moving the tool in the lens along a cutting path to obtain the desired cut. The cutting in full matter is distinguished from the machining of the edge of the lens in the sense that, according to the latter, only a small part of the diameter of the machining tool is engaged in the material of the edge of the lens and the whole material, located between the periphery (or edge) raw lens and the outline of draft to be machined.

L'outil de découpage est ici une fraise à queue, ou fraise de découpage, d'axe A6 sensiblement parallèle à l'axe A2 des arbres 612, 613 (c'est-à-dire à l'axe de la lentille). En variante, cet outil de découpage peut être constitué par un foret ou une meule, de plus petit diamètre que la meule ou fraise d'ébauche, ou encore un rayon laser.The cutting tool is here a milling cutter, or cutter, axis A6 substantially parallel to the axis A2 of the shafts 612, 613 (that is to say, the axis of the lens). Alternatively, this cutting tool may be constituted by a drill or a grinding wheel, smaller in diameter than the grinding wheel or roughing cutter, or a laser beam.

On peut aussi considérer que le diamètre de la fraise de découpage 637 est en moyenne de 1 à 6 % du rayon de la lentille 100 (qui est typiquement de l'ordre de 70 mm).It can also be considered that the diameter of the cutter 637 is on average from 1 to 6% of the radius of the lens 100 (which is typically of the order of 70 mm).

Le positionnement de la fraise de découpage est réalisé au moyen de deux degrés de mobilité préexistants qui sont l'escamotage d'une part et le transfert TRA d'autre part. Une fois positionnée, la fraise de découpage 637 est alors déplacée transversalement par rapport à l'axe de la lentille 100 pour obtenir le contour de coupe souhaité.The positioning of the cutting cutter is achieved by means of two pre-existing degrees of mobility which are the retraction on the one hand and the transfer TRA on the other hand. Once positioned, the cutter 637 is then moved transversely to the axis of the lens 100 to obtain the desired cutting contour.

Le système électronique et informatique 199 comporte également des moyens de vérification de l'adéquation entre d'une part, la lentille 100 ou le contour souhaité de cette lentille et, d'autre part, au moins un des adaptateurs 101, 102 de blocage de la lentille 100.The electronic and computer system 199 also comprises means for verifying the adequacy between, on the one hand, the lens 100 or the desired contour of this lens and, secondly, at least one of the adapters 101, 102 for blocking the lens 100.

Le système électronique et informatique 199 comporte aussi des moyens de sélection pour sélectionner, en fonction du résultat de la vérification d'adéquation, soit un outil d'usinage du chant de la lentille 100 tel qu'une meule du train de meule 614, soit l'outil de découpage 637 de la lentille 100, pour au moins une opération de détourage donnée.The electronic and computer system 199 also comprises selection means for selecting, depending on the result of the adequacy check, either a tool for machining the edge of the lens 100 such as a wheel of the wheel set 614, or the cutting tool 637 of the lens 100, for at least one given clipping operation.

L'opération de vérification d'adéquation est décrite ci-dessous.The fit check operation is described below.

La lentille 100 est préalablement centrée (pour repérer son référentiel) et maintenue entre deux adaptateurs de blocage 101, 102 puis placée sur les arbres 612, 613 comme décrit ci-dessus.The lens 100 is previously centered (to locate its reference) and held between two blocking adapters 101, 102 and then placed on the shafts 612, 613 as described above.

Selon un premier mode de réalisation représenté sur la figure 2, on vérifie l'adéquation entre la lentille 100 et un seul adaptateur. Ce mode de réalisation s'applique préférentiellement au cas où les adaptateurs sont rangés par paires et où une erreur de manipulation envisagée concerne une paire d'adaptateurs par rapport à une autre paire d'adaptateurs, et non pas chaque adaptateur pris individuellement. Ce premier mode de réalisation s'applique également au cas où la lentille n'est maintenue et entraînée en rotation que par un seul adaptateur, sur une de ses faces, son autre face étant laissée libre ou recevant l'appui d'un adaptateur standard de petit diamètre ne risquant aucun conflit d'usinage et participant peu ou pas au maintien par friction de la lentille.According to a first embodiment shown on the figure 2 , the adequacy between the lens 100 and a single adapter is checked. This embodiment is preferably applied in the case where the adapters are arranged in pairs and where a handling error envisaged relates to one pair of adapters with respect to another pair of adapters, and not each adapter taken individually. This first embodiment also applies to the case where the lens is held and driven in rotation by only one adapter, on one of its faces, its other face being left free or receiving the support of a standard adapter small diameter not risking any machining conflict and little or no participation in frictional retention of the lens.

On réalise alors l'acquisition d'au moins une caractéristique géométrique 125 de l'adaptateur 102. Ici l'acquisition est réalisée par les moyens de palpage 91,93.The acquisition of at least one geometrical characteristic 125 of the adapter 102 is then performed. Here, the acquisition is performed by the probing means 91, 93.

La caractéristique géométrique acquise de l'adaptateur 102 de blocage est au moins une partie du contour extérieur 125 de la face arrière 122 de la rondelle 124 de l'adaptateur 102 de blocage, c'est-à-dire l'arête de jonction entre la face latérale et la face arrière de l'adaptateur.The acquired geometric characteristic of the locking adapter 102 is at least a part of the outer contour 125 of the rear face 122 of the washer 124 of the locking adapter 102, that is to say the connecting edge between the side and the back of the adapter.

Le palpage de l'arête 125 de l'adaptateur 102 est réalisé en amenant les moyens de palpage 93 contre la face arrière 122 de la rondelle 124 de l'adaptateur 102 de blocage puis en déplaçant radialement les moyens de palpage 93 en glissement par rapport à l'axe de blocage A2 de la lentille jusqu'à échapper de la face arrière 122 de l'adaptateur 102 de blocage. La position d'échappement est alors mémorisée. Cette opération de palpage, éventuellement répétée sur plusieurs rayons, permet de déterminer l'arête 125 de jonction recherchée.The probing of the edge 125 of the adapter 102 is carried out by bringing the probing means 93 against the rear face 122 of the washer 124 of the locking adapter 102 and then moving the feeler means 93 in sliding relative to the to the blocking axis A2 of the lens until it escapes from the rear face 122 of the locking adapter 102. The escape position is then stored. This probing operation, possibly repeated on several radii, makes it possible to determine the edge 125 of desired junction.

On détermine alors la configuration géométrique de l'adaptateur 102 de blocage à partir de l'arête 125 de jonction de l'adaptateur 102 de blocage puis on détermine son étendue radiale par rapport au contour final 120 souhaité de la lentille 100. Bien entendu la position de l'axe de blocage de la lentille, c'est-à-dire la position de l'adaptateur, par rapport au contour souhaité, est prise en compte.The geometrical configuration of the blocking adapter 102 is then determined from the edge 125 of the junction of the blocking adapter 102. determines its radial extent with respect to the desired final contour 120 of the lens 100. Of course, the position of the locking axis of the lens, that is to say the position of the adapter, with respect to the desired contour, is taken into account.

On compare alors l'étendue radiale de l'adaptateur de blocage à un seuil de proximité du contour final souhaité, par exemple 1 mm. On vérifie ainsi que l'adaptateur est positionné à plus de 1 mm du contour final souhaité.The radial extent of the blocking adapter is then compared to a threshold of proximity of the desired final contour, for example 1 mm. This ensures that the adapter is positioned more than 1 mm from the desired final contour.

La prise en compte d'un seuil de proximité du contour final souhaité permet de s'assurer que l'on ne va pas usiner l'adaptateur de blocage 102. Dans le cas où l'adaptateur 102 de blocage s'étend transversalement à l'axe A2 au-delà du seuil de proximité du contour souhaité 120 de la lentille, sur au moins une partie de ce contour souhaité 120, le système de traitement électronique et informatique 199 diagnostique une erreur (le résultat de la vérification d'adéquation est négatif) et invite à remplacer l'adaptateur par un autre de diamètre plus petit.Taking into account a threshold of proximity of the desired final contour makes it possible to ensure that the blocking adapter 102 is not machined. In the case where the adapter 102 for locking extends transversely to the A2 axis beyond the threshold of proximity of the desired contour 120 of the lens, on at least a portion of this desired contour 120, the electronic processing system and computer 199 diagnostics an error (the result of the adequacy check is negative) and prompt to replace the adapter with another of smaller diameter.

On vérifie également l'adéquation entre la lentille 100 et l'adaptateur de blocage 102 en vérifiant que le diamètre de l'adaptateur 102 de blocage est adapté à l'angle de mouillabilité de la face correspondante 108 de la lentille pour limiter le glissement de la lentille. En considérant, une goutte d'eau présente sur la face de la lentille concernée, l'angle de mouillabilité est défini comme étant l'angle formé entre, d'une part, le plan tangent à la surface de la goutte d'eau en un point de contact de cette surface avec la lentille et, d'autre part, le plan tangent à la surface de la face de la lentille audit point de contact avec la surface de la goutte d'eau. Plus cet angle est important plus l'énergie de surface est faible et donc plus la lentille aura tendance à glisser lors de son usinage. Cette vérification peut être réalisée à partir de courbes ou d'abaques obtenues empiriquement.The adequacy between the lens 100 and the blocking adapter 102 is also verified by verifying that the diameter of the blocking adapter 102 is adapted to the wettability angle of the corresponding face 108 of the lens to limit the sliding of the lens. The lens. By considering a drop of water present on the face of the lens concerned, the wettability angle is defined as the angle formed between, on the one hand, the plane tangent to the surface of the water droplet. a point of contact of this surface with the lens and, secondly, the plane tangent to the surface of the face of the lens at said point of contact with the surface of the drop of water. The larger this angle is, the lower the surface energy and therefore the more the lens will tend to slide during its machining. This verification can be performed from curves or charts obtained empirically.

Dans le cas où le diamètre de l'adaptateur de blocage prévu est trop faible par rapport à l'angle de mouillabilité pour empêcher le glissement de la lentille, le résultat de la vérification d'adéquation est négatif et le système de traitement électronique et informatique 199 invite l'opérateur, via l'écran d'affichage du dispositif de détourage, à remplacer l'adaptateur de blocage par un autre adaptateur de blocage de diamètre plus grand, et/ou à modifier le cycle d'usinage de la lentille de manière à réduire le couple d'effort exercé sur la lentille, et/ou à changer de type d'outil d'usinage.In the case where the diameter of the planned blocking adapter is too small relative to the wettability angle to prevent slippage of the lens, the result of the fit check is negative and the electronic and computer processing system 199 invites the operator, via the display screen of the trimming device, to replace the locking adapter with another larger diameter locking adapter, and / or to modify the machining cycle of the lens of in order to reduce the force torque exerted on the lens, and / or to change the type of machining tool.

La modification du cycle d'usinage de la lentille pour réduire le couple d'effort exercé sur la lentille consiste, par exemple, à diminuer la vitesse d'usinage.The modification of the machining cycle of the lens to reduce the force torque exerted on the lens consists, for example, in reducing the machining speed.

Lorsque le système de traitement électronique et informatique 199 invite à changer de type d'outil d'usinage, il propose de procéder au découpage en pleine matière de la lentille au moyen de l'outil de découpage 637, l'opérateur devant confirmer le choix de l'outil de découpage 637 ou l'annuler. On peut également prévoir que le système de traitement électronique et informatique 199 sélectionne directement l'outil de découpage 637 sans demander confirmation.When the computer and electronic processing system 199 invites to change the type of machining tool, he proposes to proceed with cutting into full material of the lens by means of the cutting tool 637, the operator to confirm the choice of the cutting tool 637 or cancel it. It can also be provided that the computer and electronic processing system 199 directly selects the cutting tool 637 without asking for confirmation.

Une fois l'outil de découpage sélectionné, on réalise l'ébauche du détourage de la lentille suivant un contour de découpe dont la forme correspond au contour final souhaité, mais de taille légèrement plus grande. Lors du découpage, le système de traitement électronique pilote en coordination appropriée les mobilités de transfert TRA et d'escamotage de l'outil de découpage 637, de restitution RES des arbres de serrage et d'entraînement en rotation 612, 613 et de rotation ROT de la lentille pour obtenir les mobilités de l'outil de découpage par rapport à la lentille nécessaires à la réalisation du découpage de la lentille. On procède ensuite à la finition du détourage par meulage sur une meule de finition du train de meules 614. Les mobilités de transfert TRA de la meule de finition et les mobilités de restitution RES et de rotation ROT de la lentille sont pilotées de manière à atteindre le contour final souhaité en enlevant la faible quantité de matière située entre le contour d'ébauche obtenu par découpage en pleine matière et le contour final souhaité. Le grain de la meule de finition étant fin, le contour final souhaité est atteint avec précision. En variante on peut également prévoir de découper directement la lentille suivant le contour final souhaité si l'outil de découpage est suffisamment précis.Once the cutting tool has been selected, the roughing of the lens is carried out according to a cutting contour whose shape corresponds to the desired final contour, but of slightly larger size. During cutting, the electronic processing system controls, in appropriate coordination, the transfer mobilities TRA and the retraction of the cutting tool 637, the restitution RES of the clamping shafts and the rotational drive 612, 613 and rotational shafts ROT of the lens to obtain the mobilities of the cutting tool with respect to the lens necessary for the realization of the cutting of the lens. The finishing is then carried out by grinding on a finishing wheel of the wheel set 614. The transfer mobilities TRA of the finishing wheel and the restitution mobilities RES and ROT of rotation of the lens are controlled so as to reach the desired final contour by removing the small amount of material between the blank contour obtained by cutting in full material and the desired final contour. The grain of the finishing wheel being fine, the desired final contour is reached precisely. As a variant, it is also possible to cut the lens directly according to the desired final contour if the cutting tool is sufficiently precise.

Lorsque le système de traitement électronique et informatique 199 invite à changer le diamètre de l'adaptateur et une fois le nouvel adaptateur appliqué sur la lentille, on exécute à nouveau le procédé de vérification pour s'assurer qu'il n'y a pas eu d'erreurs de manipulation et que le nouvel adaptateur est suffisamment grand pour permettre l'entraînement en rotation de la lentille et pour empêcher la lentille de glisser par rapport audit adaptateur. Une fois l'adéquation entre l'adaptateur et la lentille validée, on procède au détourage de la lentille suivant le contour final souhaité.When the computer and electronic processing system 199 prompts to change the diameter of the adapter and once the new adapter is applied to the lens, the verification process is run again to make sure there has not been handling errors and that the new adapter is large enough to allow rotation of the lens and to prevent the lens from sliding relative to said adapter. Once the match between the adapter and the validated lens, the lens is trimmed according to the desired final contour.

Pour un résultat positif de la vérification d'adéquation, c'est-à-dire si la configuration géométrique de l'adaptateur de blocage est en adéquation avec le contour souhaité de la lentille et l'angle de mouillabilité de la lentille, on peut procéder directement à l'usinage de la lentille par meulage avec un risque de glissement de la lentille limité et sans usiner l'adaptateur de blocage. Dans ce cas il n'est pas nécessaire de réaliser d'étape de découpage en pleine matière de la lentille.For a positive result of the adequacy check, ie if the geometric configuration of the blocking adapter is in adequacy with the desired contour of the lens and the angle of wettability of the lens, then proceed directly to the machining of the lens by grinding with a risk of slipping of the limited lens and without machining the locking adapter. In this case it is not necessary to perform a cutting step in full material of the lens.

Selon un autre mode de réalisation, représenté sur la figure 3, ladite acquisition et ladite vérification de l'adéquation entre la lentille 100 et l'adaptateur de blocage sont réalisées pour les deux adaptateurs 101, 102 de blocage. On procède à cet effet au palpage simultané des deux adaptateurs 101, 102 de manière analogue à la méthode de palpage ci-dessus décrite en référence à la figure 2. L'unité de traitement électronique pilote les deux branches de palpage 90, 91 pour faire glisser les becs de palpage 92, 93 contre les faces arrières 112, 122 des rondelles 114, 124 des adaptateurs 101, 102 transversalement à l'axe de blocage A2 de la lentille jusqu'à leur échappement au niveau de l'arête 115, 125. La position d'échappement est alors mémorisée. L'opération, éventuellement répétée sur plusieurs rayons des rondelles 114, 124, permet de déterminer la position de l'arête 115, 125 par rapport à la lentille. A partir de cette mesure, l'unité de traitement électronique effectue, pour les deux adaptateurs, les vérifications d'adéquation précitées.According to another embodiment, shown in the figure 3 , said acquisition and said verification of the adequacy between the lens 100 and the locking adapter are performed for the two adapters 101, 102 blocking. This is done by simultaneously probing the two adapters 101, 102 in a similar manner to the probing method described above with reference to FIG. figure 2 . The electronic processing unit controls the two probing branches 90, 91 to slide the probing tips 92, 93 against the rear faces 112, 122 of the washers 114, 124 of the adapters 101, 102 transversely to the blocking axis A2. from the lens to their escape at the edge 115, 125. The exhaust position is then stored. The operation, possibly repeated on several shelves of the washers 114, 124, makes it possible to determine the position of the edge 115, 125 with respect to the lens. From this measurement, the electronic processing unit carries out, for the two adapters, the aforementioned adequacy checks.

En variante l'acquisition de la caractéristique géométrique de l'adaptateur de blocage peut ne pas être réalisée par palpage physique du ou des adaptateurs, mais peut être réalisée à distance (sans contact) par reconnaissance optique de caractéristiques géométriques du ou des adaptateurs.As a variant, the acquisition of the geometrical characteristic of the blocking adapter may not be performed by physical probing of the adapter or adapters, but may be performed remotely (without contact) by optical recognition of the geometric characteristics of the adapter or adapters.

Quel que soit le mode de réalisation décrit ci-dessus ou une de ces variantes, l'adaptateur peut être un gland de blocage comportant une couche adhésive appliquée sur une face de la lentille. On acquiert alors au moins une partie d'une caractéristique géométrique de ce gland. On peut également prévoir que l'adaptateur appliqué sur une face de la lentille comporte un premier adaptateur et un gland, le gland étant directement appliqué sur une face de la lentille et emboîté dans le premier adaptateur et, que l'adaptateur appliqué sur l'autre face de la lentille comporte seulement un adaptateur.Whatever the embodiment described above or one of these variants, the adapter may be a locking tassel having an adhesive layer applied to one side of the lens. At least a portion of a geometric characteristic of this glans is then acquired. It can also be provided that the adapter applied to one side of the lens comprises a first adapter and an acorn, the glans being directly applied to one side of the lens and fitted into the first adapter and that the adapter applied to the other side of the lens has only one adapter.

Claims (12)

  1. Method of trimming an optical lens, comprising the machining of a lens (100) to a desired contour (120) in accordance with a programmed machining cycle, the lens being held by at least one locking adapter (101, 102) applied to a face (108, 109) of said lens (100), and comprising, prior to this machining, a verification of the adequacy of a geometrical characteristic of the locking adapter (101, 102) with at least one of the following parameters: desired contour (120) of the lens, a characteristic of the lens (100),
    characterized in that it comprises an acquisition of said geometrical characteristic (115, 125) of the locking adapter (101, 102) by feeling with or without contact.
  2. Method according to the preceding claim, in which said verification of adequacy comprises the verification that the geometrical characteristic acquired from the locking adapter (101, 102) is adapted so that the adapter drives the lens rotation-wise without slip.
  3. Method according to one of the preceding claims, in which said adequacy verification is suitable for verifying whether the geometrical configuration of the adapter relative to the lens allows for the trimming to the desired contour without conflict with the adapter and comprises the determination of the radial extent of the locking adapter (101, 102) relative to the desired final contour (120) of the lens (100).
  4. Method according to the preceding claim, in which said adequacy verification comprises carrying out the test whereby if the radial extent of the locking adapter (101, 102) exceeds a proximity threshold for the desired final contour (120) of the lens (100) over at least a portion of this desired contour (120), the adapter is replaced with another of smaller radial extent.
  5. Method according to one of the preceding claims, comprising the conditional step according to which, if said adequacy verification culminates in a negative result, at least one of the following operations is carried out: replacement of the locking adapter (101, 102) with another locking adapter, modification of at least one characteristic of the lens machining cycle, trimming of the lens, at least partly, by cutting through said lens.
  6. Method according to one of the preceding claims, comprising the conditional step according to which, if said adequacy verification culminates in a positive result, the lens is machined by grinding the rim of the lens, without replacing the adapter or modifying the programmed machining cycle.
  7. Method according to one of the preceding claims, in which said adequacy verification comprises the verification of the adequacy of said geometrical characteristic acquired from the locking adapter (101, 102) with the wettability angle of the corresponding face of the lens (100).
  8. Method according to the preceding claim, comprising the conditional step according to which, if said geometrical characteristic acquired from the locking adapter (101, 102) is not appropriate for the wettability angle of the lens (100), the locking adapter (101, 102) is replaced with another locking adapter of greater radial extent and/or at least one characteristic of the machining cycle of the lens is modified and/or the lens is trimmed, at least partly, by cutting through said lens.
  9. Method according to one of the preceding two claims, comprising the conditional step according to which, if said geometrical characteristic acquired from the locking adapter (101, 102) is appropriate for the wettability angle of the lens (100), the lens is machined by grinding the rim of the lens, without replacing the adapter or modifying the programmed machining cycle.
  10. Method according to one of the preceding claims, in which said adequacy verification comprises verification of the adequacy of said geometrical characteristic acquired from the locking adapter (101, 102) with the programmed machining cycle.
  11. Device for trimming a lens (100), comprising means (612, 613) for supporting the lens, means for machining the lens, means for the relative transverse displacement of the lens relative to the machining means and electronic processing means able to drive the displacement means for the trimming of the lens to a desired contour (120) in accordance with a programmed machining cycle, the support means comprising at least one locking adapter (101, 102) for the lens (100) applied to a face (108, 109) of said lens (100),
    characterized in that it comprises feeling means (92, 93) with or without contact with the adapter and in that the electronic processing means are able to drive these feeling means so that they acquire at least one geometrical characteristic (115, 125) of the locking adapter (101, 102).
  12. Device according to the preceding claim, in which the electronic processing means are able to execute computation instructions designed to check the adequacy of said geometrical characteristic acquired from the locking adapter (101, 102) with at least one of the following parameters: the desired contour (120) of the lens, the programmed machining cycle, a characteristic of the lens (100).
EP07731450A 2006-06-08 2007-05-11 Device and method of trimming a lens including verification of the adequacy of a lock adapter of said lens with a characteristic of this lens or its desired shape Active EP2024135B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0605085A FR2902033B1 (en) 2006-06-08 2006-06-08 DEVICE AND METHOD FOR DETOURING A LENS COMPRISING THE VERIFICATION OF THE ADEQUACY OF A LOCKING ADAPTER OF SAID LENS WITH A CHARACTERISTIC OF THIS LENS OR ITS WISHED CONTOUR
PCT/FR2007/000809 WO2007141402A1 (en) 2006-06-08 2007-05-11 Device and method of trimming a lens including verification of the adequacy of a lock adapter of said lens with a characteristic of this lens or its desired shape

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EP2024135A1 EP2024135A1 (en) 2009-02-18
EP2024135B1 true EP2024135B1 (en) 2010-06-23

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DE (1) DE602007007321D1 (en)
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FR2945358B1 (en) * 2009-05-11 2011-12-09 Essilor Int PRODUCT COMPRISING A FLEXIBLE OPHTHALMIC LENS AND METHOD OF MOUNTING SUCH SOFT OPHTHALMIC LENS ON GLASS OF GLASSES
FR3008914B1 (en) 2013-07-26 2015-09-04 Essilor Int METHOD AND MACHINE FOR ETCHING OPTICAL LENSES

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JP2002139713A (en) * 2000-10-31 2002-05-17 Hoya Corp Method and device for mounting lens holders of spectacle lens
FR2889319B1 (en) * 2005-07-26 2007-08-24 Essilor Int METHOD OF DISTRACTING AN OPHTHALMIC LENS WITH REACQUISITION OF AN INITIAL CENTERING REFERENTIAL

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WO2007141402A1 (en) 2007-12-13
DE602007007321D1 (en) 2010-08-05
FR2902033A1 (en) 2007-12-14
EP2024135A1 (en) 2009-02-18

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