EP0961669A1 - Method for finishing spectacle lenses, and related device - Google Patents

Method for finishing spectacle lenses, and related device

Info

Publication number
EP0961669A1
EP0961669A1 EP97947109A EP97947109A EP0961669A1 EP 0961669 A1 EP0961669 A1 EP 0961669A1 EP 97947109 A EP97947109 A EP 97947109A EP 97947109 A EP97947109 A EP 97947109A EP 0961669 A1 EP0961669 A1 EP 0961669A1
Authority
EP
European Patent Office
Prior art keywords
grinder
lens
reading
spectacle lens
contour
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97947109A
Other languages
German (de)
French (fr)
Other versions
EP0961669B1 (en
Inventor
Xavier Carriou
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
Original Assignee
Essilor International Compagnie Generale dOptique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Essilor International Compagnie Generale dOptique SA filed Critical Essilor International Compagnie Generale dOptique SA
Publication of EP0961669A1 publication Critical patent/EP0961669A1/en
Application granted granted Critical
Publication of EP0961669B1 publication Critical patent/EP0961669B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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
    • 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
    • B24B9/144—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 the spectacles being used as a template

Definitions

  • the invention relates to a method for retouching spectacle lens after a first cut of it, of the type according to which, in view of a new passage of this spectacle lens on a grinder, a clean gripping block is implanted on it when placed on such a grinder.
  • a process is conventionally used by opticians for the precise adaptation of a lens to a spectacle frame of their client.
  • the invention also relates to the associated device.
  • Spectacle lenses are manufactured in the form of substantially circular parts ensuring a certain optical correction. They are then cut by the manufacturer or the optician according to the shape of the frame of the glasses chosen by the customer. It is clear that the size must be made taking into account both the shape of the frame and the position of the eyes of the user. The optical center of the lens must indeed be correctly placed in front of the eye, to produce the desired vision correction.
  • the size is carried out slightly beyond the size dimensions initially requested, and a touch-up is necessary to perfectly adapt the lens to the frame, in particular in the case of metal frames.
  • the optician it is then for the optician to make the retouching size of the glass according to the same constraints of shape and optical center, and in a time interval naturally limited by the desire of the customer to quickly recover his glasses.
  • the lens is most often removed from its initial size support, to test the lens on the frame, and the defect is only detected then.
  • the optician no longer cuts the lens directly, but transmits the measurements corresponding to a frame and a client to the lens manufacturer, who delivers him the cut and playful lens, disassembled from its support. size, this glass must then possibly be retouched.
  • the first one consists of a "judged" retouch by the optician, by cutting all or part of the outline of the glass, with obvious drawbacks of lack of precision of the shape or partial off-center of the optical center relative to the eye of the user.
  • the second method consists in using an automated machine which requires the optician to center (orientation) and center (position) the glass precisely, then to implant the gripping block on the glass at a precise point in taking into account the position of the user's eye.
  • the optician then probes with a mechanical or digital contour reader the desired final shape for the lens, corresponding to the client's frame.
  • the contour reader then controls the grinding of the blocked glass and placed on the grinder according to the desired final shape. This method is complex and time-consuming, and any positioning error affects the final shape of the glass after grinding.
  • the invention relates, for its part, to a method for retouching spectacle lens, which is quick to use, which enables precise retouching of the lens to be carried out.
  • the invention provides for this purpose a method for retouching a spectacle lens after a first size thereof, of the kind according to which, in view of a new passage of this spectacle lens on a grinder, one implants on it a gripping block suitable for its installation on such a grinder, characterized in that the block is implanted at any point on the spectacle lens preferably close to the center, the contour of the spectacle lens is read. leading to the reading of a form read for this spectacle lens, and the grinder is operated according to the difference between this read form and the final shape sought.
  • the form read is compared to the final form sought, a grinding function is established taking into account the difference between this read form and this final form, and the grinder is piloted accordingly.
  • the invention also relates to a device for implementing a method in accordance with the preceding description, comprising means suitable for a comparison between two forms and means suitable for establishing a grinding function taking account of the difference between these two forms.
  • FIG. 1 is a schematic representation of the principle of reading the contour of the glass
  • FIG. 2 is a representation of the final shape sought for the glass
  • FIG. 3 is a diagram of the grinding path for touching up the glass according to the desired final shape.
  • the optician has a device for implanting a gripping block on glass of retouching glasses, an apparatus 2 for reading the contour, for example of a mechanical nature, and a bezel glass grinder, these various means being of a conventional nature in the field and therefore not being detailed here further.
  • a gripping block 3 which is for example in the form of a
  • acorn is firstly fixed by the optician at any point 4, preferably close to the center of the glass 5, and the glass 1 is thus secured to an axis A substantially perpendicular to its reference plane.
  • the glass is then fixed in the contour reader 2 (FIG. 1), around its block 3 for example, in any orientation characterized by the axes 6, 7.
  • the shape information 9 read from the glass, obtained by this probe 8 is transmitted to a control unit, which is conventionally a computer integrated into the contour reader 2.
  • the final shape 10 sought for the glass is also stored in a known manner in the control unit, and is for example defined (FIG.
  • the computer controls the grinding, carried out on part or all of the contour of the glass 1, in a conventional manner.
  • the method has an advantage of simplicity of use for the optician, and time saving overall, the time taken to read the contour and calculate the correction of the grinding trajectory being largely compensated by the elimination of the centering and orientation time of the lens by the optician.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)
  • Prostheses (AREA)

Abstract

The invention concerns a method for finishing a spectacle lens (1) after it has been cut a first time, in order to pass said spectacle lens again on the grinder, which consists in implanting thereon a prehensile block (3) for setting it on such a grinder. The invention is characterised in that it consists in implanting the block (3) at some point (4) of the spectacle lens preferably close to the centre (5), in reading the spectacle lens (1) outline leading to a reading of the read form (9) for said spectacle lens, and in actuating the grinder on the basis of the difference between said read form and the desired final form (10).

Description

"Procédé de retouche de verre de lunettes, et dispositif associé" "Method for touching up spectacle lenses, and associated device"
L'invention concerne un procédé de retouche de verre de lunettes après une première taille de celui-ci, du genre suivant lequel, en vue d'un nouveau passage de ce verre de lunettes sur une meuleuse on implante sur lui un bloc de préhension propre à sa mise en place sur une telle meuleuse. Un tel procédé est classiquement utilisé par les opticiens pour l'adaptation précise d'un verre à une monture de lunettes de leur client. L'invention concerne également le dispositif associé.The invention relates to a method for retouching spectacle lens after a first cut of it, of the type according to which, in view of a new passage of this spectacle lens on a grinder, a clean gripping block is implanted on it when placed on such a grinder. Such a process is conventionally used by opticians for the precise adaptation of a lens to a spectacle frame of their client. The invention also relates to the associated device.
Les verres de lunettes sont fabriqués sous la forme de pièces sensiblement circulaires assurant une certaine correction optique. Ils sont ensuite taillés par le fabricant ou l'opticien selon la forme de la monture des lunettes choisie par le client. II est clair que la taille doit être effectuée en tenant compte à la fois de la forme de la monture et de la position des yeux de l'utilisateur. Le centre optique du verre doit en effet être correctement placé en face de l'œil, pour produire la correction de vision souhaitée.Spectacle lenses are manufactured in the form of substantially circular parts ensuring a certain optical correction. They are then cut by the manufacturer or the optician according to the shape of the frame of the glasses chosen by the customer. It is clear that the size must be made taking into account both the shape of the frame and the position of the eyes of the user. The optical center of the lens must indeed be correctly placed in front of the eye, to produce the desired vision correction.
Le plus souvent, la taille est réalisée légèrement au delà des cotes de taille demandées initialement, et une retouche s'avère nécessaire pour adapter parfaitement le verre à la monture, en particulier dans le cas de montures métalliques.Most often, the size is carried out slightly beyond the size dimensions initially requested, and a touch-up is necessary to perfectly adapt the lens to the frame, in particular in the case of metal frames.
II s'agit alors pour l'opticien de réaliser la taille de retouche du verre selon les mêmes contraintes de forme et de centre optique, et dans un intervalle de temps naturellement limité par le désir du client de récupérer rapidement ses lunettes. Dans la pratique courante, le verre est le plus souvent démonté de son support de taille initial, pour essayer le verre sur la monture, et le défaut est seulement détecté alors. De même, il arrive de plus en plus couramment que l'opticien ne taille plus le verre directement, mais transmette les mesures correspondant à une monture et un client au fabricant de verre, qui lui livre le verre taillé et bizeaute, démonté de son support de taille, ce verre devant alors éventuellement être retouché.It is then for the optician to make the retouching size of the glass according to the same constraints of shape and optical center, and in a time interval naturally limited by the desire of the customer to quickly recover his glasses. In current practice, the lens is most often removed from its initial size support, to test the lens on the frame, and the defect is only detected then. Likewise, it is more and more common that the optician no longer cuts the lens directly, but transmits the measurements corresponding to a frame and a client to the lens manufacturer, who delivers him the cut and bizarre lens, disassembled from its support. size, this glass must then possibly be retouched.
Deux méthodes de retouche sont actuellement utilisées. La première consiste en une retouche "au jugé" par l'opticien, en retaillant tout ou partie du contour du verre, avec des inconvénients évidents de manque de précision de la forme ou de décentrage partiel du centre optique par rapport à l'œil de l'utilisateur.Two retouching methods are currently used. The first one consists of a "judged" retouch by the optician, by cutting all or part of the outline of the glass, with obvious drawbacks of lack of precision of the shape or partial off-center of the optical center relative to the eye of the user.
La deuxième méthode consiste à utiliser une machine automatisée qui exige de la part de l'opticien d'axer (orientation) et de centrer (position) le verre précisément, puis d'implanter le bloc de préhension sur le verre en un point précis en prenant en compte la position de l'œil de l'utilisateur. L'opticien procède alors au palpage par un lecteur de contour mécanique ou numérique de la forme finale recherchée pour le verre, correspondant à la monture du client. Le lecteur de contour pilote alors le meulage du verre bloqué et placé sur le meuleuse selon la forme finale recherchée. Cette méthode est complexe et longue, et toute erreur de positionnement se répercute après meulage sur la forme finale du verre.The second method consists in using an automated machine which requires the optician to center (orientation) and center (position) the glass precisely, then to implant the gripping block on the glass at a precise point in taking into account the position of the user's eye. The optician then probes with a mechanical or digital contour reader the desired final shape for the lens, corresponding to the client's frame. The contour reader then controls the grinding of the blocked glass and placed on the grinder according to the desired final shape. This method is complex and time-consuming, and any positioning error affects the final shape of the glass after grinding.
L'invention vise quant-à-elle un procédé de retouche de verre de lunettes, rapide d'utilisation, qui permette d'effectuer une retouche précise du verre.The invention relates, for its part, to a method for retouching spectacle lens, which is quick to use, which enables precise retouching of the lens to be carried out.
L'invention propose à cet effet un procédé pour la retouche d'un verre de lunettes après une première taille de celui-ci, du genre suivant lequel, en vue d'un nouveau passage de ce verre de lunettes sur une meuleuse, on implante sur lui un bloc de préhension propre à sa mise en place sur une telle meuleuse, caractérisé en ce qu'on implante le bloc en un point quelconque du verre de lunettes préférentiellement proche du centre, on procède à la lecture de contour du verre de lunettes conduisant au relevé d'une forme lue pour ce verre de lunettes, et on actionne la meuleuse en fonction de la différence entre cette forme lue et la forme finale recherchée.The invention provides for this purpose a method for retouching a spectacle lens after a first size thereof, of the kind according to which, in view of a new passage of this spectacle lens on a grinder, one implants on it a gripping block suitable for its installation on such a grinder, characterized in that the block is implanted at any point on the spectacle lens preferably close to the center, the contour of the spectacle lens is read. leading to the reading of a form read for this spectacle lens, and the grinder is operated according to the difference between this read form and the final shape sought.
Préférentiellement, dans le procédé, on compare la forme lue à la forme finale recherchée, on établit une fonction de meulage tenant compte de la différence entre cette forme lue et cette forme finale , et on pilote en conséquence la meuleuse.Preferably, in the method, the form read is compared to the final form sought, a grinding function is established taking into account the difference between this read form and this final form, and the grinder is piloted accordingly.
On comprend que ce procédé permet de compenser une position décalée du bloc sur le verre par l'opticien, grâce à la lecture de la forme, qui sert de référence pour son propre meulage, au lieu d'utiliser comme référence, ainsi que dans l'art antérieur, le centre du verre, qui devait donc être déterminé avec précision comme on l'a dit.It is understood that this process makes it possible to compensate for an offset position of the block on the glass by the optician, thanks to the reading of the form, which serves as a reference. for its own grinding, instead of using as a reference, as in the prior art, the center of the glass, which therefore had to be determined with precision as has been said.
L'invention vise également un dispositif pour la mise en œuvre d'un procédé conforme à l'exposé précédent, comportant des moyens propres à une comparaison entre deux formes et des moyens propres à l'établissement d'une fonction de meulage tenant compte de la différence entre ces deux formes.The invention also relates to a device for implementing a method in accordance with the preceding description, comprising means suitable for a comparison between two forms and means suitable for establishing a grinding function taking account of the difference between these two forms.
La description et le dessin d'un mode préféré de réalisation de l'invention, donnés ci-après, permettront de mieux comprendre les buts et avantages de l'invention. II est clair que cette description est donnée à titre d'exemple, et n'a pas de caractère limitatif. Dans les dessins,The description and the drawing of a preferred embodiment of the invention, given below, will make it possible to better understand the aims and advantages of the invention. It is clear that this description is given by way of example, and is not limiting. In the drawings,
- la figure 1 est une représentation schématique du principe de lecture de contour du verre,FIG. 1 is a schematic representation of the principle of reading the contour of the glass,
- la figure 2 est une représentation de la forme finale recherchée pour le verre,FIG. 2 is a representation of the final shape sought for the glass,
- la figure 3 est une schématisation de la trajectoire de meulage pour la retouche du verre selon la forme finale recherchée.- Figure 3 is a diagram of the grinding path for touching up the glass according to the desired final shape.
Pour la mise en œuvre du procédé, l'opticien dispose d'un dispositif d'implantation de bloc de préhension sur verre de lunette à retoucher, d'un appareil 2 de lecture de contour, par exemple de nature mécanique, et d'une meuleuse de verre de lunette, ces différents moyens étant de nature classique dans le domaine et n'étant donc pas détaillés ici plus avant.For the implementation of the method, the optician has a device for implanting a gripping block on glass of retouching glasses, an apparatus 2 for reading the contour, for example of a mechanical nature, and a bezel glass grinder, these various means being of a conventional nature in the field and therefore not being detailed here further.
Lors de la retouche d'un verre de lunette 1 supposé initialement taillé trop grand, un bloc de préhension 3, qui se présente par exemple sous la forme d'unWhen touching up a spectacle lens 1 supposed to be initially cut too large, a gripping block 3, which is for example in the form of a
"gland", est tout d'abord fixé par l'opticien en un point quelconque 4, préférentiellement proche du centre du verre 5, et le verre 1 est ainsi solidarisé d'un axe A sensiblement perpendiculaire à son plan de référence. Le verre est alors fixé dans le lecteur de contour 2 (figure 1), autour de son bloc 3 par exemple, dans une orientation quelconque caractérisée par les axes 6, 7. Dans le cas d'un lecteur de contour mécanique, un palpeur 8 vient relever la forme lue 9 du verre, au cours d'une rotation du verre 1 autour de l'axe A, déterminant ainsi une fonction de type R=f(α), où R est la distance du point lu à l'axe A, et l'angle de rotation du verre depuis sa position initiale de blocage. Les informations de forme lue 9 du verre, obtenues par ce palpeur 8 sont transmises à une unité de pilotage, qui est classiquement un calculateur intégré au lecteur de contour 2. La forme finale 10 recherchée pour le verre est également mémorisée d'une façon connue dans l'unité de pilotage, et est par exemple définie (figure 2), d'une part, par un point 11 dit "centre boxing", qui correspond au centre d'un rectangle 12 dans lequel la forme finale recherchée est inscrite, ledit rectangle ayant des directions principales 13, 14 correspondant à la verticale et à l'horizontale de la monture en position de port par l'utilisateur, d'autre part, par deux axes perpendiculaires par exemple selon les directions 13, 14 du rectangle dans lequel la forme finale recherchée 10 est inscrite, enfin par une fonction en coordonnées polaires R1=f1 (β), avec R1 distance du point de la forme finale recherchée du verre 1 à son centre 11 pour une rotation β autour des axes théoriques 13, 14. Le "placement" par le calculateur de la forme finale recherchée 10 dans la forme lue 9 (figure 3) est effectué par un moyen connu de l'homme du métier, et par exemple par utilisation d'un algorithme de recherche de distance minimum de la forme lue 9 à la forme finale recherchée 10. Il est clair que la forme lue 9 est supposée proche de la forme souhaitée 10. On obtient finalement une fonction de meulage R2=f2(α) correspondant à la transformation de la fonction f1 de forme finale 10 dans le repère 11 , 13, 14 en une fonction autour du repère 4, 6, 7."acorn" is firstly fixed by the optician at any point 4, preferably close to the center of the glass 5, and the glass 1 is thus secured to an axis A substantially perpendicular to its reference plane. The glass is then fixed in the contour reader 2 (FIG. 1), around its block 3 for example, in any orientation characterized by the axes 6, 7. In the case of a mechanical contour reader, a probe 8 pick up the read form 9 of the glass, during a rotation of the glass 1 around the axis A, thus determining a function of type R = f (α), where R is the distance from the point read to the axis A, and the angle of rotation of the lens from its initial blocking position. The shape information 9 read from the glass, obtained by this probe 8 is transmitted to a control unit, which is conventionally a computer integrated into the contour reader 2. The final shape 10 sought for the glass is also stored in a known manner in the control unit, and is for example defined (FIG. 2), on the one hand, by a point 11 called "boxing center", which corresponds to the center of a rectangle 12 in which the desired final shape is registered, said rectangle having main directions 13, 14 corresponding to the vertical and the horizontal of the frame in the wearing position by the user, on the other hand, by two perpendicular axes for example along the directions 13, 14 of the rectangle in which the desired final shape 10 is entered, finally by a function in polar coordinates R1 = f1 (β), with R1 distance from the point of the desired final shape of the glass 1 to its center 11 for a rotation β around the theoretical axes 13, 14. The “placement” by the computer of the final form sought 10 in the form read 9 (FIG. 3) is carried out by means known to those skilled in the art, and for example by using a distance search algorithm. minimum of the form read 9 to the final form sought 10. It is clear that the form read 9 is assumed to be close to the desired form 10. Finally, a grinding function is obtained R2 = f2 (α) corresponding to the transformation of the function f1 of final form 10 in the reference 11, 13, 14 in a function around the reference 4, 6, 7.
En fonction de ces résultats, le calculateur pilote le meulage, réalisé sur une partie ou sur la totalité du contour du verre 1 , de façon classique.Depending on these results, the computer controls the grinding, carried out on part or all of the contour of the glass 1, in a conventional manner.
Comme on peut le comprendre à la lecture de la description, le procédé présente un avantage de simplicité d'utilisation pour l'opticien, et de gain de temps global, le temps de lecture du contour et de calcul de correction de trajectoire de meulage étant largement compensé par la suppression du temps de centrage et orientation du verre par l'opticien.As can be understood on reading the description, the method has an advantage of simplicity of use for the optician, and time saving overall, the time taken to read the contour and calculate the correction of the grinding trajectory being largely compensated by the elimination of the centering and orientation time of the lens by the optician.
On a présenté dans la description une fixation par gland, qui est classique dans ce domaine. Il n'en demeure pas moins que tout type de fixation du verre est satisfaisant pour l'invention, dans la mesure où il garantit une position fixe du verre relativement à la machine à meuler. Une fixation par ventouse est ainsi utilisable, sans modification du procédé. Dans une variante de positionnement de la forme finale recherchée 10 dans la forme lue 9, un algorithme de détermination des axes principaux d'inertie et de centre d'inertie des deux formes est utilisable, du fait que la forme lue est supposée être proche de la forme finale recherchée 10, avec seulement quelques corrections mineures de contour. Dans une autre variante, le palpeur et la meuleuse sont intégrés au sein d'une même machine, de façon telle que l'axe de lecture et l'axe de meulage sont confondus.We have presented in the description a fixing by acorn, which is conventional in this area. The fact remains that any type of fixing of the glass is satisfactory for the invention, insofar as it guarantees a fixed position of the glass relative to the grinding machine. A suction cup attachment can thus be used without modifying the process. In a variant of positioning the final form sought 10 in the read form 9, an algorithm for determining the main axes of inertia and center of inertia of the two forms can be used, since the read form is assumed to be close to the desired final shape 10, with only a few minor contour corrections. In another variant, the probe and the grinder are integrated within the same machine, so that the reading axis and the grinding axis are combined.
La portée de la présente invention ne se limite pas aux détails des formes de réalisation ci-dessus considérées à titre d'exemple, mais s'étend au contraire aux modifications à la portée de l'homme de l'art. The scope of the present invention is not limited to the details of the above embodiments considered by way of example, but on the contrary extends to modifications within the reach of ordinary skill in the art.

Claims

REVENDICATIONS
1. Procédé pour la retouche d'un verre de lunettes (1) après une première taille de celui-ci, du genre suivant lequel, en vue d'un nouveau passage de ce verre de lunettes sur une meuleuse, on implante sur lui un bloc de préhension (3) propre à sa mise en place sur une telle meuleuse, caractérisé en ce qu'on implante le bloc (3) en un point (4) quelconque du verre de lunettes préférentiellement proche du centre (5), on procède à la lecture de contour du verre de lunettes (1) conduisant au relevé d'une forme lue (9) pour ce verre de lunettes, et on actionne la meuleuse en fonction de la différence entre cette forme lue et la forme finale recherchée (10).1. Method for retouching a spectacle lens (1) after a first size thereof, of the type according to which, with a view to passing this spectacle lens over a grinder, a lens is implanted on it gripping block (3) suitable for its installation on such a grinder, characterized in that the block (3) is implanted at any point (4) of the spectacle lens preferably close to the center (5), we proceed when reading the outline of the spectacle lens (1) leading to the reading of a read form (9) for this spectacle lens, and the grinder is operated as a function of the difference between this read form and the desired final shape (10 ).
2. Procédé suivant la revendication 1 caractérisé en ce que on compare la forme lue (9) à la forme finale recherchée (10), on établit une fonction de meulage tenant compte de la différence entre cette forme lue (9) et cette forme finale (10), et on pilote en conséquence la meuleuse.2. Method according to claim 1 characterized in that the read form (9) is compared to the desired final form (10), a grinding function is established taking into account the difference between this read form (9) and this final form (10), and the grinder is piloted accordingly.
3. Dispositif pour la mise en œuvre d'un procédé conforme à la revendication 2, caractérisé en ce qu'il comporte des moyens propres à une comparaison entre deux formes et des moyens propres à l'établissement d'une fonction de meulage tenant compte de la différence entre ces deux formes.3. Device for implementing a method according to claim 2, characterized in that it comprises means specific to a comparison between two forms and means suitable for establishing a grinding function taking into account of the difference between these two forms.
4. Dispositif suivant la revendication 3, caractérisé en ce qu'il est intégré à un appareil (2) de lecture de contour.4. Device according to claim 3, characterized in that it is integrated into an apparatus (2) for contour reading.
5. Dispositif suivant la revendication 3, caractérisé en ce qu'il est intégré à une meuleuse.5. Device according to claim 3, characterized in that it is integrated with a grinder.
6. Dispositif suivant l'une quelconque des revendications 3 à 5, caractérisé en ce que le bloc de préhension (3) est un gland. 6. Device according to any one of claims 3 to 5, characterized in that the gripping block (3) is a glans.
7. Dispositif suivant l'une quelconque des revendications 3 à 5, caractérisé en ce que le bloc de préhension (3) est une ventouse.7. Device according to any one of claims 3 to 5, characterized in that the gripping block (3) is a suction cup.
8. Dispositif selon l'une quelconque des revendications 3 à 7, caractérisé en ce qu'il comporte un moyen numérique de lecture de contour du verre (1) de lunette.8. Device according to any one of claims 3 to 7, characterized in that it comprises a digital means for reading the contour of the lens (1) of the lens.
9. Dispositif selon l'une quelconque des revendications 3 à 7, caractérisé en ce qu'il comporte un moyen mécanique de lecture de contour du verre (1) de lunette.9. Device according to any one of claims 3 to 7, characterized in that it comprises a mechanical means for reading the contour of the lens (1) of the lens.
10. Dispositif selon l'une quelconque des revendications 3 à 9, caractérisé en ce que le moyen de lecture de contour comporte un moyen de positionnement du verre (1) par son bloc (3) de préhension.10. Device according to any one of claims 3 to 9, characterized in that the contour reading means comprises a means for positioning the glass (1) by its block (3) for gripping.
11. Dispositif selon l'une quelconque des revendications 3 à 10, caractérisé en ce qu'il est intégré à une machine faisant à la fois office de meuleuse et de lecteur de contour, dont les axes de lecture et de meulage sont confondus. 11. Device according to any one of claims 3 to 10, characterized in that it is integrated into a machine acting both as a grinder and as a contour reader, whose reading and grinding axes are combined.
EP97947109A 1997-11-20 1997-11-20 Method for finishing spectacle lenses, and related device Expired - Lifetime EP0961669B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR1997/002099 WO1999026759A1 (en) 1997-11-20 1997-11-20 Method for finishing spectacle lenses, and related device

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EP0961669A1 true EP0961669A1 (en) 1999-12-08
EP0961669B1 EP0961669B1 (en) 2002-06-05

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EP97947109A Expired - Lifetime EP0961669B1 (en) 1997-11-20 1997-11-20 Method for finishing spectacle lenses, and related device

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US (1) US6250993B1 (en)
EP (1) EP0961669B1 (en)
JP (1) JP2001516289A (en)
DE (1) DE69713161T2 (en)
ES (1) ES2178018T3 (en)
WO (1) WO1999026759A1 (en)

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WO2007012713A1 (en) 2005-07-26 2007-02-01 Essilor International (Compagnie Generale D'optique) Method for trimming an ophthalmologic lens with reacquisition of an initial centering reference frame
FR2893724A1 (en) * 2005-11-24 2007-05-25 Essilor Int Ophthalmic lens working e.g. trimming method for mounting lens on frame involves embedding beveling groove with bevel from acquired geometrical coordinates by using relative mobility of lens with respect to finishing stone

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WO2007012713A1 (en) 2005-07-26 2007-02-01 Essilor International (Compagnie Generale D'optique) Method for trimming an ophthalmologic lens with reacquisition of an initial centering reference frame
FR2893724A1 (en) * 2005-11-24 2007-05-25 Essilor Int Ophthalmic lens working e.g. trimming method for mounting lens on frame involves embedding beveling groove with bevel from acquired geometrical coordinates by using relative mobility of lens with respect to finishing stone

Also Published As

Publication number Publication date
US6250993B1 (en) 2001-06-26
EP0961669B1 (en) 2002-06-05
DE69713161D1 (en) 2002-07-11
DE69713161T2 (en) 2003-01-16
JP2001516289A (en) 2001-09-25
ES2178018T3 (en) 2002-12-16
WO1999026759A1 (en) 1999-06-03
WO1999026759A8 (en) 2000-03-02

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