EP0206860B2 - Apparatus for centering and placing an adapter on a lens blank and for controlling a grinding machine - Google Patents

Apparatus for centering and placing an adapter on a lens blank and for controlling a grinding machine Download PDF

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Publication number
EP0206860B2
EP0206860B2 EP86401062A EP86401062A EP0206860B2 EP 0206860 B2 EP0206860 B2 EP 0206860B2 EP 86401062 A EP86401062 A EP 86401062A EP 86401062 A EP86401062 A EP 86401062A EP 0206860 B2 EP0206860 B2 EP 0206860B2
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EP
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Prior art keywords
screen
image
frame
blank
adaptor
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EP86401062A
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German (de)
French (fr)
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EP0206860A1 (en
EP0206860B1 (en
Inventor
Jean-Pierre Langlois
Jean Claude Paimpol
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Briot International SA
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Briot International SA
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Application filed by Briot International SA filed Critical Briot International SA
Priority to AT86401062T priority Critical patent/ATE37678T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B24B13/0055—Positioning of lenses; Marking of lenses

Definitions

  • the blank and the template are transferred to the grinding machine, or else a device as described in the abovementioned patent applications can be used, if the latter contains the data of the template or the mount.
  • the subject of the invention is therefore an apparatus for centering and placing an adapter on an optical glass blank according to claim 1 and a method according to claim 7.
  • said flat screen is of the liquid crystal type.
  • a sheet of transparent material disposed on said screen and having in its middle two graduated orthogonal axes.
  • said means for displaying and moving an image of a frame or a template given on the screen are constituted by a programmable electronic computer.
  • Figure 1 is a plan view of a caliber showing its axis and its geometric center.
  • FIG. 3 schematically shows the eyes of a user wearing a spectacle frame on which gauges as shown in FIG. 1 are adapted.
  • a caliber 1 is usually drilled in the center of a hole 2 and also includes two small holes 3 located at an equal distance from the center of the hole 2 and determining an axis of origin O which is parallel to a straight line joining the pupils of the user when the template is mounted on a pair of glasses worn by the user.
  • the template also includes a second axis H orthogonal to axis O and passing through the geometric center of the template.
  • the pupils P of a user wearing a frame M are spaced by a distance called pupillary distance EP while the geometric centers of the templates (or circles of the frames) are spaced by a distance EGM representing the geometric deviation of the frame which, in this example, is slightly greater than the distance EP.
  • an adapter is placed on the center of rotation of the lens which corresponds to the geometric center of the template, in a known manner.
  • the apparatus according to the invention allows this centering to be carried out with ease and precision.
  • the support 5 carries at its upper part a flat electronic screen 7 which is for example a display screen of the liquid crystal type.
  • the support 5 contains an electronic assembly constituted by a computer 8 connected to the screen 7 in an appropriate manner, a data bank 9 or other appropriate memory system, and a data entry device 10. This electronic assembly is connected to a grinder 11 with numerical control.
  • a sheet 12 for example of transparent plastic material or send carrying in its middle two orthogonal axes X, Y which are graduated.
  • the keyboard 6 includes a control device 14 which, according to the example shown, consists of keys.
  • the device mounted on the rear part of the support 5 comprises a fixed vertical upright 15 on which is slidably mounted an elongated body 16 urged upwards against a stop 17 by means of a spring 18.
  • the body 16 has at one end a first arm 19 extending horizontally and at its opposite end a second arm 20 also extending horizontally but offset by 90 ° C relative to arm 19 and of the same length.
  • the full-size image of a chosen frame whose data is stored in the bank 9 is displayed on the screen 7 by means of the computer 8.
  • the computer having in memory the data corresponding to the chosen frame progressively records the displacements of the shape from its position from the entry or storage position and calculates the differences with respect to the data of the frame and restores the shape of the frame centered according to the pupil position of the user.
  • the body 16 of the device is then rotated by 90 ° to bring the adapter 22 into position above the blank and place it thereon.
  • the input device 10 contained in the electronic assembly of the device can be a device as described in FR-A-2 229 213 which includes a probe adapted to follow the contours of a frame circle or a template and transmit signals which can be entered directly into the computer 8 in place of the data stored in the bank 9.
  • the device according to the invention allows centering to be carried out at the particular dimensions of the end user of the frame and that, if desired, a printer can be connected to the computer 8 in order to print all the dimensions d '' a given lens, intended for the manufacturer to make this lens for a given frame and a given client (pre-calibrated lenses).
  • the screen 7 used having a definition of a few tenths of a millimeter, we obtain with the apparatus according to the invention a completely satisfactory precision.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

The apparatus comprises a flat electronic screen (7), means (14) for displacing on the screen an image, stored in a data bank (9), of a given template or frame of spectacles, and means (8) for recording the displacements of the image on the screen (7), storing in memory the differences of its final coordinates with respect to a reference position constituted by the intersection of two orthogonal axes X, Y and calculating the resulting data and applying them directly to a grinder (11).

Description

La présente invention concerne le centrage des ébauches de verres optiques préalablement à l'opération de meulage de ceux-ci à la dimension des cercles d'une monture donnée, sur une rectifieuse, ainsi que la commande d'un verre précalibré.The present invention relates to the centering of the blanks of optical glasses prior to the operation of grinding them to the dimension of the circles of a given frame, on a grinding machine, as well as the control of a precalibrated glass.

On sait qu'une ébauche de verre optique est maintenue entre deux extrémités d'un arbre divisé d'une rectifieuse au moyen d'un adaptateur, qui est habituellement une ventouse appliquée avec précision sur l'axe de rotation de l'ébauche.It is known that an optical glass blank is held between two ends of a divided shaft of a grinding machine by means of an adapter, which is usually a suction cup applied with precision on the axis of rotation of the blank.

Ce centrage de l'adaptateur est une opération complexe qui doit être effectuée en tenant compte de divers facteurs qui sont différents pour chaque utilisateur. La précision de cette opération conditionne la bonne exécution de la rectification de l'ébauche et la meilleure adaptation des verres à l'utilisateur des lunettes finies.This centering of the adapter is a complex operation which must be carried out taking into account various factors which are different for each user. The precision of this operation conditions the correct execution of the rectification of the blank and the best adaptation of the lenses to the user of the finished spectacles.

Il est déjà connu d'utiliser des systèmes électroniques pour commander des rectifieuses au moyen de banques de données contenant en mémoire les caractéristiques de différentes montures, ou au moyen d'un dispositif comportant un palpeur qui mesure des rayons d'une monture, ou d'un gabarit particulier et engendre des signaux de données qui sont appliqués à la rectifieuse par l'intermédiaire d'un calculateur pourvu d'un écran permettant d'afficher la forme des cercles de la monture ou celle du gabarit pour contrôle.It is already known to use electronic systems to control grinding machines by means of databases containing in memory the characteristics of different mounts, or by means of a device comprising a probe which measures the radii of a mount, or 'a particular template and generates data signals which are applied to the grinding machine by means of a computer provided with a screen making it possible to display the shape of the circles of the frame or that of the template for control.

Le brevet EP-A-0 092 364 décrit notamment un procédé et un appareil pour sa mise en oeuvre, de même que le brevet FR-A-2 547 930 qui a plus particulièrement pour objet une rectifieuse à commande numérique.Patent EP-A-0 092 364 describes in particular a process and an apparatus for its implementation, as well as patent FR-A-2 547 930 which more particularly relates to a grinding machine with numerical control.

Si perfectionnés et pratiques que soient ces procédés et ces appareils, ils laissent cependant subsister une lacune importante en ce qui concerne l'opération, d'une importance primordiale d'une part pour la bonne exécution de la rectification et d'autre part pour la parfaite adaptation des lunettes finies à leur utilisateur, et qui consiste à centrer l'adaptateur sur l'ébauche du verre.As sophisticated and practical as these processes and these devices are, they nevertheless leave an important gap with regard to the operation, of paramount importance on the one hand for the correct execution of the rectification and on the other hand for the perfect adaptation of the finished glasses to their user, which consists in centering the adapter on the blank of the lens.

En l'état actuel de la technique, cette opération préalable à la rectification est effectuée séparément, et les principaux procédés les plus couramment utilisés sont:

  • ― la superposition réelle, manuelle, du verre contre le calibre ou la monture; cette solution manque de précision car elle ne permet pas de bien contrôler les centres respectifs;
  • ― l'utilisation d'un système de semi-miroirs qui permet d'observer directement la superposition des images optiques du calibre et du verre qui est posé sur une tablette graduée transparente;
  • ― l'utilisation d'un système optique à prisme procurant la même superposition d'images.
In the current state of the art, this operation prior to rectification is carried out separately, and the main methods most commonly used are:
  • - the real, manual superimposition of the lens against the caliber or the frame; this solution lacks precision because it does not allow proper control of the respective centers;
  • - the use of a semi-mirror system which allows direct observation of the superimposition of optical images of the caliber and of the glass which is placed on a transparent graduated tablet;
  • - the use of a prism optical system providing the same superposition of images.

Après avoir posé l'adaptateur, on reporte l'ébauche et le gabarit sur la rectifieuse, ou bien on peut utiliser un appareil tel que décrit dans les demandes de brevet précitées, si celui-ci contient en mémoire les données du gabarit ou de la monture.After having installed the adapter, the blank and the template are transferred to the grinding machine, or else a device as described in the abovementioned patent applications can be used, if the latter contains the data of the template or the mount.

L'invention a pour but de simplifier ces différentes opérations en fournissant un appareil perfectionné de centrage et de pose de l'adaptateur sur une ébauche de verre optique d'une façon plus précise, cet appareil établissant lui-même les informations nécessaires à la commande directe de la rectifieuse en fonction des données morphologiques particulières de l'utilisateur et de celles de la monture choisie.The invention aims to simplify these different operations by providing an improved device for centering and fitting the adapter on a rough optical glass roughly, this device itself establishing the information necessary for the direct control of the grinding machine according to the particular morphological data of the user and that of the chosen frame.

L'invention a pour objet à cet effet un appareil pour centrer et poser un adaptateur sur une ébauche de verre optique selon la revendication 1 et un procédé selon la revendication 7.The subject of the invention is therefore an apparatus for centering and placing an adapter on an optical glass blank according to claim 1 and a method according to claim 7.

Suivant une autre caractéristique de l'invention, ledit écran plat est du type à cristaux liquides.According to another characteristic of the invention, said flat screen is of the liquid crystal type.

De préférence il est prévu une feuille d'une matière transparente disposée sur ledit écran et comportant en son milieu deux axes orthogonaux gradués.Preferably there is provided a sheet of transparent material disposed on said screen and having in its middle two graduated orthogonal axes.

Suivant un mode de réalisation de l'invention, lesdits moyens pour afficher et déplacer une image d'une monture ou d'un gabarit donnés sur l'écran sont constitués par un calculateur électronique programmable.According to an embodiment of the invention, said means for displaying and moving an image of a frame or a template given on the screen are constituted by a programmable electronic computer.

D'une façon avantageuse, lesdits moyens pour enregistrer les déplacements de l'image sur l'écran et mémoriser les différences de ces coordonnées finales par rapport à la position de saisie ou de stockage de données sont constitués par ledit calculateur.Advantageously, said means for recording the displacements of the image on the screen and memorizing the differences in these final coordinates with respect to the data entry or storage position are constituted by said computer.

La description qui va suivre, en regard des dessins annexés à titre d'exemples non limitatifs, permettra de bien comprendre comment la présente invention peut être mise en pratique.The description which follows, with reference to the accompanying drawings by way of nonlimiting examples, will make it possible to understand clearly how the present invention can be put into practice.

La figure 1 est une vue en plan d'un calibre montrant son axe et son centre géométrique.Figure 1 is a plan view of a caliber showing its axis and its geometric center.

La figure 2 montre un verre optique tracé, superposé à une calibre.Figure 2 shows a traced optical glass, superimposed on a caliber.

La figure 3 montre schématiquement les yeux d'un utilisateur portant une monture de lunettes sur laquelle sont adaptés des calibres tels que représentés à la figure 1.FIG. 3 schematically shows the eyes of a user wearing a spectacle frame on which gauges as shown in FIG. 1 are adapted.

La figure 4 est une vue en perspective de l'appareil suivant l'invention.Figure 4 is a perspective view of the apparatus according to the invention.

La figure 5 est un schéma synoptique de l'appareil représenté à la figure 4.Figure 5 is a block diagram of the apparatus shown in Figure 4.

En se référant à la figure 1, un calibre 1 est habituellement percé en son centre d'un trou 2 et comporte également deux petits trous 3 situés à une distance égale par rapport au centre du trou 2 et déterminant un axe d'origine O qui est parallèle à une droite joignant les pupilles de l'utilisateur lorsque le gabarit est monté sur une paire de lunettes portée par celui-ci. Le gabarit comporte également un second axe H ortogonal à l'axe O et passant par le centre géométrique du gabarit.Referring to Figure 1, a caliber 1 is usually drilled in the center of a hole 2 and also includes two small holes 3 located at an equal distance from the center of the hole 2 and determining an axis of origin O which is parallel to a straight line joining the pupils of the user when the template is mounted on a pair of glasses worn by the user. The template also includes a second axis H orthogonal to axis O and passing through the geometric center of the template.

Une ébauche de verre optique désignée par la référence 4 à la figure 2 porte, tracés sur elle, deux axes orthogonaux O' et H' croisés au centre optique de l'ébauche et qui sont habituellement tracés au moyen d'une encre effaçable.An optical glass blank designated by the reference 4 in FIG. 2 carries, traced thereon, two orthogonal axes O 'and H' crossed at the optical center of the blank and which are usually traced by means of an erasable ink.

En se référant à la figure 3, les pupilles P d'un utilisateur portant une monture M sont espacées d'une distance dite écart pupillaire EP tandis que les centres géométriques des gabarits (ou des cercles des montures) sont espacés d'une distance EGM représentant l'écart géométrique de la monture qui, dans cet exemple, est un peu supérieur à la distance EP.Referring to FIG. 3, the pupils P of a user wearing a frame M are spaced by a distance called pupillary distance EP while the geometric centers of the templates (or circles of the frames) are spaced by a distance EGM representing the geometric deviation of the frame which, in this example, is slightly greater than the distance EP.

On comprend que dans les lunettes finies le centre de chaque verre optique, c'est-à-dire son centre optique doit être aussi proche que possible de la pupille de l'utilisateur. Il convient donc de positionner les verres sur les gabarits de façon à obtenir la position relative optimale du centre de l'ébauche par rapport aux pupilles et aux centres des gabarits.It is understood that in the finished glasses the center of each optical lens, that is to say its optical center must be as close as possible to the pupil of the user. It is therefore necessary to position the glasses on the templates so as to obtain the optimal relative position of the center of the blank relative to the pupils and to the centers of the templates.

Lorsque cette position est atteinte on pose un adaptateur sur le centre de rotation du verre qui correspond au centre géométrique du gabarit, de façon connue.When this position is reached, an adapter is placed on the center of rotation of the lens which corresponds to the geometric center of the template, in a known manner.

L'appareil suivant l'invention permet de réaliser ce centrage avec facilité et précision.The apparatus according to the invention allows this centering to be carried out with ease and precision.

Cet appareil représenté en perspective à la figure 4 comprend un support 5 comportant un clavier 6, l'ensemble ayant par exemple une forme similaire à celle d'une machine à écrire classique.This device shown in perspective in Figure 4 comprises a support 5 comprising a keyboard 6, the assembly having for example a shape similar to that of a conventional typewriter.

Le support 5 porte à sa partie supérieure un écran électronique plat 7 qui est par exemple un écran d'affichage du type à cristaux liquides.The support 5 carries at its upper part a flat electronic screen 7 which is for example a display screen of the liquid crystal type.

A l'opposé du clavier par rapport à l'écran 7 est monté un dispositif optique de visée qui sera décrit de façon plus détaillée dans la suite.Opposite the keyboard relative to the screen 7 is mounted an optical sighting device which will be described in more detail below.

Le support 5 contient un ensemble électronique constitué par un calculateur 8 relié à l'écran 7 de façon appropriée, une banque de donnée 9 ou autre système de mémoire approprié, et un dispositif de saisie de données 10. Cet ensemble électronique est rélié à une rectifieuse 11 à commande numérique.The support 5 contains an electronic assembly constituted by a computer 8 connected to the screen 7 in an appropriate manner, a data bank 9 or other appropriate memory system, and a data entry device 10. This electronic assembly is connected to a grinder 11 with numerical control.

Sur l'écran 7 est disposée une feuille 12 par exemple en matière plastique transparente ou enverre portant en son milieu deux axes orthogonaux X, Y qui sont gradués.On the screen 7 is arranged a sheet 12 for example of transparent plastic material or send carrying in its middle two orthogonal axes X, Y which are graduated.

En plus des touches habituelles 13 d'actionnement du calculateur 8, le clavier 6 comporte un dispositif de commande 14 qui, suivant l'exemple représenté, est constitué par des touches.In addition to the usual keys 13 for actuating the computer 8, the keyboard 6 includes a control device 14 which, according to the example shown, consists of keys.

Le dispositif monté à la partie arrière du support 5 comprend un montant vertical fixe 15 sur lequel est monté coulissant un corps allongé 16 sollicité vers le haut contre une butée 17 au moyen d'un ressort 18. Le corps 16 comporte à une extrémité un premier bras 19 s'étendant horizontalement et à son extrémité opposée un second bras 20 s'étendant également horizontalement mais décalé de 90°C par rapport au bras 19 et de même longueur.The device mounted on the rear part of the support 5 comprises a fixed vertical upright 15 on which is slidably mounted an elongated body 16 urged upwards against a stop 17 by means of a spring 18. The body 16 has at one end a first arm 19 extending horizontally and at its opposite end a second arm 20 also extending horizontally but offset by 90 ° C relative to arm 19 and of the same length.

Le bras 19 porte à son extrémité un dispositif optique 24, la longueur du bras étant adaptée pour que ce dispositif 24 puisse être amené à la verticale de l'intersection des axes X, Y de la feuille 12. Le bras 20 porte à son extrémité un support 21 adapté pour recevoir un adaptateur 22 constitué par exemple par une ventouse de façon amovible. Le corps 16 est monté rotatif sur l'axe 15 et peut être déplacé en hauteur par translation sur cet axe, au moyen d'un organe de commande 23.The arm 19 carries at its end an optical device 24, the length of the arm being adapted so that this device 24 can be brought to the vertical of the intersection of the axes X, Y of the sheet 12. The arm 20 carries at its end a support 21 adapted for receiving an adapter 22 constituted for example by a suction cup in a removable manner. The body 16 is rotatably mounted on the axis 15 and can be displaced in height by translation on this axis, by means of a control member 23.

Suivant le procédé de l'invention on fait apparaître sur l'écran 7 au moyen du calculateur 8 l'image en grandeur réelle d'une monture choisie dont les données sont en mémoire dans la banque 9.According to the process of the invention, the full-size image of a chosen frame whose data is stored in the bank 9 is displayed on the screen 7 by means of the computer 8.

Connaissant l'écart pupillaire de l'utilisateur (mesure au préalable) on déplace l'image de la monture suivant l'axe X de façon à l'amener exactement à cette valeur au moyen des touches de commande 14. On déplace ensuite l'image parallélement à l'axe Y de façon à régler la hauteur de la pupille de l'utilisateur par rapport au bas de la monture (ou de l'axe X). Le calculateur ayant en mémoire les données correspondant à la monture choisie enregistre au fur et à mesure les déplacements de la forme à partir de sa position de la position de saisie ou de stockage et calcule les différences par rapport aux données de la monture et restitue la forme de la monture centrée d'après la position pupillaire de l'utilisateur.Knowing the pupillary distance of the user (measurement beforehand), we move the image of the frame along the X axis so as to bring it exactly to this value by means of the control keys 14. We then move the image parallel to the Y axis so as to adjust the height of the user's pupil relative to the bottom of the frame (or the X axis). The computer having in memory the data corresponding to the chosen frame progressively records the displacements of the shape from its position from the entry or storage position and calculates the differences with respect to the data of the frame and restores the shape of the frame centered according to the pupil position of the user.

On pose ensuite l'ébauche du verre manuellement sur l'écran de façon que son centre optique coïncide avec l'intersection des axes X, Y et on vérifie au moyen du dispositif optique 24 qui permet d'observer l'image sans correction de parallaxe que l'image du cercle de monture (ou du gabarit) est bien contenu dans l'ébauche.The glass blank is then placed manually on the screen so that its optical center coincides with the intersection of the X, Y axes and is checked by means of the optical device 24 which makes it possible to observe the image without correction of parallax that the image of the mounting circle (or template) is indeed contained in the blank.

On fait alors tourner le corps 16 du dispositif de 90° pour amener l'adaptateur 22 en position au-dessus de l'ébauche et le poser sur celui-ci.The body 16 of the device is then rotated by 90 ° to bring the adapter 22 into position above the blank and place it thereon.

On répète bien entendu l'opération avec le second cercle de la monture, l'adaptateur étant ainsi pratiquement fixé sur l'axe optique du verre.The operation is of course repeated with the second circle of the frame, the adapter thus being practically fixed on the optical axis of the lens.

Le dispositif 10 de saisie contenu dans l'ensemble électronique de l'appareil peut être un dispositif tel que décrit dans FR-A-2 229 213 qui comporte un palpeur adapté pour suivre les contours d'un cercle de monture ou d'un gabarit et émettre des signaux qui peuvent être entrés directement dans le calculateur 8 à la place des données en mémoire dans la banque 9.The input device 10 contained in the electronic assembly of the device can be a device as described in FR-A-2 229 213 which includes a probe adapted to follow the contours of a frame circle or a template and transmit signals which can be entered directly into the computer 8 in place of the data stored in the bank 9.

Il ressort de ce qui précède que l'appareil suivant l'invention permet, à partir d'une forme de monture ou d'un gabarit choisi et en entrant dans le calculateur lié à l'écran les données morphologiques particulières d'un utilisateur, d'établir automatiquement les informations nécessaires à la commande d'une rectifieuse, et détermine également les caractéristiques du verre: diamètre maximum et rayons critiques pour l'achat de verres spéciaux (verres précalibrés).It appears from the above that the device according to the invention makes it possible, from a frame shape or a chosen template and by entering into the calculator linked to the screen, the particular morphological data of a user, automatically establish the information necessary to order a grinding machine, and also determines the characteristics of the glass: maximum diameter and critical radii for the purchase of special glasses (precalibrated glasses).

L'appareil peut également utiliser:

  • 1) les données électroniques d'un copieur de monture décrit dans FR-A-2 191 453 et FR-A-2 229 213.
  • 2) Les informations d'une ou pluisieurs banques de données intérieures ou extérieures au système, regroupant une ou plusieurs formes stockées.
  • 3) Les informations données sous forme de badges codés.
  • 4) Les informations d'un micro-ordinateur.
The device can also use:
  • 1) the electronic data of a mount copier described in FR-A-2 191 453 and FR-A-2 229 213.
  • 2) Information from one or more databases, internal or external to the system, grouping one or more stored forms.
  • 3) The information given in the form of coded badges.
  • 4) Information from a microcomputer.

D'une façon avantageuse tous déplacements de la monture ou gabarit sont lus sur l'écran et sont aussi visualisés par une lecture digitale précise.Advantageously all displacements of the frame or template are read on the screen and are also viewed by an accurate digital reading.

On comprend bien entendu que les dispositifs électroniques mentionnés ci-dessus sont tous classiques et ne nécessitent pas de description détaillée. Ils permettent bien entendu une liaison directe du calculateur 8 avec la rectifieuse 11 afin de commander celle-ci directement.It will of course be understood that the electronic devices mentioned above are all conventional and do not require a detailed description. They of course allow a direct connection of the computer 8 with the grinding machine 11 in order to control the latter directly.

On remarquera que l'appareil suivant l'invention permet de commander directement la rectifieuse en fonction des mesures effectuées en déplaçant l'image de la monture ou des gabarits sur l'écran 7 de l'appareil.It will be noted that the device according to the invention makes it possible to directly control the grinding machine as a function of the measurements carried out by moving the image of the frame or of the templates on the screen 7 of the device.

On comprend également que l'appareil suivant l'invention permet d'effectuer un centrage aux cotes particulières de l'utilisateur final de la monture et que si on le désire une imprimante peut être reliée au calculateur 8 afin d'imprimer toutes les cotes d'un verre donné, destinées au fabricant pour réaliser ce verre pour une monture donné et un client donné (verres pré-calibrés).It is also understood that the device according to the invention allows centering to be carried out at the particular dimensions of the end user of the frame and that, if desired, a printer can be connected to the computer 8 in order to print all the dimensions d '' a given lens, intended for the manufacturer to make this lens for a given frame and a given client (pre-calibrated lenses).

L'écran 7 utilisé ayant une définition de quelques dixièmes de millimètre, on obtient avec l'appareil suivant l'invention une précision tout a fait satisfaisante.The screen 7 used having a definition of a few tenths of a millimeter, we obtain with the apparatus according to the invention a completely satisfactory precision.

En variante, le calculateur peut être adapté pour faire apparaître les axes orthogonaux X, Y directement sur l'écran.As a variant, the computer can be adapted to display the orthogonal axes X, Y directly on the screen.

Claims (7)

  1. Apparatus for centring and fitting an adaptor on an optical glass blank and for automatically establishing the data needed to rectify the blank on a dressing machine, and adapted directly to control the latter, the said apparatus being of the type which comprises a memorised data bank, a computer (8) with a display screen (7) characterised in that it comprises a flat electronic display screen (7), on which a memorised image in the said bank of a spectacle frame or a given template is generated on a scale of 1 to 1, a device (14) for controlling movement on the said screen of an image relating to a frame or a given template, the electronic computer (8) recording the movements of the said image on the screen (7), memorising the differences of the final coordinates in relation to a reference position constituted by the intersection of two mutually perpendicular axes X, Y and calculating the data resulting therefrom and applying them directly to a dressing machine (11) and a mechanical pivoting device (16, 19, 20, 21, 24) for optically sighting and fitting an adaptor on the optical glass blank which is placed in the reference position.
  2. Apparatus according to Claim 1, characterised in that the said flat screen (7) is of the liquid crystal type.
  3. Apparatus according to Claim 2, characterised in that it comprises a sheet (12) of transparent material disposed on the said screen and comprising in its middle the said mutually perpendicular axes X, Y, the said axes being graduated.
  4. Apparatus according to any one of Claims 1 to 3, characterised in that the device for displaying and moving the image of the frame or of the template on the screen (7) is a programmable electronic computer (8).
  5. Apparatus according to Claim 4, characterised in that the device for recording the movements of the image on the screen (7) and for memorising the differences in its final coordinates in relation to the said reference position consists of the said computer (8).
  6. Apparatus according to Claim 1, characterised in that it comprises a support (5) on which is mounted the said flat screen (7) and a device (24) for fitting an adaptor, and in that the device for controlling displacement of the image on the said screen is a keyboard (6, 13, 14) the device for fitting the adaptor comprising optical sighting means (24) and fitting means (21) pivoting on the said support in opposition to the keyboard, in respect of the screen (7).
  7. Method of adjusting the position of an optical glass blank in relation to a template or a spectacle frame ring and for centring an adaptor on the centre of rotation of the blank, characterised in that with the help of apparatus according to one of Claims 1 to 6 the life-sized image of a spectacles frame or templates is caused to appear on a flat electronic display screen connected to an electronic computer, the image of a circle being brought into a reference position, this image is moved by a distance corresponding to the amount of pupillary separation relative to the user and the position of the image in terms of height is regulated as a function of the height of the pupil in relation to the bottom of the frame, the optical glass blank is placed on the screen to coincide with the reference position, whereupon it is possible to check that the image of the frame does not extend beyond the blank and an adaptor is fitted to the optical axis of the glass.
EP86401062A 1985-06-10 1986-05-20 Apparatus for centering and placing an adapter on a lens blank and for controlling a grinding machine Expired - Lifetime EP0206860B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401062T ATE37678T1 (en) 1985-06-10 1986-05-20 DEVICE FOR CENTERING AND PLACING AN ADAPTER ON A BLANK OF AN OPTICAL GLASS AND FOR CONTROLLING A GRINDING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8508723A FR2582975B1 (en) 1985-06-10 1985-06-10 APPARATUS FOR CENTERING AND POSITIONING AN ADAPTER ON AN OPTICAL GLASS BLANK AND FOR CONTROLLING A GRINDER
FR8508723 1985-06-10

Publications (3)

Publication Number Publication Date
EP0206860A1 EP0206860A1 (en) 1986-12-30
EP0206860B1 EP0206860B1 (en) 1988-10-05
EP0206860B2 true EP0206860B2 (en) 1996-12-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401062A Expired - Lifetime EP0206860B2 (en) 1985-06-10 1986-05-20 Apparatus for centering and placing an adapter on a lens blank and for controlling a grinding machine

Country Status (6)

Country Link
US (1) US4737918A (en)
EP (1) EP0206860B2 (en)
JP (1) JPH0611469B2 (en)
AT (1) ATE37678T1 (en)
DE (1) DE3660852D1 (en)
FR (1) FR2582975B1 (en)

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Also Published As

Publication number Publication date
FR2582975A1 (en) 1986-12-12
EP0206860A1 (en) 1986-12-30
JPS61284372A (en) 1986-12-15
US4737918A (en) 1988-04-12
ATE37678T1 (en) 1988-10-15
DE3660852D1 (en) 1988-11-10
JPH0611469B2 (en) 1994-02-16
FR2582975B1 (en) 1987-08-28
EP0206860B1 (en) 1988-10-05

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