EP1066919B1 - Finishing tool for optical surface, especially for optical lens - Google Patents

Finishing tool for optical surface, especially for optical lens Download PDF

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Publication number
EP1066919B1
EP1066919B1 EP00401626A EP00401626A EP1066919B1 EP 1066919 B1 EP1066919 B1 EP 1066919B1 EP 00401626 A EP00401626 A EP 00401626A EP 00401626 A EP00401626 A EP 00401626A EP 1066919 B1 EP1066919 B1 EP 1066919B1
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EP
European Patent Office
Prior art keywords
support
working member
tool according
smoothing tool
elastically deformable
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.)
Expired - Lifetime
Application number
EP00401626A
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German (de)
French (fr)
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EP1066919A1 (en
Inventor
Joel Bernard
Jean-Marc Padiou
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.)
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Publication of EP1066919A1 publication Critical patent/EP1066919A1/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
    • B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/18—Wheels of special form

Definitions

  • the present invention relates generally to tools of the type of those used for smoothing an optical surface.
  • smoothing is meant here, in the usual way, both the polishing as the smoothing of such a surface.
  • the tools used to ensure such smoothing comprise, on the one hand, a support, which is rigid, and, on the other hand, a member of work, which is integral with the previous support.
  • the present invention relates more particularly to the case where this organ is generally annular in shape and at least partially resilient deformable.
  • a smoothing tool comprising such a working member is located by example described in the German utility model No 298 03 158.
  • annular shape it is possible to give the organ of work of sufficient dimensions and rigidity to be able to generate the desired smoothing effect, while minimizing, by its recess central, its overall volume, and, therefore, the amount of material elastically deformable which is actually to be deformed.
  • the elastically deformable part of this organ of work advantageously allows it to adapt as well as possible to the surface to smooth while ensuring optimal balancing of contact pressure corresponding.
  • the present invention generally relates to a provision allowing better control of this working organ.
  • a smoothing tool for optical surface of the kind comprising, on the one hand, a support, which is rigid, and, on the other hand, a working member, which is annular in shape, and which is at less partially elastically deformable, this smoothing tool being of a generally characterized in that the support forms, in hollow, a annular housing, and in that the working member is attached to this support to the bottom of this annular housing, making however obviously protruding beyond the support.
  • the support implemented includes at its root the working organ, and it is thus even to maintain and guide this working organ, for the benefit working conditions of the latter.
  • this support facilitates obtaining a uniform distribution of the contact pressure between this working member and the worked optical surface.
  • the smoothing 10 comprises, overall, on the one hand, a support 11, which is rigid, and, on the other hand, a working member 12, which is integral with the support 11.
  • the support 11 is carried by a pin 13 suitable for allow rotational training.
  • the support 11 forms a part of revolution around this axis of rotation A.
  • the working member 12 is shaped general annular, having as its axis the axis of rotation A, and, according to arrangements described in more detail later, it is at least partly elastically deformable.
  • the support 11 forms, recessed, on its surface transverse 14 opposite spindle 13, that is to say on its free surface, a annular housing 15, and the working member 12 is attached to this support 11 in favor of the bottom 16 of this annular housing 15, making however obviously protruding beyond the support 11, that is to say beyond the surface transverse 14 thereof.
  • the annular housing 15 of the support 11 has as its axis the axis of rotation A.
  • the transverse surface 14 of the support 11 extends substantially perpendicular to this axis of rotation A.
  • annular housing 15 presented by the support 11 is delimited by two lateral surfaces 17, 18, one internal, the other external, which are coaxial, being both centered on the axis of rotation A, and which, in practice, are both generally cylindrical, extending both substantially perpendicular to the bottom 16.
  • the support 11 has, recessed, on at least one of the lateral surfaces 17, 18 of its annular housing 15, at least one groove unloading 19.
  • This discharge groove 19 extends in the middle zone of the lateral surfaces 17, 18, concerning more than half the height of these, and, in the embodiment shown, its bottom 20 is cylindrical, being centered on the axis of rotation A.
  • the working member 12 is itself delimited by lateral surfaces 21, 22 cylindrical, one internal, the other external, and it covers the entire bottom 16 of the annular housing 15 of the support 11.
  • D1 be the internal diameter of the working member 12, D2 its diameter external, and E1 its thickness.
  • this width E2 is greater than the thickness E1 of the member work 12, so that it remains on both sides of this working organ 12, at the outlet of the annular housing 15 of the support 11, a set J.
  • the working member 12 is in three parts.
  • This elastically deformable core 12A is for example in elastomer.
  • Its elasticity is chosen according to the deformation capacity desired and support effort to support in operation.
  • this elastically deformable core 12A is between 30 and 80 shore A degrees, preferably being included between 50 and 60 shore A degrees.
  • the elastically deformable core 12A extends beyond the support 11.
  • the working member 12 then comprises between its elastically deformable core 12A and its working surface 24, the latter being formed by its free surface opposite the bottom 16 of the annular housing 15, a surface layer 12B, which is itself elastically deformable, but whose elasticity is lower than that of elastically deformable core 12A above.
  • the layer of surface 12B is responsible for giving the assembly all the necessary rigidity to allow the desired smoothing.
  • this surface layer 12B is made of polyurethane.
  • the hardness of the surface layer 12B is at least equal to 50 shore A degrees.
  • it is between 80 and 90 shore A degrees.
  • the height of the surface layer 12B parallel to the axis of rotation A is adapted according to the flexibility desired.
  • the working member 12A comprises, finally, at its free end, an abrasive film 12C, which forms the work surface 24.
  • this 12C abrasive film is polyester, and it has grains abrasives with a grain size between 0.25 and 45 ⁇ m.
  • these abrasive grains can be provided by a carrier fluid, such as a liquid, gel or aerosol for example, and be dragged by a sheet of support, in fabric or foam for example, or by a grid, being by example flocked on this support sheet or on this grid.
  • a carrier fluid such as a liquid, gel or aerosol for example
  • the three constituent parts of the working member 12 that is to say the elastically deformable core 12A, the surface layer 12B, and the abrasive film 12C, are joined to each other by gluing, and, even, this working member 12 is itself secured by gluing to the support 11.
  • the dimensions of the working member 12 are chosen sufficiently large vis-à-vis those of the defects to be smoothed so that these do not influence the shape components to be respected for the surface optics worked, and small enough for the tool to adapt locally to the shape of the part, so that the gap between the deformations of the working surface 24 and the surface to be treated is as small as possible.
  • the elasticity of the surface layer 12B can vary from that from the elastically deformable core 12A to that of a metal.
  • this surface layer 12B is formed from a thin and flexible metallic film.
  • the surface layer 12B is purely and simply deleted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)
  • Surface Treatment Of Glass (AREA)
  • Surface Treatment Of Optical Elements (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The smoothing implement for optical lenses has a support (11) with an annular recess (15) to receive the smoothing tool (12) which is mounted by a smaller recess (16) in the floor of the main recess. The smoothing tool projects beyond the mounting. The implement has an elastic hub and projecting faces on the edges facing the smoothing tool to form an outlet orifice.

Description

La présente invention concerne d'une manière générale les outils du type de ceux mis en oeuvre pour le lissage d'une surface optique.The present invention relates generally to tools of the type of those used for smoothing an optical surface.

Par lissage, on entend, ici, de manière usuelle, aussi bien le polissage que le doucissage d'une telle surface.By smoothing is meant here, in the usual way, both the polishing as the smoothing of such a surface.

D'une manière générale, les outils mis en oeuvre pour assurer un tel lissage, et cela est le cas, notamment, pour les lentilles ophtalmiques, comportent, d'une part, un support, qui est rigide, et, d'autre part, un organe de travail, qui est solidaire du support précédent.In general, the tools used to ensure such smoothing, and this is the case, in particular, for ophthalmic lenses, comprise, on the one hand, a support, which is rigid, and, on the other hand, a member of work, which is integral with the previous support.

La présente invention vise plus particulièrement le cas où cet organe est de forme générale annulaire et où il est au moins en partie élastiquement déformable.The present invention relates more particularly to the case where this organ is generally annular in shape and at least partially resilient deformable.

Un outil de lissage comportant un tel organe de travail se trouve par exemple décrit dans le modèle d'utilité allemand No 298 03 158.A smoothing tool comprising such a working member is located by example described in the German utility model No 298 03 158.

Grâce à sa forme annulaire, il est possible de conférer à l'organe de travail des dimensions et une rigidité suffisantes pour qu'il soit à même de générer l'effet de lissage recherché, tout en minimisant, par son évidement central, son volume global, et, donc, la quantité de matière élastiquement déformable qui est effectivement à déformer.Thanks to its annular shape, it is possible to give the organ of work of sufficient dimensions and rigidity to be able to generate the desired smoothing effect, while minimizing, by its recess central, its overall volume, and, therefore, the amount of material elastically deformable which is actually to be deformed.

Le compromis ainsi trouvé est d'autant plus avantageux que, en pratique, la partie utile d'un tel organe de travail, c'est-à-dire la partie de cet organe de travail qui travaille le plus, en est la partie périphérique, lorsque, comme en l'espèce, cet organe de travail est, en service, l'objet d'un mouvement de rotation autour de son axe.The compromise thus found is all the more advantageous since, in practical, the useful part of such a working organ, that is to say the part of this the working organ that works the most, is the peripheral part, when, as in this case, this working organ is, in service, the object of a rotational movement around its axis.

Corollairement, la partie élastiquement déformable de cet organe de travail permet avantageusement à celui-ci de s'adapter au mieux à la surface à lisser tout en assurant un équilibrage optimal de la pression de contact correspondante.As a corollary, the elastically deformable part of this organ of work advantageously allows it to adapt as well as possible to the surface to smooth while ensuring optimal balancing of contact pressure corresponding.

La présente invention a d'une manière générale pour objet une disposition permettant un meilleur contrôle de cet organe de travail.The present invention generally relates to a provision allowing better control of this working organ.

De manière plus précise, elle a pour objet un outil de lissage pour surface optique du genre comportant, d'une part, un support, qui est rigide, et, d'autre part, un organe de travail, qui est de forme annulaire, et qui est au moins en partie élastiquement déformable, cet outil de lissage étant d'une manière générale caractérisé en ce que le support forme, en creux, un logement annulaire, et en ce que l'organe de travail est rapporté sur ce support à la faveur du fond de ce logement annulaire, en faisant cependant évidemment saillie au-delà du support.More specifically, it relates to a smoothing tool for optical surface of the kind comprising, on the one hand, a support, which is rigid, and, on the other hand, a working member, which is annular in shape, and which is at less partially elastically deformable, this smoothing tool being of a generally characterized in that the support forms, in hollow, a annular housing, and in that the working member is attached to this support to the bottom of this annular housing, making however obviously protruding beyond the support.

Autrement dit, par le logement annulaire qu'il comporte pour le recevoir, le support mis en oeuvre englobe à sa racine l'organe de travail, et il est ainsi à même d'assurer le maintien et le guidage de cet organe de travail, au bénéfice des conditions de travail de celui-ci.In other words, by the annular housing which it comprises to receive it, the support implemented includes at its root the working organ, and it is thus even to maintain and guide this working organ, for the benefit working conditions of the latter.

En outre, en canalisant le gonflement dont est inévitablement l'objet en service la partie élastiquement déformable de cet organe de travail, ce support facilite l'obtention d'une répartition uniforme de la pression de contact entre cet organe de travail et la surface optique travaillée.Furthermore, by channeling the swelling which is inevitably the object by service the elastically deformable part of this working member, this support facilitates obtaining a uniform distribution of the contact pressure between this working member and the worked optical surface.

Préférentiellement, pour satisfaire au mieux à ce gonflement, il est prévu, en creux, sur l'une au moins des surfaces latérales du logement annulaire du support suivant l'invention, au moins une gorge de déchargement.Preferably, to best satisfy this swelling, it is provided, recessed, on at least one of the lateral surfaces of the housing annular support according to the invention, at least one unloading groove.

Ainsi, un compromis avantageux est également trouvé entre, d'une part, le maintien et le guidage recherchés pour l'organe de travail, et, d'autre part, le volume de réception disponible pour la partie malgré tout déformée de celui-ci.Thus, an advantageous compromise is also found between, on the one hand, the maintenance and guidance sought for the working member, and, on the other hand, the reception volume available for the part, despite everything deformed thereof.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple, en référence au dessin annexé sur lequel la figure unique est une vue en coupe axiale d'un outil de lissage suivant l'invention.The characteristics and advantages of the invention will moreover emerge from the following description, by way of example, with reference to the accompanying drawing in which the single figure is an axial section view of a smoothing tool according to the invention.

Tel qu'illustré sur cette figure, et de manière connue en soi, l'outil de lissage 10 suivant l'invention comporte, globalement, d'une part, un support 11, qui est rigide, et, d'autre part, un organe de travail 12, qui est solidaire du support 11.As illustrated in this figure, and in a manner known per se, the smoothing 10 according to the invention comprises, overall, on the one hand, a support 11, which is rigid, and, on the other hand, a working member 12, which is integral with the support 11.

De manière connue en soi, également, et tel que schématisé en traits mixtes sur la figure, le support 11 est porté par une broche 13 propre à en permettre l'entraínement en rotation.In a manner known per se, also, and as shown schematically in lines mixed in the figure, the support 11 is carried by a pin 13 suitable for allow rotational training.

Soit A l'axe de rotation correspondant.Either to the corresponding axis of rotation.

En pratique, le support 11 forme une pièce de révolution autour de cet axe de rotation A.In practice, the support 11 forms a part of revolution around this axis of rotation A.

De manière connue en soi, enfin, l'organe de travail 12 est de forme générale annulaire, en ayant pour axe l'axe de rotation A, et, suivant des dispositions décrites plus en détail ultérieurement, il est au moins en partie élastiquement déformable.In a manner known per se, finally, the working member 12 is shaped general annular, having as its axis the axis of rotation A, and, according to arrangements described in more detail later, it is at least partly elastically deformable.

Suivant l'invention, le support 11 forme, en creux, sur sa surface transversale 14 opposée à la broche 13, c'est-à-dire sur sa surface libre, un logement annulaire 15, et l'organe de travail 12 est rapporté sur ce support 11 à la faveur du fond 16 de ce logement annulaire 15, en faisant cependant évidemment saillie au-delà du support 11, c'est-à-dire au-delà de la surface transversale 14 de celui-ci.According to the invention, the support 11 forms, recessed, on its surface transverse 14 opposite spindle 13, that is to say on its free surface, a annular housing 15, and the working member 12 is attached to this support 11 in favor of the bottom 16 of this annular housing 15, making however obviously protruding beyond the support 11, that is to say beyond the surface transverse 14 thereof.

En pratique, comme l'organe de travail 12, le logement annulaire 15 du support 11 a pour axe l'axe de rotation A.In practice, like the working member 12, the annular housing 15 of the support 11 has as its axis the axis of rotation A.

En pratique, également, la surface transversale 14 du support 11 s'étend sensiblement perpendiculairement à cet axe de rotation A.In practice, too, the transverse surface 14 of the support 11 extends substantially perpendicular to this axis of rotation A.

Outre le fond 16, le logement annulaire 15 que présente le support 11 est délimité par deux surfaces latérales 17, 18, l'une interne, l'autre externe, qui sont coaxiales, en étant l'une et l'autre axées sur l'axe de rotation A, et qui, en pratique, sont l'une et l'autre globalement cylindriques, en s'étendant l'une et l'autre sensiblement perpendiculairement au fond 16.In addition to the bottom 16, the annular housing 15 presented by the support 11 is delimited by two lateral surfaces 17, 18, one internal, the other external, which are coaxial, being both centered on the axis of rotation A, and which, in practice, are both generally cylindrical, extending both substantially perpendicular to the bottom 16.

Préférentiellement, et cela est le cas dans la forme de réalisation représentée, le support 11 comporte, en creux, sur l'une au moins des surfaces latérales 17, 18 de son logement annulaire 15, au moins une gorge de déchargement 19.Preferably, and this is the case in the embodiment shown, the support 11 has, recessed, on at least one of the lateral surfaces 17, 18 of its annular housing 15, at least one groove unloading 19.

Par exemple, et tel que représenté, il y a une gorge de déchargement 19, et une seule, sur chacune des surfaces latérales 17, 18 du logement annulaire 15 du support 11.For example, and as shown, there is an unloading groove 19, and only one, on each of the lateral surfaces 17, 18 of the housing ring 15 of support 11.

Cette gorge de déchargement 19 s'étend dans la zone médiane des surfaces latérales 17, 18, en concernant plus de la moitié de la hauteur de celles-ci, et, dans la forme de réalisation représentée, son fond 20 est cylindrique, en étant axé sur l'axe de rotation A.This discharge groove 19 extends in the middle zone of the lateral surfaces 17, 18, concerning more than half the height of these, and, in the embodiment shown, its bottom 20 is cylindrical, being centered on the axis of rotation A.

Dans la forme de réalisation représentée, l'organe de travail 12 est lui-même délimité par des surfaces latérales 21, 22 cylindriques, l'une interne, l'autre externe, et il couvre la totalité du fond 16 du logement annulaire 15 du support 11.In the embodiment shown, the working member 12 is itself delimited by lateral surfaces 21, 22 cylindrical, one internal, the other external, and it covers the entire bottom 16 of the annular housing 15 of the support 11.

Soit D1 le diamètre interne de l'organe de travail 12, D2 son diamètre externe, et E1 son épaisseur.Let D1 be the internal diameter of the working member 12, D2 its diameter external, and E1 its thickness.

Soit, corollairement, E2 la largeur du logement annulaire 15 du support 11 à son débouché à l'extérieur.As a corollary, E2 the width of the annular housing 15 of the support 11 at its outlet outside.

Préférentiellement, et cela est le cas dans la forme de réalisation représentée, cette largeur E2 est supérieure à l'épaisseur E1 de l'organe de travail 12, en sorte qu'il subsiste, de part et d'autre de cet organe de travail 12, au débouché du logement annulaire 15 du support 11, un jeu J.Preferably, and this is the case in the embodiment shown, this width E2 is greater than the thickness E1 of the member work 12, so that it remains on both sides of this working organ 12, at the outlet of the annular housing 15 of the support 11, a set J.

Dans la forme de réalisation représenté à titre d'exemple, qui concerne plus particulièrement le cas où la surface optique à travailler appartient à une pièce en matière minérale non représentée, l'organe de travail 12 est en trois parties. In the exemplary embodiment, which relates more particularly the case where the optical surface to be worked belongs to a piece of mineral material not shown, the working member 12 is in three parts.

Il comporte, tout d'abord, à compter du fond 16 du logement annulaire 15 du support 11, un noyau élastiquement déformable 12A.It comprises, first of all, from the bottom 16 of the annular housing 15 of the support 11, an elastically deformable core 12A.

Ce noyau élastiquement déformable 12A est par exemple en élastomère.This elastically deformable core 12A is for example in elastomer.

Son élasticité est choisie en fonction de la capacité de déformation souhaitée et de l'effort d'appui à soutenir en fonctionnement.Its elasticity is chosen according to the deformation capacity desired and support effort to support in operation.

Par exemple, la dureté de ce noyau élastiquement déformable 12A est comprise entre 30 et 80 degrés shore A, en étant de préférence comprise entre 50 et 60 degrés shore A.For example, the hardness of this elastically deformable core 12A is between 30 and 80 shore A degrees, preferably being included between 50 and 60 shore A degrees.

De préférence, et tel que représenté, le noyau élastiquement déformable 12A s'étend au-delà du support 11.Preferably, and as shown, the elastically deformable core 12A extends beyond the support 11.

Autrement dit, il fait saillie sur la surface transversale 14 de celui-ci.In other words, it projects on the transverse surface 14 thereof.

Dans la forme de réalisation représentée, l'organe de travail 12 comporte, ensuite, entre son noyau élastiquement déformable 12A et sa surface de travail 24, celle-ci étant formée par sa surface libre opposée au fond 16 du logement annulaire 15, une couche de surface 12B, qui est elle-même élastiquement déformable, mais dont l'élasticité est inférieure à celle du noyau élastiquement déformable 12A précédent.In the embodiment shown, the working member 12 then comprises between its elastically deformable core 12A and its working surface 24, the latter being formed by its free surface opposite the bottom 16 of the annular housing 15, a surface layer 12B, which is itself elastically deformable, but whose elasticity is lower than that of elastically deformable core 12A above.

Tandis que le noyau élastiquement déformable 12A a à charge d'encaisser les déformations de la surface optique travaillée, en permettant ainsi une adaptation de l'ensemble à cette surface optique, la couche de surface 12B a à charge de conférer à l'ensemble toute la rigidité nécessaire pour permettre le lissage recherché.While the elastically deformable core 12A has a charge absorb the deformations of the worked optical surface, allowing thus an adaptation of the assembly to this optical surface, the layer of surface 12B is responsible for giving the assembly all the necessary rigidity to allow the desired smoothing.

Par exemple, cette couche de surface 12B est en polyuréthanne.For example, this surface layer 12B is made of polyurethane.

Mais elle peut aussi être en élastomère, pourvu que cet élastomère soit moins déformable que celui constituant le noyau élastiquement déformable 12A.But it can also be made of elastomer, provided that this elastomer is less deformable than that constituting the elastically deformable core 12A.

Préférentiellement, la dureté de la couche de surface 12B est au moins égale à 50 degrés shore A.Preferably, the hardness of the surface layer 12B is at least equal to 50 shore A degrees.

Par exemple, elle est comprise entre 80 et 90 degrés shore A.For example, it is between 80 and 90 shore A degrees.

Préférentiellement, également, la hauteur de la couche de surface 12B parallèlement à l'axe de rotation A est adaptée en fonction de la flexibilité désirée.Preferably, also, the height of the surface layer 12B parallel to the axis of rotation A is adapted according to the flexibility desired.

Si nécessaire, il peut d'ailleurs être prévu une réalisation multicouche de cette couche de surface 12B, pour générer un gradient d'élasticité.If necessary, a multilayer realization of this surface layer 12B, to generate an elasticity gradient.

Dans la forme de réalisation représentée, l'organe de travail 12A comporte, enfin, à son extrémité libre, un film abrasif 12C, qui en forme la surface de travail 24. In the embodiment shown, the working member 12A comprises, finally, at its free end, an abrasive film 12C, which forms the work surface 24.

Par exemple, ce film abrasif 12C est en polyester, et il porte des grains abrasifs dont la granulométrie est comprise entre 0,25 et 45µm.For example, this 12C abrasive film is polyester, and it has grains abrasives with a grain size between 0.25 and 45 µm.

Mais, en variante, au lieu d'être agglomérés dans un tel film abrasif 12C, ces grains abrasifs peuvent être apportés par un fluide porteur, tel qu'un liquide, un gel ou aérosol par exemple, et être entraínés par un drap de support, en tissu ou en mousse par exemple, ou par une grille, en étant par exemple floqués sur ce drap de support ou sur cette grille.But, as a variant, instead of being agglomerated in such an abrasive film 12C, these abrasive grains can be provided by a carrier fluid, such as a liquid, gel or aerosol for example, and be dragged by a sheet of support, in fabric or foam for example, or by a grid, being by example flocked on this support sheet or on this grid.

Par exemple, les trois parties constitutives de l'organe de travail 12, c'est-à-dire le noyau élastiquement déformable 12A, la couche de surface 12B, et le film abrasif 12C, sont solidarisées les unes aux autres par collage, et, de même, cet organe de travail 12 est lui-même solidarisé par collage au support 11.For example, the three constituent parts of the working member 12, that is to say the elastically deformable core 12A, the surface layer 12B, and the abrasive film 12C, are joined to each other by gluing, and, even, this working member 12 is itself secured by gluing to the support 11.

Préférentiellement, les dimensions de l'organe de travail 12 sont choisies suffisamment grandes vis-à-vis de celles des défauts à lisser pour que ceux-ci n'influent pas sur les composantes de forme à respecter pour la surface optique travaillée, et suffisamment petites pour que l'outil s'adapte localement à la forme de la pièce, de façon à ce que l'écart entre les déformations de la surface de travail 24 et la surface à traiter soit aussi petit que possible.Preferably, the dimensions of the working member 12 are chosen sufficiently large vis-à-vis those of the defects to be smoothed so that these do not influence the shape components to be respected for the surface optics worked, and small enough for the tool to adapt locally to the shape of the part, so that the gap between the deformations of the working surface 24 and the surface to be treated is as small as possible.

A titre d'exemple, et sans qu'il puisse en résulter une quelconque limitation de la présente invention, il sera indiqué, ici, que, à cet égard, des résultats particulièrement satisfaisants ont été obtenus avec les valeurs dimensionnelles suivantes :

  • D1 compris entre 6 et 16 mm, en étant préférentiellement compris entre 6 et 10 mm,
  • D2 compris entre 10 et 20 mm, en étant préférentiellement compris entre 10 et 15 mm,
  • E1 compris entre 2 et 4 mm, en étant préférentiellement compris entre 2 et 3 mm.
By way of example, and without it being possible to result in any limitation of the present invention, it will be indicated here that, in this respect, particularly satisfactory results have been obtained with the following dimensional values:
  • D1 between 6 and 16 mm, preferably between 6 and 10 mm,
  • D2 between 10 and 20 mm, preferably between 10 and 15 mm,
  • E1 between 2 and 4 mm, preferably being between 2 and 3 mm.

En pratique, l'élasticité de la couche de surface 12B peut varier de celle du noyau élastiquement déformable 12A jusqu'à celle d'un métal.In practice, the elasticity of the surface layer 12B can vary from that from the elastically deformable core 12A to that of a metal.

Autrement dit, suivant une variante de réalisation non représentée, cette couche de surface 12B est formée d'un pellicule métallique, fine et flexible.In other words, according to a variant embodiment not shown, this surface layer 12B is formed from a thin and flexible metallic film.

Suivant une autre variante de réalisation également non représentée, qui convient plus particulièrement au cas où la surface optique travaillée appartient à une pièce en matière organique, la couche de surface 12B est purement et simplement supprimée. According to another alternative embodiment, also not shown, which more particularly suitable for the case where the worked optical surface belongs to a piece of organic material, the surface layer 12B is purely and simply deleted.

D'une manière plus générale, la présente invention ne se limite à la forme de réalisation plus particulièrement décrite et représentée, mais englobe toute variante d'exécution comme définie dans les revendications suivantes.More generally, the present invention is not limited to the embodiment more particularly described and represented, but encompasses any variant as defined in the following claims.

Claims (14)

  1. A tool for smoothing optical surfaces including a rigid support (11) and a generally annular working member (12) which is at least in part elastically deformable, characterized in that the support (11) forms a recessed annular housing (15) and in that the working member (12) is attached to said support (11) via the bottom (16) of said annular housing (15) but projects beyond the support (11).
  2. A smoothing tool according to claim 1 characterized in that the working member (12) has an elastically deformable core (12A) adjoining the bottom (16) of the annular housing (15) of the support (11).
  3. A smoothing tool according to claim 2 characterized in that the elastically deformable core (12A) of the working member (12) extends beyond the support (11).
  4. A smoothing tool according to claims 2 and 3 characterized in that the Shore A hardness of the elastically deformable core (12A) of the working member (12) is from 30 degrees to 80 degrees.
  5. A smoothing tool according to any of claims 2 to 4 characterized in that the working member (12) has a surface layer (12B) between its elastically deformable core (12A) and its working surface (24) which is itself elastically deformable but less elastic than the above elastically deformable core (12A).
  6. A smoothing tool according to claim 5 characterized in that the Shore A hardness of the surface layer (12B) of the working member (12) is at least 50 degrees.
  7. A smoothing tool according to claim 6 characterized in that the Shore A hardness of the surface layer (12B) of the working member (12) is from 80 degrees to 90 degrees.
  8. A smoothing tool according to claim 6 characterized in that the hardness of the surface layer (12B) of the working member (12) is that of a metal.
  9. A smoothing tool according to any of claims 1 to 8 characterized in that the working member (12) has an abrasive film (12C) at its free end which forms its working surface (24).
  10. A smoothing tool according to any of claims 1 to 9 characterized in that the inside diameter (D1) of the working member (12) is from 6 mm to 16 mm.
  11. A smoothing tool according to any of claims 1 to 10 characterized in that the outside diameter (D2) of the working member (12) is from 10 mm to 20 mm.
  12. A smoothing tool according to any of claims 1 to 11 characterized in that the thickness (E1) of the working member (12) is from 2 mm to 4 mm.
  13. A smoothing tool according to any of claims 1 to 12 characterized in that the support (11) has at least one relief groove (19) on at least one lateral surface (17, 18) of its annular housing (15).
  14. A smoothing tool according to claim 13 characterized in that it includes a relief groove (19) on each lateral surface (17, 18) of the annular housing (15) of the support (11).
EP00401626A 1999-07-02 2000-06-08 Finishing tool for optical surface, especially for optical lens Expired - Lifetime EP1066919B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9908564A FR2795667B1 (en) 1999-07-02 1999-07-02 SMOOTHING TOOL FOR OPTICAL SURFACE, PARTICULARLY FOR OPHTHALMIC LENS
FR9908564 1999-07-02

Publications (2)

Publication Number Publication Date
EP1066919A1 EP1066919A1 (en) 2001-01-10
EP1066919B1 true EP1066919B1 (en) 2002-10-30

Family

ID=9547650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00401626A Expired - Lifetime EP1066919B1 (en) 1999-07-02 2000-06-08 Finishing tool for optical surface, especially for optical lens

Country Status (6)

Country Link
US (1) US6514133B1 (en)
EP (1) EP1066919B1 (en)
JP (1) JP2001054847A (en)
AT (1) ATE226866T1 (en)
DE (1) DE60000673T2 (en)
FR (1) FR2795667B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002337052A (en) * 2001-05-16 2002-11-26 Olympus Optical Co Ltd Polisher and polishing method using polisher
DE102016119746B4 (en) 2016-10-17 2024-02-08 Matuschek Meßtechnik GmbH grinding wheel

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US1970835A (en) * 1930-10-02 1934-08-21 Carborundum Co Abrasive article and method of making the same
US2110619A (en) * 1936-01-04 1938-03-08 Norton Co Grinding wheel mounting
US2065941A (en) * 1936-03-21 1936-12-29 Norton Co Mounted grinding wheel
US2065942A (en) * 1936-03-21 1936-12-29 Norton Co Grinding wheel
US2235446A (en) * 1939-07-10 1941-03-18 Milton H Birger Surfacing means
US2716312A (en) * 1953-03-09 1955-08-30 Elmer W Speicher Truing device for face-type diamond abrasive wheels
US3034625A (en) * 1958-01-29 1962-05-15 Demag Zug Gmbh Axially displaceable coupling, brake and like friction means
IN155783B (en) * 1980-04-02 1985-03-09 De Beers Ind Diamond
JPS58196061A (en) * 1982-05-10 1983-11-15 Sharp Corp Electrode formation for thin film semiconductor device
JPH0710502B2 (en) * 1986-03-20 1995-02-08 大見工業株式会社 Rotary peeling tool
JPH01171749A (en) * 1987-12-23 1989-07-06 Olympus Optical Co Ltd Washing method for lens face
JPH03221362A (en) * 1990-01-19 1991-09-30 Matsushita Electric Ind Co Ltd Toric face polishing device
JPH068147A (en) * 1992-06-29 1994-01-18 Tohoku Kako Kk Support method for elastic grinding wheel, and grinding wheel support
DE4328987C1 (en) * 1993-08-28 1995-02-16 Thielenhaus Ernst Kg Use of a grinding device for fine grinding motor vehicle brakes
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Also Published As

Publication number Publication date
DE60000673T2 (en) 2003-07-03
EP1066919A1 (en) 2001-01-10
DE60000673D1 (en) 2002-12-05
FR2795667A1 (en) 2001-01-05
ATE226866T1 (en) 2002-11-15
FR2795667B1 (en) 2001-10-12
US6514133B1 (en) 2003-02-04
JP2001054847A (en) 2001-02-27

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