EP1711311B2 - Dispositif et procede pour polir une surface optique et procede pour realiser un outil de polissage - Google Patents

Dispositif et procede pour polir une surface optique et procede pour realiser un outil de polissage Download PDF

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Publication number
EP1711311B2
EP1711311B2 EP05700889A EP05700889A EP1711311B2 EP 1711311 B2 EP1711311 B2 EP 1711311B2 EP 05700889 A EP05700889 A EP 05700889A EP 05700889 A EP05700889 A EP 05700889A EP 1711311 B2 EP1711311 B2 EP 1711311B2
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Prior art keywords
polishing
polishing tool
outer contour
axis
axial thickness
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German (de)
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EP1711311A1 (fr
EP1711311B1 (fr
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Christoph Kuebler
Hexin Wang
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Carl Zeiss Vision International GmbH
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Carl Zeiss Vision International GmbH
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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
    • B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/142—Wheels of special form

Definitions

  • the invention relates to a device for polishing an optical surface, comprising a polishing head, the polishing tool along a common axis one behind the other, a first, preferably rigid body, a second, elastic body and a polishing pad, each extending substantially radially to the axis , according to the preamble of claim 1 or claim 2.
  • the invention further relates to a method of polishing an optical surface.
  • the invention relates to a method for producing a polishing tool which has, along a common axis, one after the other a first, preferably rigid body, a second, elastic body and a polishing pad which extend in each case substantially radially to the axis.
  • optical surfaces all such surfaces of optical components are meant as e.g. Surfaces, in particular aspheric surfaces or free-form surfaces, of spectacle lenses, mirrors, plastic optics, etc.
  • Eyeglass lenses are usually made from a blank by machining the so-called prescription surface or surfaces. This is the optically relevant design of the lens fixed. Finally, the lens is still polished, which, however, no significant change in the optical properties may be more effected.
  • a polishing head For polishing a surface of a spectacle lens, a polishing head is usually used which has a polishing tool whose polishing surface is at least approximately adapted to the shape of the surface of the spectacle lens to be polished.
  • the polishing tool and / or the spectacle lens are hinged, in particular with a ball joint, mounted and are guided relative to each other with a predetermined movement, usually with the help of multi-axis robots.
  • polishing spherical or toric spectacle lenses it is less problematic due to the relatively simple shape of the surface to be polished to find a suitable, complementary formed polishing tool that can be performed with simple movements over the surface and there causes no undue deformation. Due to the large number of possible spherical or toric spectacle lenses, it is only necessary to have a corresponding large number of polishing tools available.
  • a polishing body is used, which is rigid in use, but before, for example, by heating, is displaceable in a plastic state, so that he can first adapt to any surface in this plastic state before it solidifies.
  • polishing tools have in common that they are rigid in use and therefore can only be used for polishing regularly shaped surfaces.
  • a polishing body which may be deformable during use. This deformability is achieved by a bundle of parallel metallic rods, which are mounted at one end on an elastic membrane and individually displaceable. The total area formed by its end face at the other end adapts to the shape of the surface to be polished.
  • polishing tools like every membrane has a course of elasticity in which the center is the softest point and the elasticity decreases radially outward, ie the membrane becomes stiffer or the spring characteristic becomes steeper. This is, as stated in the present invention, disadvantageous for polishing tools of the type of interest here, because this elasticity profile causes larger shape errors. Furthermore, it is disadvantageous in these polishing tools that the movement of the rods is associated with mechanical friction, so that hardly any dynamic polishing processes can be realized.
  • a body of elastic material is disposed between a rigid support body and the polishing pad in the polishing tool.
  • the axial thickness of the elastic body in the known polishing tools is constant and the material of the elastic body is homogeneous.
  • the elasticity in the radial direction is constant.
  • polishing aspherical or punctiform asymmetric free-form surfaces can not be used without problems.
  • Such free-form surfaces have also been polished by means of numerically controlled polishing machines or polishing robots.
  • polishing machines usually the polishing tool is CNC-guided over the surface of the spectacle lens to be polished.
  • the polishing head drives the polishing tool usually rotationally and presses it simultaneously against the surface to be polished.
  • Aspherical or point-symmetric free-form surfaces have curvatures that change over the surface.
  • the polishing tool moves during polishing at least over part of this irregularly curved surface. It must therefore be able to adapt with its elasticity to the respective local curvature, specifically in such a way that the polishing pressure is as constant as possible over the contact surface. Only then does a predeterminable, constant removal result, and the polished surface becomes optimally smooth. If this can not be ensured and the polishing pressure fluctuates across the contact surface, the desired aspheric surface topography is deformed and thus degraded in optical quality. Such deformations occur with known polishing tools in conventional production processes and therefore have to be compensated step by step, with iterative reworking methods. However, this is time consuming and expensive.
  • the general state of the art in the field of polishing tools is the DE 296 08 954 U1 to mention.
  • This document describes an adaptable grinding head for clamping in rotating tools.
  • the grinding head has a body coated with abrasive material, which consists of a soft, extremely yielding material, such as foam rubber.
  • the grinding head is mushroom-shaped, cone-shaped or spherical in axial section, so that it is thinner in the edge region than in the middle. This makes it harder in the edge area.
  • a similar grinding head is also in the US 3,043,065 disclosed. This known grinding head is mushroom-shaped and therefore also harder in the edge region than in the middle.
  • JP 61-103768 A another grinding head of also mushroom-shaped.
  • This grinding head is divided into three concentric areas, which consist of the same material, but in which air bubbles are embedded in different concentrations.
  • the central area contains the largest density of air bubbles, so that the effective surface is the smallest. It is the largest at the edge.
  • the invention is therefore the object of developing a device and a method of the type mentioned in such a way that these disadvantages are avoided.
  • this object is achieved in that a device of the aforementioned type is used.
  • this object is achieved according to claim 17 or 18.
  • the invention provides an incredibly simple polishing tool, which is similar to polishing tools known from its structure, but due to its design, it is also able to grind irregularly curved free-form surfaces on spectacle lenses without an irregular removal occurring during polishing, in contrast to conventional polishing tools.
  • This is achieved by a targeted influencing the elasticity of the polishing pad-bearing elastic body in the radial direction by the elastic body is softer in the radial direction from the inside to the outside, thus having an increasingly flatter spring characteristic.
  • the second body is preferably softer in the radial outward direction.
  • This measure has the advantage that the contact pressure is transmitted particularly evenly to the surface to be polished.
  • the second body has an increasing axial thickness in the radial direction.
  • This measure has the advantage that the desired radial stiffness profile can be set almost arbitrarily if the radial profile of the axial thickness is set accordingly. In this way the tool can be very sensitively optimized.
  • the second body abuts with an inner contour of the first body and with an outer contour of the polishing pad, wherein the profile of the axial thickness over the radial direction is determined in dependence on the radial shape of the contours.
  • This measure has the advantage that an optimization with two contours is possible, so that the outer contour can be adapted particularly well to the surface to be polished, and essentially the inner contour can be used to set the desired radial profile.
  • the inner contour is concave and the outer contour is concave, or the inner contour is convex and the outer contour is concave.
  • the outer contour is spherical or aspherical or formed as a freeform surface.
  • the second body is made of a material whose elastic modulus is greater than 0.02 N / mm 2 .
  • material for the second body is preferred if it is selected from the group of rubber, rubber, polyurethane, polyetherurethane, elastomer.
  • a particularly economical production is possible if the second body is a casting.
  • a further embodiment of the invention is characterized in that the second body is formed of a material whose elasticity in the radial direction increases from the inside to the outside, i. the compression spring characteristic becomes increasingly flatter from the inside to the outside.
  • This measure has the advantage that one is free in the shape of the second body within wide limits. It is therefore possible to form the second body with a constant thickness, ie circular disk-shaped, but nevertheless has the desired radial profile of the elasticity due to the special, inhomogeneous nature of the material, in which the second body is softer radially on the outside than inside.
  • polishing pad any entity that can represent a polishing surface.
  • the polishing pad may merely be a polishing paste, or it may be physically formed as a polishing membrane, polishing pad or polishing layer material.
  • the present invention preferably relates to the polishing of surfaces of spectacle lenses or mirrors or aspherical mirrors or aspheric optical surfaces.
  • the polishing tool may be according to embodiments of the invention either to the axis round or non-circular. It may also be articulated either in the axle or off-axis.
  • the second body is produced in the radial direction with increasing axial thickness, wherein the second body with an inner contour to the first body and with an outer contour of the Polierbelag_angrenzend made and the course of the axial thickness over the Radial direction is determined depending on the radial shape of the contours.
  • Fig. 1 10 denotes a device for polishing a spectacle lens 12.
  • spectacle lens is to be understood only as an example because the invention can be used quite generally in optical surfaces. This means surfaces of optical components, such as surfaces, in particular aspherical surfaces or free-form surfaces of spectacle lenses, mirrors, plastic optics, etc.
  • FIG. 1 the spectacle lens 12 is held by a conventional holder 14, in the example shown spatially fixed.
  • a first axis is designated 15. This is at the same time the geometric axis of the body of the spectacle lens 12 and the vertical axis of the holder 14.
  • the spectacle lens has an inner rear surface 16 and an outer front surface 18.
  • the inner surface 16 is the so-called prescription surface, which is optically processed in a predetermined manner and, in particular, is designed as a free-form surface.
  • a polishing head 20 carries at its free end a polishing tool 22.
  • the polishing tool 22 has a first, preferably rigid body 24 in the form of a shell. This is followed flush with a second, elastic body 26, which is also referred to as a buffer.
  • a polishing pad 28 On its opposite side, in turn, there is a polishing pad 28.
  • the polishing pad 28 may consist only of an applied polishing paste or may be its own physical entity, e.g. a polishing membrane, a polishing pad or a polishing layer material.
  • the first body 24 is provided on its rear side with a ball socket 30 or other suitable hinge part into which engages a ball head 32 of a symbolized actuator 34 of a polishing robot (not shown) which extends along a second axis 36.
  • the thus indicated joint allows pivoting movements of the polishing tool 22 relative to the spectacle lens, but at the same time makes it possible to rotate the polishing tool 22 about the second axis 36. This makes it possible to drive the polishing tool 22 and to guide it with the polishing pad 28 over the surface 16 of the spectacle lens 12 to be polished, as is known to the person skilled in the art.
  • the second elastic body 26 is preferably made of rubber or rubber. It can also consist of a polyurethane material, eg polyurethane, polyether urethane or an elastomer. Such materials are known and available, for example, under the trade names Sylomer, Sylodyn and Sylodamp from Getzner.
  • the elastic modulus E of this material should be greater than 0.02 N / mm 2 .
  • the elements 24, 26 and 28 sit in the direction of the second axis 36 close to each other and extend substantially in the radial direction. As will be explained, in the context of the present invention a distinction is made between round and non-round polishing tools 22.
  • the second axis 36 need not necessarily be located in the center of the polishing tool 22.
  • the present invention also includes other embodiments in eccentric or tumbling construction.
  • the polishing tool 22 is again shown schematically with the three elements 24, 26 and 28. It is important in this embodiment that the second body 26 has an axial thickness D which varies with the distance from the axis 36. This is therefore provided because the elasticity of the second body 26 in the radial direction from the inside to the outside in a predetermined manner, ie with a predetermined profile to increase. This means that the second, elastic body is softened towards the outside, thus has an increasingly flatter spring characteristic.
  • an elastic plate material a spring characteristic, ie a Depending on the compression (N / mm 2 ) of the deflection (mm), the flatter, the thicker the plate material is.
  • the applied polishing pressure corresponds to the pressure.
  • the already mentioned axial thickness D is measured between the contours 40 and 42.
  • the desired increasing elasticity towards the edge of the polishing tool can alternatively also be achieved by the use of a material for the second body whose elasticity is not homogeneous but increases towards the outside. One is then largely free in the course of the axial thickness as a function of the radial distance from the axis.
  • the radial increase in elasticity towards the edge of the polishing tool can be adjusted continuously or in steps.
  • the direction of the second axis 36 is denoted by z.
  • the radial distance from the second axis is one-dimensional in round polishing tools 22, ie h. In the case of non-round polishing tools 22, it is two-dimensional, ie it is expressed in coordinates x, y.
  • Fig. 2 further shows that the second body 26 is bounded on its upper side by an inner contour 40 and on its lower side by an outer contour 42.
  • the outer contour 42 is substantially equal to the envelope of the contour of the surface 16 to be polished Fig. 2 the inner contour 40 is concave and the outer contour 42 is convex.
  • FIGS. 3 to 6 show variants of Fig. 2 , wherein like elements are given the same reference numerals and differentiated only by adding a letter.
  • the inner contour 40b and the outer contour 42b are concave.
  • the polishing tool 22 is pressed with a pressing force Fk to the surface 16 of the spectacle lens 12 to be polished.
  • Fk a pressing force
  • an optimization process is performed, which is shown in the block diagram of Fig. 7 is illustrated.
  • a first step (block 50), the desired mean polishing pressure pm or the surface pressure in N / mm 2 is set.
  • the necessary contact force Fk in N is determined from the dimensions of the polishing tool 22, that is to say from the size of the contact surface.
  • a third step (block 54), the elasticity modulus E of the material for the second body 26 is selected in N / mm 2 and its center thickness Di determined.
  • a fourth step (block 56), the outer contour 42 of the second body 26 is determined on the surface 16, starting from a basic position of the polishing tool 22.
  • a sixth step (block 60), the polishing movement of the polishing tool 22 on the surface 16 to be polished is determined.
  • this polishing movement is discretized in a sufficiently large number n of small movement increments.
  • an eighth step (block 64), the deviations in the z-direction z_D (h) and z_D (x, y), respectively, between the outer contour 42 of the second body 26 which is displaced and / or twisted with respect to the surface 16 to be polished are positioned at one position i calculated. This is the local jounce surface.
  • a ninth step (block 66), these deviations z_D (h) and z D (x, y) are added at all motion incremental intermediate positions. This happens component by component in the respective polar or Cartesian system.
  • a tenth step (block 68) the minimum deflection depth z_Dmin is recorded and, accordingly, in an eleventh step (block 69), the maximum deflection depth z_Dmax.
  • the required iterations take place via the loops 74, 78 and 80.
  • Variant A thus completely compensates the mean dynamic spring deviation and reduces the dynamic spring pressure deviation by the function of the thickness D of the second body 26.
  • the factor f_a is used as a special factor assigned to the aspheric type.
  • the factor can ideally be between 1/2 and 2.
  • the dynamic spring pressure variations are not compensated in this variant.
  • the design of the second body 26 is carried out for the processing of a toric aspherical surface of a spectacle lens according to variant B.
  • a base radius RB of 150 mm with a refractive index of 1.6 means a refractive index of 4 diopters.
  • a cylinder radius RZ of 100 mm means a refractive index of 6 diopters for the same refractive index.
  • Such an aspheric toric surface thus represents a cylindrical refractive power of 2 diopters.
  • Over 90% of all spectacle lenses have a cylinder effect of less than 2 diopters.
  • the asphericity of the described torus is in the diameter range of 45 mm at about 900 microns.
  • the center thickness Di of the second body 26 is 4 mm.
  • the polishing tool 22 is pressed in a conventional manner, assuming a constant thickness D of the second body 26 of 4 mm against the aforementioned surface with the radii 100/150 mm.
  • the radii of contours 40 and 42 are identical and chosen to be between the two radii of the torus. It then shows that the polishing pressure fluctuations in the outer area amount to at least 96% of the averaged polishing pressure. This causes a strong discontinuous polishing erosion and is counterproductive for a uniform polishing and smoothing effect. It is to be expected a strongly fluctuating polishing process.
  • the radii of the contours 40 and 42 are calculated so that the outer contour 42 presses somewhat shallower than the base radius RB and the radius of the inner contour 40 correspondingly compensates for the difference in thickness from the inside to the outside.
  • the now calculated polishing pressure then returns in its dynamics to less than 40% of the average polishing pressure pm.

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

Claims (18)

  1. Dispositif pour le polissage d'une surface optique, avec une tête de polissage (20), dont l'outil de polissage (22) présente le long d'un axe (36) commun de façon successive un premier corps (24), de préférence rigide, un second corps (26) élastique et un revêtement de polissage (28), qui s'étendent à chaque fois essentiellement radialement à l'axe (36), le second corps (26) étant formé de plus en plus souple de l'intérieur vers l'extérieur dans le sens radial (h ; x, y), le second corps (26) étant formé avec une épaisseur (D) axiale croissante dans le sens radial (h ; x, y), le second corps (26) étant formé de façon contiguë par un contour (40) intérieur au premier corps (24) et par un contour (42) extérieur au revêtement de polissage (28) et le tracé de l'épaisseur (D) axiale étant déterminé sur la direction (h ; x, y) radiale en fonction du tracé radial des contours (40, 42), caractérisé en ce que le contour (40b) intérieur et le contour (42b) extérieur sont de forme concave.
  2. Dispositif pour le polissage d'une surface optique, avec une tête de polissage (20), dont l'outil de polissage (22) présente le long d'un axe (36) commun de façon successive un premier corps (24), de préférence rigide, un second corps (26) élastique et un revêtement de polissage (28), qui s'étendent à chaque fois essentiellement radialement à l'axe (36), le second corps (26) étant formé de plus en plus souple de l'intérieur vers l'extérieur dans le sens radial (h ; x, y), le second corps (26) étant formé avec une épaisseur (D) axiale croissante dans le sens radial (h ; x, y), le second corps (26) étant formé de façon contiguë par un contour (40) intérieur au premier corps (24) et par un contour (42) extérieur au revêtement de polissage (28) et le tracé de l'épaisseur (D) axiale étant déterminé sur la direction (h ; x, y) radiale en fonction du tracé radial des contours (40, 42), caractérisé en ce que le contour (40d) intérieur est de forme convexe et le contour (42b) extérieur est de forme concave.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le contour (42) extérieur est de forme sphérique.
  4. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le contour (42) extérieur est de forme asphérique.
  5. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le contour (42) extérieur en forme de surface à forme libre.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le second corps (26) est à base d'un matériau dont le module d'élasticité (E) est supérieur à 0,02 N/mm2.
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le second corps (26) est à base d'un matériau qui est choix parmi le groupe caoutchouc, polyuréthane, polyétheruréhane, élastomère.
  8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le second corps (26) est une pièce moulée.
  9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le second corps (26) est conçu à base d'un matériau dont l'élasticité augmente dans le sens radial de l'intérieur vers l'extérieur.
  10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le revêtement de polissage (28) est une pâte de polissage.
  11. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le revêtement de polissage (28) est conçu comme une membrane de polissage.
  12. Dispositif selon l'une quelconque des revendications 1 à 11, caractérisé en ce que l'outil de polissage (22) est conçu rond par rapport à l'axe (36).
  13. Dispositif selon l'une quelconque des revendications 1 à 11, caractérisé en ce que l'outil de polissage (22) est conçu ovale par rapport à l'axe (36).
  14. Dispositif selon l'une quelconque des revendications 1 à 13, caractérisé en ce que l'outil de polissage (22) est logé de façon articulée dans l'axe (36).
  15. Dispositif selon l'une quelconque des revendications 1 à 13, caractérisé en ce que l'outil de polissage (22) est logé de façon articulée à l'extérieur de l'axe (36).
  16. Procédé pour le polissage d'une surface (16) d'un composant optique, en particulier d'un verre de lunettes (12), caractérisé en ce qu'un dispositif est utilisé selon l'une quelconque des revendications 1 à 15.
  17. Procédé pour fabriquer un outil de polissage (20), qui présente le long d'un axe (36) commun de façon successive un premier corps (24), de préférence rigide, un second corps (26) élastique ainsi qu'un revêtement de polissage (28), qui s'étendent à chaque fois sensiblement radialement à l'axe (36), le second corps (26) étant conçu de plus en plus souple de l'intérieur vers l'extérieur dans le sens radial (h ; x, y), le second corps (26) présentant une épaisseur (D) axiale croissante dans le sens radial (h ; x, y), le second corps (26) étant contigu par un contour (40) intérieur au premier corps (24) et par un contour (42) extérieur au revêtement de polissage (28), et le tracé de l'épaisseur (D) axiale étant déterminé sur la direction (h ; x, y) radiale en fonction du tracé radial des contours (40, 42), caractérisé par les étapes suivantes :
    a) Fixation d'une pression de polissage (pm) moyenne souhaitée de l'outil de polissage (20) ;
    b) Détermination de la force de pression (Fk) nécessaire à partir de la surface de polissage de l'outil de polissage (20),
    c) Sélection d'un module d'élasticité (E) pour le matériau du second corps (26) ;
    d) Sélection d'une épaisseur moyenne (Di) du second corps (26) ;
    e) Sélection d'un contour (42) extérieur initial ;
    f) Calcul d'une profondeur moyenne de compression de ressort (di) pour un second corps (26) avec l'hypothèse que le second corps présente une épaisseur (D) axiale constante qui est égale à l'épaisseur moyenne (Di) sélectionnée ;
    g) Détermination d'un mouvement de polissage de l'outil de polissage (20) sur la surface (16) à polir ;
    h) Discrétisation du mouvement de polissage en un nombre (n) prédéfini d'incréments de mouvement, le nombre (n) étant choisi suffisamment grand ;
    i) Calcul d'une surface de compression de ressort à partir des écarts de l'épaisseur (z_Di) axiale dans le sens (z) de l'axe (36) entre la surface (16) et le contour (42) extérieur en un point (i) prédéfini avec un mouvement de polissage relatif entre l'outil de polissage (20) et la surface optique et ;
    j) Addition des écarts (z_Di) sur tous les points (i) ;
    k) Détermination d'un écart maximum (z_Dmax) ;
    l) Détermination d'un écart minimal (z Dmin) ;
    m) Détermination d'une valeur moyenne (z_Dm) à partir de tous les écarts (z_Di) ;
    n) Formation d'une différence (z_Dmt) entre la valeur moyenne (z_Dm) et la somme d'un basculement et d'une déviation centrale de la valeur moyenne (z_Dm) ;
    o) Calcul de l'épaisseur (D) axiale en fonction de la direction (h) radiale pour des outils de polissage ronds respectivement (x, y) pour des outils de polissage ovales (22) avec les sous-étapes suivantes : K ⁢ 2 h = K ⁢ 2 h + z_Dmt h ;
    Figure imgb0044
    ou K ⁢ 2 x y = K ⁢ 2 x y + z_Dmt x y ;
    Figure imgb0045
     D h = Di + Di * z_Dmax h - z_Dmin h / di / f_a ;
    Figure imgb0046
    ou D x y = Di + Di * z_Dmax x y - z_Dmin x y / di / f_a ;
    Figure imgb0047
     K ⁢ 1 h = K ⁢ 2 h + D h ;
    Figure imgb0048
    ou K ⁢ 1 x y = K ⁢ 2 x y + D x y .
    Figure imgb0049
  18. Procédé pour fabriquer un outil de polissage (20), qui présente le long d'un axe (36) commun de façon successive un premier corps (24), de préférence rigide, un second corps (26) élastique ainsi qu'un revêtement de polissage (28), qui s'étendent à chaque fois sensiblement radialement à l'axe (36), le second corps (26) étant conçu de plus en plus souple de l'intérieur vers l'extérieur dans le sens radial (h ; x, y), le second corps (26) présentant une épaisseur (D) axiale croissante dans le sens radial (h ; x, y), le second corps (26) étant contigu par un contour (40) intérieur au premier corps (24) et par un contour (42) extérieur au revêtement de polissage (28), et le tracé de l'épaisseur (D) axiale étant déterminé sur la direction (h ; x, y) radiale en fonction du tracé radial des contours (40, 42), caractérisé par les étapes suivantes :
    a) Fixation d'une pression de polissage (pm) moyenne souhaitée de l'outil de polissage (20) ;
    b) Détermination de la force de pression (Fk) nécessaire à partir de la surface de polissage de l'outil de polissage (20),
    c) Sélection d'un module d'élasticité (E) pour le matériau du second corps (26) ;
    d) Sélection d'une épaisseur moyenne (Di) du second corps (26) ;
    e) Sélection d'un contour (42) extérieur initial ;
    f) Calcul d'une profondeur moyenne de compression du ressort (di) pour un second corps (26) avec l'hypothèse que le second corps présente une épaisseur (D) axiale constante qui est égale à l'épaisseur moyenne (Di) sélectionnée ;
    g) Détermination d'un mouvement de polissage de l'outil de polissage (20) sur la surface (16) à polir ;
    h) Discrétisation du mouvement de polissage en un nombre (n) prédéfini d'incréments de mouvement, le nombre (n) étant choisi suffisamment grand ;
    i) Calcul d'une surface de compression du ressort à partir des écarts de l'épaisseur (z_Di) en direction (z) de l'axe (36) entre la surface (16) et le contour (42) extérieur en un point (i) prédéfini dans le cas d'un mouvement de polissage relatif entre l'outil de polissage (20) et la surface optique ;
    j) Addition des écarts (z_Di) sur tous les points (i) ;
    k) Détermination d'un écart maximum (z_Dmax) ;
    l) Détermination d'un écart minimum (z_Dmin) ;
    m) Détermination d'une valeur moyenne (z_Dm) à partir de tous les écarts (z_Di) ;
    n) Formation d'une différence (z_Dmt) entre la valeur moyenne (z_Dm) et la somme d'un basculement et d'un décalage central de la valeur moyenne (z_Dm) ;
    o) Calcul de l'épaisseur (D) axiale en fonction de la direction (h) radiale pour des outils de polissage ronds respectivement (x, y) pour des outils de polissage (22) ovales avec les étapes suivantes : D h = Di + Di * z_Dmt h / di f_a ;
    Figure imgb0050
    ou D x y = Di + Di * z_Dmt x y / di / f_a ;
    Figure imgb0051
     K ⁢ 1 h = K ⁢ 2 h + D h ;
    Figure imgb0052
    ou K ⁢ 1 x y = K ⁢ 2 x y + D x y .
    Figure imgb0053
EP05700889A 2004-01-15 2005-01-13 Dispositif et procede pour polir une surface optique et procede pour realiser un outil de polissage Active EP1711311B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003131A DE102004003131A1 (de) 2004-01-15 2004-01-15 Vorrichtung und Verfahren zum Polieren einer optischen Fläche, optisches Bauelement, sowie Verfahren zum Herstellen eines Polierwerkzeugs
PCT/EP2005/000278 WO2005068133A1 (fr) 2004-01-15 2005-01-13 Dispositif et procede pour polir une surface optique, composant optique, et procede pour realiser un outil de polissage

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EP1711311A1 EP1711311A1 (fr) 2006-10-18
EP1711311B1 EP1711311B1 (fr) 2007-05-02
EP1711311B2 true EP1711311B2 (fr) 2011-07-20

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DE102005038063A1 (de) 2005-08-10 2007-02-15 Schneider Gmbh + Co. Kg Vorgeformtes Blockstück mit drei Auflagepunkten
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DE102008061267A1 (de) 2008-12-10 2010-06-24 Schneider Gmbh & Co. Kg Poliervorrichtung mit Drehdurchführung
DE102009004787A1 (de) * 2009-01-13 2010-07-15 Schneider Gmbh & Co. Kg Vorrichtung und Verfahren zum Polieren von Linsen
IT1393083B1 (it) * 2009-01-27 2012-04-11 Leg Italia S R L Dispositivo di supporto per un utensile abrasivo e correlato utensile abrasivo
US8460060B2 (en) 2009-01-30 2013-06-11 Smr Patents S.A.R.L. Method for creating a complex surface on a substrate of glass
DE102010019491B4 (de) 2010-04-30 2015-07-09 Carl Zeiss Vision International Gmbh Polierwerkzeug zur Bearbeitung von optischen Flächen, insbesondere Freiformflächen
EP2455186A1 (fr) * 2010-11-17 2012-05-23 Schneider GmbH & Co. KG Dispositif et procédé de traitement d'une lentille optique avec identification automatique de la lentille optique
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DE102012216724A1 (de) 2012-09-19 2014-03-20 Carl Zeiss Vision International Gmbh Verfahren und Vorrichtung zur Polierbearbeitung von Brillenlinsen und Gießformen für die Brillenlinsenherstellung sowie entsprechendes Verfahren zur Herstellung von Brillenlinsen und Gießformen für die Brillenlinsenherstellung
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CA2553898C (fr) 2013-10-15
ATE361175T1 (de) 2007-05-15
DE502005000667D1 (de) 2007-06-14
AU2005205040B2 (en) 2010-01-07
EP1711311A1 (fr) 2006-10-18
US20070021036A1 (en) 2007-01-25
WO2005068133A1 (fr) 2005-07-28
US20090163118A1 (en) 2009-06-25
EP1711311B1 (fr) 2007-05-02
AU2005205040A1 (en) 2005-07-28
US7503834B2 (en) 2009-03-17
DE102004003131A1 (de) 2005-08-11

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