EP2760634A1 - Dispositif de polissage de lentilles optiques - Google Patents
Dispositif de polissage de lentilles optiquesInfo
- Publication number
- EP2760634A1 EP2760634A1 EP12775751.6A EP12775751A EP2760634A1 EP 2760634 A1 EP2760634 A1 EP 2760634A1 EP 12775751 A EP12775751 A EP 12775751A EP 2760634 A1 EP2760634 A1 EP 2760634A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- lens
- holder
- axis
- tool holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- 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
- B24B13/012—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools conformable in shape to the optical surface, e.g. by fluid pressure acting on an elastic membrane
-
- 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
-
- 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
- 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
- B24B13/06—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes
-
- 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
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
Definitions
- the invention relates to the field of lens polishing. It relates more particularly to an improved device for polishing lenses.
- polishing is particularly important. It is a question of obtaining on the one hand a quality of finish sufficient to obtain an optical polish to have the transparency of the lens, or to remove defects of surface state during the preceding operation of machining called generation . On the other hand, it is a question of obtaining as precisely as possible the prescribed radii of curvature, so that the actual correction corresponds to the recommended correction, without deformation of the surface which has been generated.
- One current system consists of resting the lens on a deformable surface (foam) and changing the tool on the surface to be polished while rotating the lens on itself. This results in a deformation of the support of the lens according to the shape of the lens itself, which means that depending on where you are, the tool will more or less press the lens and therefore the function of polishing will be distinct from one point to another hence a deformation.
- the document US-2005/0221721 proposes a lens polishing device, in which the polishing tool is mounted on a tool holder fixed at the end of a movable shaft in rotation about its axis and movable in translation along its axis.
- the tool holder is also rotatable about a vertical axis passing close to the tool holder.
- the lens is held on a holding block attached to the end of a rotating shaft about its axis, and in translation along its axis.
- This holding block is also movable in translation along a perpendicular horizontal axis. All these possibilities of movement allow any freedom of positioning of the tool relative to the lens.
- the polishing is not sufficiently regular, the support force of the tool on the lens is not identical in all positions.
- the present invention proposes to remedy at least some of the aforementioned drawbacks and proposes a solution that makes it possible to improve the regularity of the pressure of support of the tool on the lens.
- the invention relates to a device for polishing optical lenses, comprising a lens holder, means for positioning said lens holder and a means for rotating said lens holder around an axis, further comprising a tool polishing device, a tool holder, means for positioning said tool holder and means for rotating said tool holder about an axis.
- This device is particular in that it further comprises a ball disposed between an articulated shaft secured to the tool holder and the positioning means of said tool holder, or between an articulated shaft integral with the lens holder and the positioning means of said lens holder, so as to allow a spherical displacement of said tool, respectively of said lens.
- Such an arrangement makes it possible to obtain displacements along the trajectory of the shape of the surface of the lens to be polished.
- said device may comprise a ball disposed between an articulated shaft integral with the tool holder and the positioning means of said tool holder, so as to allow a spherical movement of said tool, on a sphere whose radius is of the order of length of said articulated shaft,
- said device may further comprise a ball joint disposed between an articulated shaft integral with the lens holder and the positioning means of said lens holder, so as to allow a spherical displacement of said lens, on a sphere whose radius is from order of the length of said articulated shaft, said means for positioning the tool holder, or the lens holder respectively, can comprise a support shaft movable in rotation about its axis, said support shaft comprising at its end said ball joint, and an eccentric box integral with the support shaft, said eccentric caisson comprising a guide means of the articulated axis; such an arrangement allows particularly reliable guidance of the articulated axis,
- said guide means may be configured able to move back and forth between a position close to the axis of rotation of the support shaft and a position remote from said axis, thus making it possible to produce sinusoidal circular paths,
- the tool-holder may be provided with means for detecting the pressure exerted by the tool on the glass, and a regulation loop between the detection means and the positioning means, so as to allow a control of said pressure on all defined areas of the lens,
- said tool can be fixed on said tool holder by means of an elastic means
- said device may comprise a tool support fixed on said tool holder by means of said elastic means, and said tool is fixed on said tool support by means of a deformable part, thus making it possible to add to the known flexibility due to the deformable part, an additional flexibility due to the elastic means,
- said elastic means may be an elastic membrane; this membrane may be flat or have another shape,
- said tool holder may comprise a sealed space containing gas adjacent to said elastic means, so that a force applied on said elastic means produces a variation in the volume of said space, thus making it possible to measure said force, for example by a measurement of the pressure of said gas.
- the present invention further relates to a method of polishing optical lenses using a polishing device according to the invention, wherein said tool describes a circular sinusoid-shaped path.
- a complete revolution does not correspond to an integer number of periods of said trajectory, so that the points of contact between the tool and the lens are not identical between two consecutive turns.
- said lens may comprise zones with different radii of curvature so as to allow use in progressive vision glasses, and the combination of the settings makes it possible to keep the tool always perpendicular to the area of the surface to be polished.
- the advantage of the present invention lies in particular in that it allows polishing along paths ensuring regular polishing on the entire surface of the lens to be polished. It also allows adjustment of the pressure of the tool on the lens at any time, thus guaranteeing a better polishing quality.
- FIG. 1 shows a schematic perspective view of a device according to the state of the art
- FIG. 2 represents a functional schematic view of a device according to the invention
- FIG. 3 shows a sectional view of a tool holder of the device of FIG. 1;
- FIG. 4 represents a graph illustrating an example of trajectory of the tool on the lens
- - Figures 5 and 6 show two graphs illustrating an example of inclination of the tool holder around its ball, respectively corresponding displacement of the articulated shaft;
- a device 1 for polishing lenses comprises a tool 2, a tool holder 3 rotatable about its axis A, and movable in translation along said axis A.
- the assembly is also rotatable about a substantially vertical axis V, which axis V passes close to the tool holder 3, so that the rotational movement about the axis V does not produce significant displacement of the tool, but only its rotation.
- the device 1 further comprises a lens holder 4 adapted to hold a lens 5, and fixed at the end of a shaft 6 mobile in rotation about its axis Z, and movable in translation along said axis Z.
- the assembly door lens, and its shaft are also movable in translation along an axis X perpendicular to the axis Z in the horizontal plane, so that the lens holder can move towards or away from the tool, but also move laterally relative to the tool.
- the present invention relates to a lens polishing device 1.
- the lens 5 is disposed on a lens holder 4 attached to the end of a shaft 6, rotatable about its axis Z.
- a motor 7 is mechanically connected to the shaft 6 and able to rotate it.
- a translation device 8 makes it possible to impart a horizontal translational movement to the lens holder assembly 4 and shaft 6, so that the lens 5 can be moved horizontally while rotating it about the Z axis.
- the tool holder assembly can be moved instead of moving the lens.
- a tool 2 is fixed on a tool holder 3.
- This tool holder comprises a tool support body 16 in which is formed a space 23 may include a gas, for example air.
- a elastic membrane 17, for example flat, is fixed on the one hand to the tool support body by a locking ring 18, on the other hand to the tool holder 19. This is therefore movable relative to the tool support body, so that the pressure exerted on the tool support by the polishing operation results in a reduction of the volume inside the tool support body, and therefore an increase in the pressure.
- a pressure detector 20 makes it possible to measure this pressure variation and to transmit the information to a data processing means such as a PLC or a computer, which then controls a movement of the tool holder towards the lens, if the pressure has decreased, or a movement away from the lens if the pressure has increased.
- a data processing means such as a PLC or a computer
- the elastic membrane 17 also makes it possible to transmit the rotational torque of the tool support body 16 to the tool support 19.
- a connecting piece 21 is clipped onto the tool support.
- This piece is for example plastic.
- a foam pad 22 is adhered to the connecting piece 21, and the tool 2 is glued to the pad 22.
- This tool 2 may take the form of an abrasive polishing sheet.
- the pad is deformable, which allows automatic orientation of the polishing sheet tangent to the lens.
- the elastic membrane enhances the flexibility of the tool.
- the tool carrier is attached to an articulated shaft 9 movable in rotation about its axis, and attached to a support shaft 10, which is here an upper shaft 10, via a ball 11.
- the upper shaft 10 is driven in rotation about its axis by a motor 12, a belt 13, or a chain ensuring the mechanical connection between said motor 12 and the upper shaft 10.
- the ball 11 allows the articulated shaft 9 to take an inclination relative to vertically noted a in the remainder of this description, while transmitting the rotational movement of the upper shaft to the articulated shaft 9, so that the articulated shaft 9 is rotated about its axis.
- the inclination a of the articulated shaft 9 is controlled by a device 14 for horizontal displacement of a point of the articulated shaft 9. Any other device for controlling the inclination could also be suitable.
- a box 15 is rotatable about a substantially vertical axis, and drives the device 14 of horizontal displacement in a path of rotation about the axis of the upper shaft 10.
- the articulated shaft 9 can therefore rotate not only around its axis, but also around the vertical axis of the upper shaft 10, so that the tool holder, while turning on itself describes a path around the vertical, which can be circular if the device 14 for horizontal movement keeps the articulated shaft in a fixed position relative to the vertical, but which can also describe a circular sinusoid, if the device 14 describes a reciprocating movement during the rotation of the box 15 .
- the upper shaft 10 is referred to herein as "upper”, and is effectively located above the articulated shaft 9 in the embodiment of FIG. 2. But it could also be located next to, or below, the articulated shaft 9. For the purposes of this patent application, it will nevertheless be called the “upper shaft”, although it may be lower.
- Figs. 4 to 6 illustrate such a movement, with the tool describing a circle on this trajectory.
- Fig. 5 indicates the variation of the angle ⁇ as a function of the angle of rotation ⁇ over a whole turn (360 °) around the vertical axis.
- Fig. 6 indicates the variation of the distance d of the device 14 with respect to the axis of the upper shaft as a function of the angle of rotation ⁇ over a whole turn (360 °) about the vertical axis.
- These two curves are of the sinusoidal type in the sense that the curve passes above and below the abscissa axis periodically.
- Fig. 4 illustrates the trajectory obtained on the lens, circular sinusoid type, in the sense that the path passes outside and inside a circle, periodically.
- the tool holder turns on itself while describing this path. There will be a phase shift between the back and forth movement of the device 14, and the rotation about the vertical axis, producing a difference in trajectory after each turn.
- the tool finds the same point of the lens after three turns.
- the lens is not circular but oval. The trajectory obtained is adapted to this oval shape. This can for example be achieved through a coordinated horizontal movement of the lens.
- the shape of the lens may be any, the oval shape being only one example of possible shape.
- the shaft 6 can be subdivided into a vertical lower support shaft, and an articulated shaft, connected to the support shaft by a ball joint, in a manner similar to the construction of the Articulated shaft for the tool holder.
- Such an arrangement can facilitate the polishing of convex glasses by reducing the vertical movements of adaptation of the tool holder which must always be precisely on the surface of the lens.
- only the shaft supporting the lens holder is made of a vertical shaft and an articulated shaft, and the shaft supporting the tool holder is devoid of such a ball joint.
- Such a provision is not outside the scope of the invention.
- the term "vertical” is used here for the simplicity of the description, but a provision where said tree is inclined or even horizontal is not beyond the scope of the present invention.
- the fact of off-centering the tool on a path around the axis of rotation of the upper shaft prevents the accumulation of polishing dust, which are always driven from one side or the other .
- the tool is always in direct contact with the lens, and performs a optimized polishing. Indeed the accumulation of dust between the tool and the lens would reduce the quality of polishing, and can cause scratches on the lens.
- the advantage of the present invention lies in particular in that it allows polishing along paths ensuring regular polishing on the entire surface of the lens to be polished. It also allows the pressure of the tool to be adjusted to the lens at any time, thus ensuring better polishing quality, especially for soft materials such as plastics.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1158600A FR2980386B1 (fr) | 2011-09-27 | 2011-09-27 | Dispositif de polissage de lentilles optiques |
PCT/FR2012/052108 WO2013045795A1 (fr) | 2011-09-27 | 2012-09-21 | Dispositif de polissage de lentilles optiques |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2760634A1 true EP2760634A1 (fr) | 2014-08-06 |
EP2760634B1 EP2760634B1 (fr) | 2017-12-27 |
Family
ID=47071336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12775751.6A Not-in-force EP2760634B1 (fr) | 2011-09-27 | 2012-09-21 | Dispositif de polissage de lentilles optiques |
Country Status (8)
Country | Link |
---|---|
US (1) | US9764441B2 (fr) |
EP (1) | EP2760634B1 (fr) |
CN (1) | CN104105572B (fr) |
BR (1) | BR112014007333A2 (fr) |
FR (1) | FR2980386B1 (fr) |
HK (1) | HK1202095A1 (fr) |
IN (1) | IN2014DN03156A (fr) |
WO (1) | WO2013045795A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI584914B (zh) * | 2013-07-22 | 2017-06-01 | 佳能股份有限公司 | 元件製造方法及拋光裝置 |
CN103707170B (zh) * | 2013-12-30 | 2016-07-06 | 南阳中一光学装备有限公司 | 主动式逆转抛光机 |
CN105856041A (zh) * | 2016-05-10 | 2016-08-17 | 安徽坤昌家具有限公司 | 一种家具木材用抛光装置 |
WO2019138471A1 (fr) | 2018-01-10 | 2019-07-18 | 株式会社ジーベックテクノロジー | Support de brosse de polissage et dispositif de polissage |
CN110303407B (zh) * | 2019-08-05 | 2024-02-09 | 四川欧曼机械有限公司 | 一种自动球型阀座研磨机 |
US20240042567A1 (en) * | 2021-02-12 | 2024-02-08 | Essilor International | Method for polishing an optical lens |
CN113601321B (zh) * | 2021-07-29 | 2022-12-13 | 浙江黄岩环日光学有限公司 | 一种镜片抛光机 |
Family Cites Families (28)
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US2352146A (en) * | 1939-03-02 | 1944-06-20 | W F And John Barnes Company | Grinding and polishing machine |
US2371303A (en) * | 1944-03-29 | 1945-03-13 | Method and apparatus tor grinding | |
GB574084A (en) * | 1944-06-30 | 1945-12-19 | Avimo Ltd | Improvements relating to lens polishing machines |
FR1523358A (fr) * | 1967-03-21 | 1968-05-03 | Lunetiers | Perfectionnement aux machines à surfacer les lentilles, notamment, les lentilles ophtalmiques |
FR2142562B1 (fr) * | 1971-06-21 | 1973-05-25 | Cmv | |
US3732647A (en) * | 1971-08-05 | 1973-05-15 | Coburn Manuf Co Inc | Polisher-finer machine |
US3900972A (en) * | 1974-09-11 | 1975-08-26 | Itek Corp | Apparatus for polishing toroidal surfaces |
US4320599A (en) * | 1980-06-24 | 1982-03-23 | Coburn Optical Industries, Inc. | Polisher-finer apparatus |
US4956944A (en) * | 1987-03-19 | 1990-09-18 | Canon Kabushiki Kaisha | Polishing apparatus |
JPH0661691B2 (ja) * | 1989-09-29 | 1994-08-17 | オリンパス光学工業株式会社 | 光学素子研磨方法および装置 |
DE4214266A1 (de) * | 1992-05-01 | 1993-11-04 | Loh Engineering Ag Oensingen | Vorrichtung zur fuehrung eines werkstuecks oder werkzeugs bei der bearbeitung torischer oder sphaerischer flaechen optischer linsen auf schleif- oder poliermaschinen |
US6149506A (en) * | 1998-10-07 | 2000-11-21 | Keltech Engineering | Lapping apparatus and method for high speed lapping with a rotatable abrasive platen |
CN2365011Y (zh) * | 1999-05-05 | 2000-02-23 | 胡秀 | 散光弧摆精磨抛光机 |
JP2003117790A (ja) * | 2001-10-12 | 2003-04-23 | Haruchika Seimitsu:Kk | レンズ研磨装置におけるレンズ球面加工装置とその加工方法 |
DE10248104A1 (de) * | 2001-10-17 | 2003-05-22 | Schneider Gmbh & Co Kg | Linsenbearbeitungsmaschine, insbesondere zum Polieren von Linsen |
US6712670B2 (en) * | 2001-12-27 | 2004-03-30 | Lam Research Corporation | Method and apparatus for applying downward force on wafer during CMP |
DE10250856A1 (de) * | 2002-10-25 | 2004-05-13 | Carl Zeiss | Verfahren und Vorrichtung zum Herstellen von optischen Gläsern |
US7125313B2 (en) * | 2003-02-25 | 2006-10-24 | Novellus Systems, Inc. | Apparatus and method for abrading a workpiece |
DE10319945A1 (de) * | 2003-05-02 | 2005-01-27 | Loh Optikmaschinen Ag | Werkzeug zur Feinbearbeitung von optisch wirksamen Flächen |
DE102004003131A1 (de) * | 2004-01-15 | 2005-08-11 | Carl Zeiss | Vorrichtung und Verfahren zum Polieren einer optischen Fläche, optisches Bauelement, sowie Verfahren zum Herstellen eines Polierwerkzeugs |
US20050221721A1 (en) * | 2004-04-05 | 2005-10-06 | Valle Hector Leopoldo A | Method and apparatus for grinding and polishing free-form ophthalmic surfaces |
FR2875155B1 (fr) * | 2004-09-10 | 2006-12-08 | Essilor Int | Outil de polissage comportant un plateau d'entrainement et un patin amovible pour la finition d'une lentille ophtalmique |
DE102005010583A1 (de) * | 2005-03-04 | 2006-09-07 | Satisloh Gmbh | Polierteller für ein Werkzeug zur Feinbearbeitung von optisch wirksamen Flächen an insbesondere Brillengläsern |
DE102007042667A1 (de) * | 2007-09-10 | 2009-03-12 | Schneider Gmbh & Co. Kg | Poliermaschine für Linsen und Verfahren zum Polieren einer Linse mit einer Bearbeitungsmaschine |
FR2937574A1 (fr) * | 2008-10-29 | 2010-04-30 | Guy Monnoyeur | Dispositif et procede d'usinage et/ou de polissage de lentille |
US20100159804A1 (en) * | 2008-12-22 | 2010-06-24 | Araca, Inc. | Method of observing pattern evolution using variance and fourier transform spectra of friction forces in cmp |
DE102010019491B4 (de) * | 2010-04-30 | 2015-07-09 | Carl Zeiss Vision International Gmbh | Polierwerkzeug zur Bearbeitung von optischen Flächen, insbesondere Freiformflächen |
TWI584914B (zh) * | 2013-07-22 | 2017-06-01 | 佳能股份有限公司 | 元件製造方法及拋光裝置 |
-
2011
- 2011-09-27 FR FR1158600A patent/FR2980386B1/fr active Active
-
2012
- 2012-09-21 WO PCT/FR2012/052108 patent/WO2013045795A1/fr active Application Filing
- 2012-09-21 CN CN201280058226.6A patent/CN104105572B/zh not_active Expired - Fee Related
- 2012-09-21 EP EP12775751.6A patent/EP2760634B1/fr not_active Not-in-force
- 2012-09-21 BR BR112014007333A patent/BR112014007333A2/pt not_active IP Right Cessation
- 2012-09-21 US US14/347,620 patent/US9764441B2/en active Active
-
2014
- 2014-04-21 IN IN3156DEN2014 patent/IN2014DN03156A/en unknown
-
2015
- 2015-03-17 HK HK15102691.1A patent/HK1202095A1/xx not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2013045795A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2980386A1 (fr) | 2013-03-29 |
WO2013045795A1 (fr) | 2013-04-04 |
CN104105572B (zh) | 2017-10-27 |
US20140235142A1 (en) | 2014-08-21 |
HK1202095A1 (en) | 2015-09-18 |
FR2980386B1 (fr) | 2014-09-12 |
CN104105572A (zh) | 2014-10-15 |
EP2760634B1 (fr) | 2017-12-27 |
US9764441B2 (en) | 2017-09-19 |
BR112014007333A2 (pt) | 2017-04-04 |
IN2014DN03156A (fr) | 2015-05-22 |
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