EP0961669A1 - Method for finishing spectacle lenses, and related device - Google Patents
Method for finishing spectacle lenses, and related deviceInfo
- Publication number
- EP0961669A1 EP0961669A1 EP97947109A EP97947109A EP0961669A1 EP 0961669 A1 EP0961669 A1 EP 0961669A1 EP 97947109 A EP97947109 A EP 97947109A EP 97947109 A EP97947109 A EP 97947109A EP 0961669 A1 EP0961669 A1 EP 0961669A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinder
- lens
- reading
- spectacle lens
- contour
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
- B24B9/148—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms electrically, e.g. numerically, controlled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
- B24B9/144—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms the spectacles being used as a template
Definitions
- the invention relates to a method for retouching spectacle lens after a first cut of it, of the type according to which, in view of a new passage of this spectacle lens on a grinder, a clean gripping block is implanted on it when placed on such a grinder.
- a process is conventionally used by opticians for the precise adaptation of a lens to a spectacle frame of their client.
- the invention also relates to the associated device.
- Spectacle lenses are manufactured in the form of substantially circular parts ensuring a certain optical correction. They are then cut by the manufacturer or the optician according to the shape of the frame of the glasses chosen by the customer. It is clear that the size must be made taking into account both the shape of the frame and the position of the eyes of the user. The optical center of the lens must indeed be correctly placed in front of the eye, to produce the desired vision correction.
- the size is carried out slightly beyond the size dimensions initially requested, and a touch-up is necessary to perfectly adapt the lens to the frame, in particular in the case of metal frames.
- the optician it is then for the optician to make the retouching size of the glass according to the same constraints of shape and optical center, and in a time interval naturally limited by the desire of the customer to quickly recover his glasses.
- the lens is most often removed from its initial size support, to test the lens on the frame, and the defect is only detected then.
- the optician no longer cuts the lens directly, but transmits the measurements corresponding to a frame and a client to the lens manufacturer, who delivers him the cut and playful lens, disassembled from its support. size, this glass must then possibly be retouched.
- the first one consists of a "judged" retouch by the optician, by cutting all or part of the outline of the glass, with obvious drawbacks of lack of precision of the shape or partial off-center of the optical center relative to the eye of the user.
- the second method consists in using an automated machine which requires the optician to center (orientation) and center (position) the glass precisely, then to implant the gripping block on the glass at a precise point in taking into account the position of the user's eye.
- the optician then probes with a mechanical or digital contour reader the desired final shape for the lens, corresponding to the client's frame.
- the contour reader then controls the grinding of the blocked glass and placed on the grinder according to the desired final shape. This method is complex and time-consuming, and any positioning error affects the final shape of the glass after grinding.
- the invention relates, for its part, to a method for retouching spectacle lens, which is quick to use, which enables precise retouching of the lens to be carried out.
- the invention provides for this purpose a method for retouching a spectacle lens after a first size thereof, of the kind according to which, in view of a new passage of this spectacle lens on a grinder, one implants on it a gripping block suitable for its installation on such a grinder, characterized in that the block is implanted at any point on the spectacle lens preferably close to the center, the contour of the spectacle lens is read. leading to the reading of a form read for this spectacle lens, and the grinder is operated according to the difference between this read form and the final shape sought.
- the form read is compared to the final form sought, a grinding function is established taking into account the difference between this read form and this final form, and the grinder is piloted accordingly.
- the invention also relates to a device for implementing a method in accordance with the preceding description, comprising means suitable for a comparison between two forms and means suitable for establishing a grinding function taking account of the difference between these two forms.
- FIG. 1 is a schematic representation of the principle of reading the contour of the glass
- FIG. 2 is a representation of the final shape sought for the glass
- FIG. 3 is a diagram of the grinding path for touching up the glass according to the desired final shape.
- the optician has a device for implanting a gripping block on glass of retouching glasses, an apparatus 2 for reading the contour, for example of a mechanical nature, and a bezel glass grinder, these various means being of a conventional nature in the field and therefore not being detailed here further.
- a gripping block 3 which is for example in the form of a
- acorn is firstly fixed by the optician at any point 4, preferably close to the center of the glass 5, and the glass 1 is thus secured to an axis A substantially perpendicular to its reference plane.
- the glass is then fixed in the contour reader 2 (FIG. 1), around its block 3 for example, in any orientation characterized by the axes 6, 7.
- the shape information 9 read from the glass, obtained by this probe 8 is transmitted to a control unit, which is conventionally a computer integrated into the contour reader 2.
- the final shape 10 sought for the glass is also stored in a known manner in the control unit, and is for example defined (FIG.
- the computer controls the grinding, carried out on part or all of the contour of the glass 1, in a conventional manner.
- the method has an advantage of simplicity of use for the optician, and time saving overall, the time taken to read the contour and calculate the correction of the grinding trajectory being largely compensated by the elimination of the centering and orientation time of the lens by the optician.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/FR1997/002099 WO1999026759A1 (en) | 1997-11-20 | 1997-11-20 | Method for finishing spectacle lenses, and related device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0961669A1 true EP0961669A1 (en) | 1999-12-08 |
EP0961669B1 EP0961669B1 (en) | 2002-06-05 |
Family
ID=9504039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97947109A Expired - Lifetime EP0961669B1 (en) | 1997-11-20 | 1997-11-20 | Method for finishing spectacle lenses, and related device |
Country Status (6)
Country | Link |
---|---|
US (1) | US6250993B1 (en) |
EP (1) | EP0961669B1 (en) |
JP (1) | JP2001516289A (en) |
DE (1) | DE69713161T2 (en) |
ES (1) | ES2178018T3 (en) |
WO (1) | WO1999026759A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007012713A1 (en) | 2005-07-26 | 2007-02-01 | Essilor International (Compagnie Generale D'optique) | Method for trimming an ophthalmologic lens with reacquisition of an initial centering reference frame |
FR2893724A1 (en) * | 2005-11-24 | 2007-05-25 | Essilor Int | Ophthalmic lens working e.g. trimming method for mounting lens on frame involves embedding beveling groove with bevel from acquired geometrical coordinates by using relative mobility of lens with respect to finishing stone |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2028530A1 (en) * | 2007-12-28 | 2009-02-25 | Essilor International (Compagnie Generale D'optique) | A method for modifying spectacle frame shape data |
EP2184132B1 (en) * | 2008-11-07 | 2013-05-08 | Essilor International (Compagnie Générale D'Optique) | A method of and an apparatus for manufacturing an optical lens |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4025033A (en) | 1974-07-07 | 1977-05-24 | Hodges Lee R | Apparatus for dispensing a bonding agent |
DE8605286U1 (en) | 1986-02-27 | 1986-04-17 | Wernicke & Co GmbH, 4000 Düsseldorf | Device on spectacle lens edge grinding machines for clamping the spectacle lens |
WO1988004974A1 (en) | 1987-01-12 | 1988-07-14 | Hoya Corporation | Method and apparatus for processing circumference of spectacle lens |
US5148637A (en) | 1990-02-27 | 1992-09-22 | Bausch & Lomb Incorporated | Lens edging system with programmable feed and speed control |
IE67140B1 (en) | 1990-02-27 | 1996-03-06 | Bausch & Lomb | Lens edging system |
DE4012660A1 (en) | 1990-04-20 | 1991-10-24 | Wernicke & Co Gmbh | Spectacle lens edge machining system - uses peripheral edge data for spectacle lens to control final machining |
DE4320934C2 (en) * | 1993-06-24 | 1995-04-20 | Wernicke & Co Gmbh | Spectacle lens edge grinding machine |
IT230613Y1 (en) | 1993-07-27 | 1999-06-09 | Cms Service Srl | ORGANIC LENS SHAPING AND MILLING MACHINE FOR SUNGLASSES AND PROTECTIVE SUNGLASSES |
FR2717413B1 (en) | 1994-03-15 | 1996-05-15 | Essilor Int | Method for determining the restitution error of an overflow machine with which a contour reading device is associated, and application to the self-calibration of the assembly. |
JP4046789B2 (en) * | 1996-10-31 | 2008-02-13 | 株式会社ニデック | Eyeglass lens grinding machine and eyeglass lens grinding method |
DE19702287C2 (en) * | 1997-01-23 | 1999-02-11 | Wernicke & Co Gmbh | Method for determining the course of the facets on the edge of spectacle lenses to be processed and for controlling the processing of shapes in accordance with the determined course of the facets |
-
1997
- 1997-11-20 EP EP97947109A patent/EP0961669B1/en not_active Expired - Lifetime
- 1997-11-20 JP JP52773199A patent/JP2001516289A/en not_active Ceased
- 1997-11-20 ES ES97947109T patent/ES2178018T3/en not_active Expired - Lifetime
- 1997-11-20 DE DE69713161T patent/DE69713161T2/en not_active Expired - Fee Related
- 1997-11-20 US US09/341,870 patent/US6250993B1/en not_active Expired - Fee Related
- 1997-11-20 WO PCT/FR1997/002099 patent/WO1999026759A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9926759A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007012713A1 (en) | 2005-07-26 | 2007-02-01 | Essilor International (Compagnie Generale D'optique) | Method for trimming an ophthalmologic lens with reacquisition of an initial centering reference frame |
FR2893724A1 (en) * | 2005-11-24 | 2007-05-25 | Essilor Int | Ophthalmic lens working e.g. trimming method for mounting lens on frame involves embedding beveling groove with bevel from acquired geometrical coordinates by using relative mobility of lens with respect to finishing stone |
Also Published As
Publication number | Publication date |
---|---|
EP0961669B1 (en) | 2002-06-05 |
JP2001516289A (en) | 2001-09-25 |
ES2178018T3 (en) | 2002-12-16 |
DE69713161D1 (en) | 2002-07-11 |
WO1999026759A1 (en) | 1999-06-03 |
US6250993B1 (en) | 2001-06-26 |
DE69713161T2 (en) | 2003-01-16 |
WO1999026759A8 (en) | 2000-03-02 |
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