EP0409760A1 - Appareil pour centrer et poser des verres ophtalmiques - Google Patents
Appareil pour centrer et poser des verres ophtalmiques Download PDFInfo
- Publication number
- EP0409760A1 EP0409760A1 EP90500068A EP90500068A EP0409760A1 EP 0409760 A1 EP0409760 A1 EP 0409760A1 EP 90500068 A EP90500068 A EP 90500068A EP 90500068 A EP90500068 A EP 90500068A EP 0409760 A1 EP0409760 A1 EP 0409760A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- column
- lens
- ophthalmic lens
- video camera
- rotation
- 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
Images
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
- B24B13/005—Blocking means, chucks or the like; Alignment devices
-
- 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
- B24B9/146—Accessories, e.g. lens mounting devices
Definitions
- the invention relates to an apparatus for centering and blocking ophthalmic lenses for use in lens bevelling machines.
- the apparatus is provided with support means for the ophthalmic lens; means for adhering a member to said ophthalmic lens; a monitor receiving a digital image of the contour of the shape to be obtained by bevelling; and a video camera which is located vertically above the said ophthalmic lens, picks up images and transmits them to said monitor.
- ophthalmic lenses are manufactured generally in the form of a concavo-convex spherical cap and the characteristics of their graduation involve differences in thickness and also in the curvature of the surfaces thereof.
- the above mentioned lens is from time to time called ophthalmic lens blank.
- Ophthalmic lenses have to be prepared for fitting to a specific frame, involving a modification of the perimeter thereof to adapt it to the frame. This operation is performed on the said lens bevelling machines which are provided with grindstones for abrading and final polishing of the said perimeter.
- the video camera obtains an image of the ophthalmic lens directly therefrom, whereby errors are easily made due to the thickness of the lens.
- the ophthalmic lens blank which is moved, whereby the member to be adhered thereto for the bevelling process is applied in a position not coinciding with the lens optical centre.
- This offset blocking causes undesired variations in the lens position during the bevelling process.
- an apparatus of the type described at the beginning has been devised, characterised fundamentally in that it comprises: a) an optical unit having at least one condensing lens and by a light-emitting source, said unit being situated at a lower level than said support means and defining an optical axis; and b) an at least partially transparent screen, adapted to be located with the centre thereof aligned with said optical axis, inserted between said video camera and said support means and capable of receiving an image, projected by said optical unit, of the ophthalmic lens situated on said support means; and in that the distance between the video camera and the transparent screen is constant.
- the apparatus of the invention comprises a platform 1 and a column 2, a lower portion of which is supported in a fixed housing 3.
- the column may be actuated by a drive means comprising an electric motor 4, located above a support 5 and provided with a shaft 6 driving a drive pinion 7 which meshes with a ring gear situated externally of a rotary bushing 8, which is surrounded by the fixed housing 3.
- the column 2 is fixedly attached to a generally radially outwardly extending guide pin 9 which passes through, in the first place, a helical slot (not shown) formed in the rotary bushing and, in the second place, a generally inverted L-shaped slot 10.
- a helical slot not shown
- the guide pin 9 is in the vertical leg of the L-shaped slot 10
- rotation of the bushing 8 causes a vertical movement of the column and when the guide pin 9 is in the generally horizontal leg of the L, the same rotation of the bushing 8 causes the column 2 to rotate.
- the shaft 6 is provided with a cam 11 engag ing an optical switch 12 stopping the motor 4.
- a surrounding member 13 is supported on the fixed housing 3 and the upper portion thereof surrounds the column 2 and is extended to form the upper arm 13a which carried the video camera 14.
- the lower portion of the surrounding member 13 also surrounds the column 2 and supports a lower arm 16 in which there is mounted a semitransparent screen 15 situated vertically below the camera 14, with the distance therebetween being constant.
- the screen 15 is preferably provided with a mark corresponding with the centre thereof and a further mark showing an axis.
- intermediate arm 17 which, as stated above, is angularly offset from the other two arms.
- the intermediate arm 17 carries a ball joint 18 for receiving a member 19, provided with adhesive means, to be referred to hereinafter.
- the said arm 17 is provided with a notch for a positioner 21 sliding in an elongate orifice 22 of the surrounding member 13.
- an optical unit constituted by a support 23, on which there is held, by means of a protective disc 24 and supports 25, an ophthalmic lens 26 to be centered and blocked.
- the optical unit comprises at least one condensing lens 27 and, at a lower level, a 1amp 28, mounted on a bracket 29 and associated with a power control 30.
- the platform 1 also carries a device comprising a manual control 31 which, by way of a cam 32, actuates a rightangled lever 35 which rocks about the apex thereof. As it rocks, the lever 35 engages the stem 36 whereby the surrounding member 13 is axially moved.
- the apparatus works as follows: initially a member 19 is mounted on the ball joint 18 of the inter mediate arm 17. Furthermore, the ophthalmic lens 26 to be centered and blocked is mounted on the support means 25. The centre and axis marks of the screen 15 allow for appropriate mounting of the lens 26.
- the light-emitting source 28 is illuminated, whereby the condensing lenses 27 produce an image of the ophthalmic lens 26.
- this picks up the image which is picked up by the video camera 14.
- the video camera 14 picks up the plane image produced on the screen 15, whereby any error due to the direct viewing of the lens 26, the thickness of which may cause distorsion, is avoided.
- the image picked up by the camera 14 is transmitted to a not shown monitor which at the same time picks up the image of the frame ring to which the lens 26 is to be mounted, the latter image having been suitably moved depending on the required corrections, in the light of the wearer's and the frame's data.
- the superimpositioning of both images allows it to be checked whether the lens 26 is suitable for the chosen frame,
- the drive device causes angular movement of the upper and lower arms 13a and 16, respectively, and at the same time an equal angular movement of the intermediate arm 17, whereby the ball joint 18 and the member 19 are aligned with the optical axis of the optical unit.
- Lowering of the column 2 causes a lowering of the intermediate arm 17, until the member 19 is adhered to the ophthalmic lens 26, precisely on the geometric and optical centre thereof.
- Operation is initiated with the actuation of a microswitch 33 and is controlled by an electronic card 34, which also causes reverse movement of the arms 13a, 16 and 17, leaving the machine ready for receiving a new ophthalmic lens.
- the lens 26 receives the blocking member 19 on the centre thereof, whereby during the subsequent bevelling process, the ophthalmic lens rotates in a fully satisfactory way.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES8902510 | 1989-07-17 | ||
ES8902510A ES2014801A6 (es) | 1989-07-17 | 1989-07-17 | Aparato para el centrado y bloqueado de lentes oftalmologicas> |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0409760A1 true EP0409760A1 (fr) | 1991-01-23 |
EP0409760B1 EP0409760B1 (fr) | 1993-12-01 |
Family
ID=8263111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900500068 Revoked EP0409760B1 (fr) | 1989-07-17 | 1990-07-16 | Appareil pour centrer et poser des verres ophtalmiques |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0409760B1 (fr) |
DE (1) | DE69004881T2 (fr) |
ES (2) | ES2014801A6 (fr) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0601395A1 (fr) * | 1992-12-09 | 1994-06-15 | NATIONAL OPTRONICS, Inc. | Adaptateur pour une lentille optique et méthode d'application |
GB2281525A (en) * | 1993-09-07 | 1995-03-08 | Gerber Optical Inc | Lens blocking apparatus |
EP0727279A1 (fr) * | 1995-02-18 | 1996-08-21 | Wernicke & Co. GmbH | Appareil de glantage pour lentilles |
FR2753642A1 (fr) * | 1996-09-24 | 1998-03-27 | Gerber Optical Inc | Appareil et procede d'attache d'un bloc de finition a une lentille |
EP0876874A2 (fr) * | 1997-05-06 | 1998-11-11 | INDO Internacional, S.A. | Dispositif de centrage et de blocage des disques de lentilles ophtalmiques |
EP0933163A1 (fr) * | 1998-01-30 | 1999-08-04 | Nidek Co., Ltd. | Appareil de glantage pour lentilles |
EP0947287A2 (fr) * | 1998-03-31 | 1999-10-06 | Nidek Co., Ltd. | Dispositif d'alignement axial, système d'usinage de verre de lunettes et dispositif de préparation d'usinage de verre de lunettes comprenant ce système |
FR2794045A1 (fr) * | 1999-05-27 | 2000-12-01 | Briot Int | Dispositif de centrage et de positionnement d'une ebauche de verre de lunettes |
WO2001045897A1 (fr) * | 1999-12-21 | 2001-06-28 | Johnson & Johnson Vision Care, Inc. | Ebarbeuse automatique |
US6481095B1 (en) | 1999-08-31 | 2002-11-19 | Nidek Co., Ltd. | Cup attaching apparatus |
US6599171B2 (en) | 2000-04-28 | 2003-07-29 | Nidek Co., Ltd. | Cup attaching apparatus |
US6798501B1 (en) | 1998-01-30 | 2004-09-28 | Nidek Co., Ltd. | Cup attaching apparatus |
FR2866721A1 (fr) * | 2004-02-24 | 2005-08-26 | Essilor Int | Methode de centrage manuel d'une lentille ophtalmique de lunettes avec affichage intermittent d'un signe opaque servant a la correction de l'erreur de deviation prismatique induite par la lentille |
FR2866718A1 (fr) * | 2004-02-24 | 2005-08-26 | Essilor Int | Dispositif centreur-bloqueur d'une lentille ophtalmique de lunettes, methode de detection automatique et methodes de centrage manuel associees |
FR2866719A1 (fr) * | 2004-02-24 | 2005-08-26 | Essilor Int | Methode de contrage manuel d'une lentille ophtalmique de lunettes dans un centreur-bloqueur et dispositif centreur-bloqueur associe |
US7150672B2 (en) | 2001-03-26 | 2006-12-19 | Nidek Co., Ltd. | Cup attaching apparatus |
US8506354B2 (en) | 2007-03-30 | 2013-08-13 | Nidek Co., Ltd. | Cup attaching apparatus |
EP3158388B1 (fr) * | 2014-06-23 | 2020-01-29 | Essilor International | Appareil centreur-bloqueur pour lentille ophtalmique |
JP2021504173A (ja) * | 2017-11-29 | 2021-02-15 | ヒュビッツ カンパニー リミテッドHuvitz Co.,Ltd. | レンズブロッカー |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2257978B1 (es) * | 2006-03-09 | 2007-05-01 | Indo Internacional S.A. | Equipo de captura de contorno, marcas, taladros, fresados y grabados de una lente oftalmica o de un talco para gafas. |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3828842A (en) * | 1971-08-25 | 1974-08-13 | Essilor Int | Apparatus for fixing mounting means on spectacle lenses |
DE2713168A1 (de) * | 1977-03-25 | 1978-09-28 | Wernicke & Co Gmbh | Verfahren und vorrichtung zum zentrierten und dezentrierten befestigen eines saugers, eines metallblockes oder einer klebefolie auf einem brillenrohglas |
US4169318A (en) * | 1976-10-23 | 1979-10-02 | Proptis, S.A. | Apparatus for the preparation of eyeglass lenses, prior to the shaping and/or bevelling thereof |
FR2582975A1 (fr) * | 1985-06-10 | 1986-12-12 | Briot Int | Appareil pour centrer et poser un adaptateur sur une ebauche de verre optique et pour commander une rectifieuse |
-
1989
- 1989-07-17 ES ES8902510A patent/ES2014801A6/es not_active Expired - Fee Related
-
1990
- 1990-07-16 EP EP19900500068 patent/EP0409760B1/fr not_active Revoked
- 1990-07-16 DE DE1990604881 patent/DE69004881T2/de not_active Revoked
- 1990-07-16 ES ES90500068T patent/ES2047299T3/es not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3828842A (en) * | 1971-08-25 | 1974-08-13 | Essilor Int | Apparatus for fixing mounting means on spectacle lenses |
US4169318A (en) * | 1976-10-23 | 1979-10-02 | Proptis, S.A. | Apparatus for the preparation of eyeglass lenses, prior to the shaping and/or bevelling thereof |
DE2713168A1 (de) * | 1977-03-25 | 1978-09-28 | Wernicke & Co Gmbh | Verfahren und vorrichtung zum zentrierten und dezentrierten befestigen eines saugers, eines metallblockes oder einer klebefolie auf einem brillenrohglas |
FR2582975A1 (fr) * | 1985-06-10 | 1986-12-12 | Briot Int | Appareil pour centrer et poser un adaptateur sur une ebauche de verre optique et pour commander une rectifieuse |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5425665A (en) * | 1992-12-09 | 1995-06-20 | National Optronics, Inc. | Optical lens blocker and method |
EP0601395A1 (fr) * | 1992-12-09 | 1994-06-15 | NATIONAL OPTRONICS, Inc. | Adaptateur pour une lentille optique et méthode d'application |
GB2281525A (en) * | 1993-09-07 | 1995-03-08 | Gerber Optical Inc | Lens blocking apparatus |
FR2709694A1 (fr) * | 1993-09-07 | 1995-03-17 | Gerber Optical Inc | Appareil de blocage de lentilles. |
US5505654A (en) * | 1993-09-07 | 1996-04-09 | Gerber Optical, Inc. | Lens blocking apparatus |
GB2281525B (en) * | 1993-09-07 | 1996-10-02 | Gerber Optical Inc | Lens blocking apparatus |
EP0727279A1 (fr) * | 1995-02-18 | 1996-08-21 | Wernicke & Co. GmbH | Appareil de glantage pour lentilles |
DE19742171C2 (de) * | 1996-09-24 | 2000-01-05 | Gerber Coburn Optical Inc | Vorrichtung und Verfahren zum Anbringen eines Tragkörpers an einer Linse |
FR2753642A1 (fr) * | 1996-09-24 | 1998-03-27 | Gerber Optical Inc | Appareil et procede d'attache d'un bloc de finition a une lentille |
EP0876874A2 (fr) * | 1997-05-06 | 1998-11-11 | INDO Internacional, S.A. | Dispositif de centrage et de blocage des disques de lentilles ophtalmiques |
EP0876874A3 (fr) * | 1997-05-06 | 2002-01-02 | INDO Internacional, S.A. | Dispositif de centrage et de blocage des disques de lentilles ophtalmiques |
EP0933163A1 (fr) * | 1998-01-30 | 1999-08-04 | Nidek Co., Ltd. | Appareil de glantage pour lentilles |
US6798501B1 (en) | 1998-01-30 | 2004-09-28 | Nidek Co., Ltd. | Cup attaching apparatus |
EP0947287A2 (fr) * | 1998-03-31 | 1999-10-06 | Nidek Co., Ltd. | Dispositif d'alignement axial, système d'usinage de verre de lunettes et dispositif de préparation d'usinage de verre de lunettes comprenant ce système |
EP0947287A3 (fr) * | 1998-03-31 | 2003-04-23 | Nidek Co., Ltd. | Dispositif d'alignement axial, système d'usinage de verre de lunettes et dispositif de préparation d'usinage de verre de lunettes comprenant ce système |
FR2794045A1 (fr) * | 1999-05-27 | 2000-12-01 | Briot Int | Dispositif de centrage et de positionnement d'une ebauche de verre de lunettes |
EP1057589A1 (fr) * | 1999-05-27 | 2000-12-06 | Briot International | Dispositif de centrage et de positionnement d'une ébauche de verre de lunettes |
US6481095B1 (en) | 1999-08-31 | 2002-11-19 | Nidek Co., Ltd. | Cup attaching apparatus |
WO2001045897A1 (fr) * | 1999-12-21 | 2001-06-28 | Johnson & Johnson Vision Care, Inc. | Ebarbeuse automatique |
US6599171B2 (en) | 2000-04-28 | 2003-07-29 | Nidek Co., Ltd. | Cup attaching apparatus |
US7150672B2 (en) | 2001-03-26 | 2006-12-19 | Nidek Co., Ltd. | Cup attaching apparatus |
WO2005092571A1 (fr) * | 2004-02-24 | 2005-10-06 | Essilor International | Methode de centrage manuel d'une lentille ophtalmique de lunettes avec affichage intermittent d'un signe opaque servant à la correction de l'erreur de déviation prismatique induite par la lentille |
FR2866719A1 (fr) * | 2004-02-24 | 2005-08-26 | Essilor Int | Methode de contrage manuel d'une lentille ophtalmique de lunettes dans un centreur-bloqueur et dispositif centreur-bloqueur associe |
WO2005092570A1 (fr) * | 2004-02-24 | 2005-10-06 | Essilor International (Compagnie Générale d'Optique) | Methode de centrage manuel d'une lentille ophtalmique dans un centreur-bloqueur et dispositif centreur-bloqueur associe |
FR2866718A1 (fr) * | 2004-02-24 | 2005-08-26 | Essilor Int | Dispositif centreur-bloqueur d'une lentille ophtalmique de lunettes, methode de detection automatique et methodes de centrage manuel associees |
FR2866721A1 (fr) * | 2004-02-24 | 2005-08-26 | Essilor Int | Methode de centrage manuel d'une lentille ophtalmique de lunettes avec affichage intermittent d'un signe opaque servant a la correction de l'erreur de deviation prismatique induite par la lentille |
US7527377B2 (en) | 2004-02-24 | 2009-05-05 | Essilor International (Compagnie Generale D'optique) | Method for manually centering an ophthalmic lens in a centering/blocking device and associated centering/blocking device |
CN100484712C (zh) * | 2004-02-24 | 2009-05-06 | 埃西勒国际(通用光学公司) | 在定中心和锁定设备中手动地为镜片定中心的方法以及相关联的定中心和锁定设备 |
US7530690B2 (en) | 2004-02-24 | 2009-05-12 | Essilor International (Compagnie Generale D'optique) | Centering and blocking device for an ophthalmic spectacles lens, an automatic detection method, and associated manual centering methods |
US8506354B2 (en) | 2007-03-30 | 2013-08-13 | Nidek Co., Ltd. | Cup attaching apparatus |
EP3158388B1 (fr) * | 2014-06-23 | 2020-01-29 | Essilor International | Appareil centreur-bloqueur pour lentille ophtalmique |
JP2021504173A (ja) * | 2017-11-29 | 2021-02-15 | ヒュビッツ カンパニー リミテッドHuvitz Co.,Ltd. | レンズブロッカー |
Also Published As
Publication number | Publication date |
---|---|
ES2047299T3 (es) | 1994-02-16 |
ES2014801A6 (es) | 1990-07-16 |
DE69004881T2 (de) | 1994-05-05 |
DE69004881D1 (de) | 1994-01-13 |
EP0409760B1 (fr) | 1993-12-01 |
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