EP4501539B1 - Anordnung für ein brillenglas-blockiersystem, kalibrierzylinder, verfahren zum kali-braten eines brillenglas-blockiersystems, verfahren zur herstellung eines brillenglases und computerprogrammprodukt - Google Patents

Anordnung für ein brillenglas-blockiersystem, kalibrierzylinder, verfahren zum kali-braten eines brillenglas-blockiersystems, verfahren zur herstellung eines brillenglases und computerprogrammprodukt

Info

Publication number
EP4501539B1
EP4501539B1 EP23189457.7A EP23189457A EP4501539B1 EP 4501539 B1 EP4501539 B1 EP 4501539B1 EP 23189457 A EP23189457 A EP 23189457A EP 4501539 B1 EP4501539 B1 EP 4501539B1
Authority
EP
European Patent Office
Prior art keywords
tilt angle
block nest
nest
calibration cylinder
block
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.)
Active
Application number
EP23189457.7A
Other languages
English (en)
French (fr)
Other versions
EP4501539A1 (de
EP4501539C0 (de
Inventor
Tim Greindl
Manuel Feldmeyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss Vision International GmbH
Original Assignee
Carl Zeiss Vision International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Zeiss Vision International GmbH filed Critical Carl Zeiss Vision International GmbH
Priority to EP23189457.7A priority Critical patent/EP4501539B1/de
Publication of EP4501539A1 publication Critical patent/EP4501539A1/de
Application granted granted Critical
Publication of EP4501539C0 publication Critical patent/EP4501539C0/de
Publication of EP4501539B1 publication Critical patent/EP4501539B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B24B13/005—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
    • 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
    • B24B13/0055—Positioning of lenses; Marking of lenses
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B24B47/225—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation for bevelling optical work, e.g. lenses
    • 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
    • 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 present invention relates to the field of manufacturing spectacle lenses. More precisely, the present invention relates to an arrangement for a spectacle lens blocking system configured for blocking a lens blank. Further, a method for calibrating a spectacle lens blocking system, a method of manufacturing a spectacle lens and a computer program product are provided.
  • the lens blanks are blocked to a blocking piece using a device or system, which may be referred to as a blocking device or blocking system, separate from the machining device for grinding or cutting the lens blanks.
  • Blocking the lens blank is necessary to fixate the lens blank in a defined position and in a mechanically resilient manner sustaining the milling or grinding process for individualizing the refractive power of the lens blank.
  • the blocking piece, to which a lens blank is blocked allows clamping the lens blank via the blocking piece in a form-fitting and/or force-fitting manner to the grinding or cutting machine.
  • the lens blank is attached to the blocking piece using a metallic alloy having a low melting temperature.
  • the lens blank is positioned relative to the blocking piece with the finished front surface of the lens blank facing the blocking piece such that the surface normal of the lens blank and the surface normal of the blocking piece are positioned in a predetermined angle, also referred to as tilt angle, relative to each other and the space in between the blocking piece and the front surface of the lens blank is filled with the liquid metallic alloy.
  • the space filled by the alloy may thus not only used for attaching the lens blank to the blocking piece but also for a defined variation of the geometry.
  • the tilt angle can be provided by tilting a block nest of the blocking system.
  • the block nest comprises a receptacle configured for receiving the blocking piece.
  • the blocking system can comprise an actuator for adjusting a tilt angle of the block nest. Different tilt angles of the block nest and thus of the blocking piece with respect to the lens blank can be provided. This provides an advantageous additional degree of freedom in the lens manufacturing process. In particular an appropriate tilt angle can facilitate the machining process of the back surface, thereby increasing the output, reducing cost and providing more flexibility in particular in the manufacturing of high-quality freeform lenses.
  • the blocking piece is typically chilled by a cooling device integrated into the blocking device to harden the metallic alloy and by this to fixate the lens blank to the blocking piece.
  • This blocking method may be carried out manually or in an automated manner. After the metallic alloy is hardened, the blocking piece and the lens blank attached to it may be removed from the blocking device.
  • the following manufacturing steps are typically carried out on the blocked lens blank: cutting the marginal contour of the spectacle lens, milling the intended refractive power into the back surface of the lens blank, polishing the milled surface by a polishing device, into which the blocked lens blank is inserted, and applying signature marks at the optical surface allowing an exact positioning of the optical surface.
  • the finished spectacle lens is removed from the blocking piece.
  • the metallic alloy is heated, molten and submitted to a recycling process.
  • WO 2022/162100 A1 discloses a blocking piece and method for vacuum blocking a lens blank.
  • EP 1738869 A1 discloses a spectacle lens manufacturing method and spectacle lens manufacturing system. This disclosure aims to reduce the types of blanks such as a semi-finished lens blank, materials, and processing time.
  • a spectacle lens design device disposed at a factory on a manufacturing side and a lens processing device connected thereto block an applicable semifinished lens blank or lens blank so that a reference surface thereof tilts at a predetermined angle using a numerical-control curve generator based on order information sent from an order terminal disposed at an spectacle store on an order-placement side, and form both surfaces of a plastic material so that a geometric center of an edge shape positions at a center of a circle of a circular lens to thereby satisfy an optical specification of the spectacle lens-related to the order, and next, the circular lens is processed to have the edge shape of the spectacle lens-related to the order to thereby obtain the spectacle lens-related to the order.
  • EP 1738869 A1 teaches that a lens blank can be blocked at a tilt angle with respect to the blocking piece, as shown therein in Fig. 9 .
  • EP 1738869 A1 teaches to perform a measurement of the lens tilt in blocked state, wherein in order to recognize the position (tilt) of the lens in the state fitted to the lens polishing device, the positions at predetermined three points at least of the surface or the rear surface of the lens are measured. Based on these at least three surface measurements of each lens the operation of the lens polishing device is adapted.
  • DE 20 2020 003 952 U1 relates to an attachment for a tool holder with integrated spirit level and DE4441548A1 describes an inclination sensor.
  • an arrangement for a spectacle lens blocking system configured for blocking a lens blank comprising:
  • a method for calibrating a spectacle lens blocking system with an arrangement comprising a block nest comprising a receptacle configured for receiving a blocking piece, wherein a tilt angle of the block nest is adjustable; and a calibration cylinder, wherein a contact surface of the of the calibration cylinder is adapted to a shape of the receptacle at least at a reference surface of the receptacle indicative of the tilt angle of the block nest, and wherein the calibration cylinder comprises an inclination sensor configured for determining the tilt angle of the block nest; the method comprising the steps of:
  • a method of manufacturing a spectacle lens comprising the steps of:
  • a computer program product comprising instructions which, when the program is executed by a computer, cause the computer to carry out the steps of
  • a machine-readable storage medium having stored thereon a computer program comprising program code means for carrying out the steps of the computer program product or one of its refinements.
  • obtaining data can refer to receiving or retrieving data provided by one or more sensors, even though the sensor hardware as such is not part of the claimed computer program product, and data processing can be performed by a computer according to instructions of the computer program product.
  • the inventors have recognized that even slight inaccuracies of a tilt angle of the block nest may lead to quality impairments of the manufactured spectacle lens. While such inaccuracies may have been tolerated in conventional spectacle lenses, it has been found that with modern-day high-accuracy freeform manufacturing equipment, an inaccuracy of the tilt angle of the block nest may no longer be a negligible contribution. Incorrect tilting of the block nest may result in a defect in the finished lens.
  • the inventors recognized that in order to provide highest quality spectacle lenses, a one-time calibration of the tilt angle of the block nest in the lens blocking system may not be sufficient. Hence, it would be desirable to provide an arrangement that allows time-efficient recalibrations during manufacturing.
  • the basic idea of an aspect of the invention is thus to provide an arrangement configured for use in a spectacle lens blocking system, wherein the spectacle lens blocking system is configured for blocking a lens blank, wherein the arrangement comprises: a block nest comprising a receptacle configured for receiving a blocking piece, wherein a tilt angle of the block nest is adjustable, for example with an actuator configured for adjusting the tilt angle of the block nest; and a calibration cylinder, wherein a contact surface of the of the calibration cylinder is adapted to a shape of the receptacle at least at a reference surface of the receptacle indicative of the tilt angle of the block nest, and wherein the calibration cylinder comprises an inclination sensor configured for determining the tilt angle of the block nest. Accordingly, instead of performing a tactile depth measurement with a depth gauge over a circumferential reference surface, the inventors suggest using a calibration cylinder comprising an inclination sensor.
  • An optical and color separated display may be used.
  • a correct calibration may thus be unambiguous.
  • a color may change to green if the difference of the tilt angle of the block nest determined by the inclination sensor of the calibration cylinder and a tilt angle of the block nest set by the actuator is below a predetermined accuracy threshold.
  • the accuracy threshold may be different for different series of spectacle lenses. For example, a higher degree of accuracy may be required for spectacle lenses with higher accuracy requirements.
  • the arrangement for the spectacle lens blocking system can comprise a second reference surface, wherein the second reference surface is a levelled reference surface, in particular having a tilt angle of 0°, configured for positioning the calibration cylinder on said second reference surface for a 0° tilt angle reference measurement for calibration of the inclination sensor.
  • the arrangement comprises a second reference surface that may also be referred to as static reference surface.
  • the calibration cylinder Prior to performing a calibration measurement of the actuator and block nest, the calibration cylinder may thus be positioned on said second reference surface to calibrate the inclination sensor of the calibration cylinder itself. Once the inclination sensor of the calibration sensor is calibrated in this manner it can be used for an even more accurate determination of the tilt angle of the block nest.
  • the second reference surface can be provided on the lens blocking system, in particular in close proximity of the block nest. This facilitates the handling.
  • Fig. 1 shows a first arrangement wherein the lens blank 10 is blocked to the blocking piece 20 in a horizontal orientation, i.e., with an inclination angle of 0°.
  • the blocking process may not only be used to establish a mechanical connection but can also be used to provide a defined geometry change, for example a tilt angle offset. All subsequent processing steps will thus depend on the position of the lens blank 10 and blocking piece 20 relative to each other.
  • Fig. 3 shows a schematic drawing of a section of a lens blocking system 1 with a block nest 30.
  • the block nest 30 comprises a receptacle 31 for receiving the blocking piece 20 and provides support for the blocking piece 20 during the blocking process. Accordingly, a lower surface 22 of the blocking piece 20 is placed on an upper surface of a support structure 32 of the block nest 30.
  • a ringshaped support structure 32 is provided that is adapted to provide support to the lower surface 22 of the blocking piece.
  • the tilt angle of the block nest 30 may preferably be adjusted in two different axes, for example an x-axis and a y-axis which are orthogonal to each other.
  • the lens blank (not shown in Fig. 3 ) is placed on a lens holder 35 of the lens blocking system 1 above the block nest 30 with the blocking piece 20.
  • a rim or other lens holder of the spectacle lens blocking system 1 may serve as a lens holder for the lens blank.
  • the lens holder 35 may have a static orientation and is not tilted.
  • the space formed between the lens blank 10 and the blocking piece 20, tilted by the block nest 30, can then be filled with the alloy 21 (see Fig. 2 ) for blocking the lens blank 10 at a desired orientation and angle on the blocking piece 20.
  • an inlet 36 can be provided via which the alloy is inserted for the lens blocking.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Eyeglasses (AREA)

Claims (14)

  1. Anordnung (2) für ein Brillenglasblocksystem (1), das zum Blocken eines Brillenglasrohling (10) ausgelegt ist, wobei die Anordnung umfasst:
    - ein Blocknest (30) umschließt eine Aufnahme (31) ausgelegt zum Aufnehmen eines Blockstücks (20), wobei ein Neigungswinkel des Blocknestes (30) einstellbar ist; wobei die Anordnung gekennzeichnet ist durch
    - einen Kalibrierzylinder (40), wobei eine Kontaktfläche (42) des Kalibrierzylinders an eine Form der Aufnahme (31) zumindest an einer Referenzfläche (32) der Aufnahme angepasst ist, die den Neigungswinkel des Blocknestes (30) angibt, und wobei der Kalibrierzylinder (40) einen Neigungssensor (43) umfasst, der zum Bestimmen des Neigungswinkels des Blocknestes ausgelegt ist (30).
  2. Anordnung nach Anspruch 1, wobei der Kalibrierzylinder so eingerichtet ist, dass er anstelle eines Blockstücks zur Kalibrierung in die Aufnahme des Blocknestes eingesetzt werden kann.
  3. Anordnung nach einem der vorhergehenden Ansprüche, wobei der Neigungssensor (43) zum Bestimmen des Neigungswinkels des Blocknestes (30) mindestens eines von einem Gyroskop oder einem Beschleunigungsmesser umfasst.
  4. Anordnung nach einem der vorhergehenden Ansprüche, wobei die Anordnung (2) einen Aktuator (50) umfasst, der zum Einstellen eines Neigungswinkels des Blocknestes (30) ausgelegt ist, insbesondere, wobei der Aktuator (50) zum Einstellen des Neigungswinkels des Blocknestes (30) in zwei verschiedenen Achsen ausgelegt ist.
  5. Anordnung nach Anspruch 4, wobei die Anordnung (2) dazu eingerichtet ist, eine Differenz zwischen dem vom Neigungssensor (43) des Kalibrierzylinders (40) bestimmten Neigungswinkel des Blocknestes (30) und einem vom Aktuator (50) eingestellten Neigungswinkel des Blocknestes (30) zu bestimmen.
  6. Anordnung nach Anspruch 5, wobei die Anordnung (2) dazu eingerichtet ist, einem Benutzer Anweisungen bereitzustellen, wie die Differenz zwischen dem vom Neigungssensor (43) des Kalibrierzylinders (40) bestimmten Neigungswinkel des Blocknestes (30) und einem vom Aktuator (50) eingestellten Neigungswinkel des Blocknestes (30) zu verringern ist.
  7. Anordnung nach einem der Ansprüche 4 bis 6, ferner umfassend eine Steuerung (60), wobei die Steuerung (60) mit dem Neigungssensor (43) des Kalibrierzylinders (40) und dem Aktuator (50) gekoppelt ist und wobei die Steuerung (60) dazu eingerichtet ist, den Aktuator (50) auf der Grundlage des Neigungswinkels des Blocknestes (30) zu steuern, der durch den Neigungssensor (43) des Kalibrierzylinders (40) bestimmt wird.
  8. Anordnung nach einem der vorhergehenden Ansprüche, umfassend eine Schnittstelle, insbesondere eine Anzeige (61), die so ausgelegt ist, dass sie den vom Neigungssensor (43) des Kalibrierzylinders (40) bestimmten Neigungswinkel des Blocknestes anzeigt.
  9. Anordnung nach Anspruch 8, wobei die Schnittstelle eine Anzeige (61) umfasst und wobei die Anzeige dafür ausgelegt ist, eine Differenz zwischen dem vom Neigungssensor (43) des Kalibrierzylinders (40) bestimmten Neigungswinkel des Blocknestes (30) und einem eingestellten Neigungswinkel des Blocknestes (30) anzuzeigen.
  10. Anordnung gemäß Anspruch 8 oder 9, wobei die Anzeige (61) so ausgelegt ist, dass sie (a) den vom Neigungssensor (43) des Kalibrierzylinders (40) bestimmten Neigungswinkel des Blocknestes (30) oder (b) die Differenz zwischen dem vom Neigungssensor (43) des Kalibrierzylinders (40) bestimmten Neigungswinkel des Blocknestes (30) und einem eingestellten Neigungswinkel des Blocknestes (30) als grafische Darstellungen in Form einer kreisförmigen Wasserwaage anzuzeigen.
  11. Anordnung nach einem der vorhergehenden Ansprüche, ferner umfassend eine zweite Referenzfläche (72), wobei die zweite Referenzfläche (72) eine nivellierte Referenzfläche ist, insbesondere mit einem Neigungswinkel von 0°, die zum Positionieren des Kalibrierzylinders (40) auf der zweiten Referenzfläche (72) für eine Referenzmessung mit einem Neigungswinkel von 0° zur Kalibrierung des Neigungssensors (43) ausgelegt ist.
  12. Verfahren zum Kalibrieren eines Brillenglasblocksystems mit einer Anordnung, umfassend ein Blocknest mit einer Aufnahme, die zum Aufnehmen eines Blockstücks ausgelegt ist, wobei ein Neigungswinkel des Blocknestes einstellbar ist; und einen Kalibrierzylinder, wobei eine Kontaktfläche des Kalibrierzylinders an eine Form der Aufnahme zumindest an einer Referenzfläche der Aufnahme angepasst ist, die den Neigungswinkel des Blocknestes angibt, und wobei der Kalibrierzylinder einen Neigungssensor umfasst, der zum Bestimmen des Neigungswinkels des Blocknestes ausgelegt ist; wobei das Verfahren die folgenden Schritte umfasst:
    - Einführen des Kalibrierzylinders in die Aufnahme des Blocknestes, wobei die Kontaktfläche des Kalibrierzylinders mit der Referenzfläche der Aufnahme in Kontakt steht, die den Neigungswinkel des Blocknestes angibt (S102);
    - Bestimmen des Neigungswinkels des Blocknestes unter Verwendung des Neigungssensors des Kalibrierzylinders (S103).
  13. Verfahren (200) zur Herstellung eines Brillenglases, wobei das Verfahren die folgenden Schritte umfasst:
    - Kalibrieren eines Brillenglasblocksystems gemäß dem Verfahren nach Anspruch 12;
    - Entfernen des Kalibrierzylinders nach Bestimmung des Neigungswinkels des Blocknestes (S204);
    - Blocken des Brillenglases mit dem Brillenglasblocksystem und Bearbeiten einer Oberfläche des Brillenglases (S205).
  14. Computerprogrammprodukt, umfassend Anweisungen, die bei Ausführung des Programms durch einen Computer den Computer veranlassen, die folgenden Schritte auszuführen:
    - Erhalten von Daten, die einen ersten Neigungswinkel eines Blocknestes einer Anordnung für ein Brillenglasblocksystem kennzeichnen, das zum Blocken eines Brillenglasrohlings ausgelegt ist, wobei das Blocknest eine Aufnahme umfasst, die zum Aufnehmen eines Blockstücks ausgelegt ist, wobei ein Neigungswinkel des Blocknestes einstellbar ist;
    - Erhalten von Daten, die einen zweiten Neigungswinkel des Blocknestes kennzeichnen, der durch einen Neigungssensor eines Kalibrierzylinders der Anordnung für ein Brillenglasblocksystem bestimmt wird, das zum Blocken eines Brillenglasrohlings ausgelegt ist, wobei eine Kontaktfläche des Kalibrierzylinders an eine Form der Aufnahme zumindest an einer Referenzfläche der Aufnahme angepasst ist, die den Neigungswinkel des Blocknestes angibt, und wobei die Kontaktfläche des Kalibrierzylinders mit der Referenzfläche in Kontakt steht, um die Daten zu erhalten, die den zweiten Neigungswinkel kennzeichnen;
    - Kalibrieren des ersten Neigungswinkels des Blocknestes auf der Grundlage des zweiten Neigungswinkels.
EP23189457.7A 2023-08-03 2023-08-03 Anordnung für ein brillenglas-blockiersystem, kalibrierzylinder, verfahren zum kali-braten eines brillenglas-blockiersystems, verfahren zur herstellung eines brillenglases und computerprogrammprodukt Active EP4501539B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23189457.7A EP4501539B1 (de) 2023-08-03 2023-08-03 Anordnung für ein brillenglas-blockiersystem, kalibrierzylinder, verfahren zum kali-braten eines brillenglas-blockiersystems, verfahren zur herstellung eines brillenglases und computerprogrammprodukt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23189457.7A EP4501539B1 (de) 2023-08-03 2023-08-03 Anordnung für ein brillenglas-blockiersystem, kalibrierzylinder, verfahren zum kali-braten eines brillenglas-blockiersystems, verfahren zur herstellung eines brillenglases und computerprogrammprodukt

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EP4501539A1 EP4501539A1 (de) 2025-02-05
EP4501539C0 EP4501539C0 (de) 2025-12-17
EP4501539B1 true EP4501539B1 (de) 2025-12-17

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4441548A1 (de) * 1993-11-22 1995-05-24 Asahi Optical Co Ltd Neigungssensor
DE202020003952U1 (de) * 2020-09-18 2020-10-09 Norman Lachs Aufsatz für Werkzeughalter mit integrierter Wasserwaage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19702287C2 (de) * 1997-01-23 1999-02-11 Wernicke & Co Gmbh Verfahren zum Ermitteln des Facettenverlaufs auf dem Rand von formzubearbeitenden Brillengläsern und zum Steuern des Formbearbeitens entsprechend dem ermittelten Facettenverlauf
EP1738869A4 (de) 2004-03-09 2010-10-27 Hoya Corp Brillenglas-herstellungsverfahren und brillenglas-herstellungssystem
MX2015008530A (es) * 2012-12-31 2015-09-10 Essilor Int Un metodo para determinar la posicion de bloqueo de una lente optica.
HUE066310T2 (hu) * 2018-08-10 2024-07-28 Essilor Int Eljárás optikai lencse optikai felületének megmunkálására
EP4035832A1 (de) 2021-01-28 2022-08-03 Carl Zeiss Vision International GmbH Blockierstück und verfahren zur vakuumblockierung eines linsenrohlings

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4441548A1 (de) * 1993-11-22 1995-05-24 Asahi Optical Co Ltd Neigungssensor
DE202020003952U1 (de) * 2020-09-18 2020-10-09 Norman Lachs Aufsatz für Werkzeughalter mit integrierter Wasserwaage

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EP4501539A1 (de) 2025-02-05
EP4501539C0 (de) 2025-12-17

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