WO2004015482A2 - Procede entierement automatisable de blocage de lentilles optiques - Google Patents

Procede entierement automatisable de blocage de lentilles optiques Download PDF

Info

Publication number
WO2004015482A2
WO2004015482A2 PCT/DE2003/002557 DE0302557W WO2004015482A2 WO 2004015482 A2 WO2004015482 A2 WO 2004015482A2 DE 0302557 W DE0302557 W DE 0302557W WO 2004015482 A2 WO2004015482 A2 WO 2004015482A2
Authority
WO
WIPO (PCT)
Prior art keywords
lens
blocked
block piece
casting material
lenses
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.)
Ceased
Application number
PCT/DE2003/002557
Other languages
German (de)
English (en)
Other versions
WO2004015482A3 (fr
Inventor
Andreas Simke
Dieter Rohr
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.)
Rodenstock GmbH
Original Assignee
Rodenstock 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 Rodenstock GmbH filed Critical Rodenstock GmbH
Priority to DE10392953T priority Critical patent/DE10392953B4/de
Priority to AU2003264244A priority patent/AU2003264244A1/en
Publication of WO2004015482A2 publication Critical patent/WO2004015482A2/fr
Publication of WO2004015482A3 publication Critical patent/WO2004015482A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B24B13/0052—Lens block moulding devices

Definitions

  • the present invention relates to a method for receiving or blocking optical lenses for further processing or handling operations.
  • Lenses have to be recorded in a defined manner for processing surfaces that have not yet been completed and / or the edge - “blocked” in technical jargon - in order to carry out the further processing operations correctly, ie in the correct position, in relation to the surface (s) that have already been completed can.
  • so-called blanks that is to say one-sided finished, tubular or pre-rimmed spectacle lenses.
  • the so-called recipe surface - usually the concave eye-side surface - according to the recipe data - spherical effect, toric effect, axis position, prism and, if necessary, addition in the case of multi-thickness or progressive recipe surfaces - is only produced when a specific order is available.
  • the spectacle lens is then edged according to the data of the frame in which the spectacle lens is to be inserted.
  • non-round glasses such as glasses with the smallest allowable block ring due to the minimization of the critical thickness, are manufactured, which means that the thin edge of such glasses sometimes protrudes very far and does not have sufficient support for grinding and polishing.
  • the transition from the block metal to the lens is particularly evident during further processing on the blocked surface, so that the surface may warp under certain circumstances.
  • Another major source of error is the alignment according to the marking or the engraving of the lenses to be blocked.
  • the markings are usually on the functional surface. According to the state of the art, these are viewed through the glass, so that there are parallax errors or imaging errors.
  • Another disadvantage of the prior art is that, in addition to the operator, some operators come into contact with the toxic, non-environmentally compatible block metal. By touching and breaking off the casting beads and by post-treating the reference surface, the expensive block metal is also carried over.
  • An imaging error is the offset of the optical center of the glass to the center line of the block piece. In the conventional block methods according to the prior art, imaging errors are generally always blocked.
  • the object of the present invention is to provide a method with which the disadvantages described are eliminated, and which can be automated, a correct placement of the block piece and a large-area contact of the casting material without the formation of cavities or the like. enables.
  • the method according to the invention for receiving or blocking optical lenses and in particular spectacle lenses for further processing steps shows the following process steps:
  • the lens is inserted into a receiving device in such a way that the surface on which the lens is to be picked up or blocked is above.
  • This insertion into the receiving device can be done by a positioning device, such as a manipulator or an industrial robot. No great demands are made on the accuracy of the manipulator, since the alignment is carried out by the receiving device.
  • the receiving device with the lens placed on it is positioned relative to a block piece which, after being positioned, is placed on the surface of the lens to be blocked and on which the lens is held in the respective processing devices during the subsequent processing steps.
  • the lens is preferably positioned relative to the block piece in a translatory and rotary manner, so that the setting of prisms, cylinder axes or other non-rotationally symmetrical features is also possible. It is further preferred if the block piece can only be displaced in one axis, the vertical axis, and the receiving device is aligned together with the lens relative to the block piece.
  • the block piece can be designed in a manner known per se, that is to say have a holder for conventional processing machines, which has an oriented
  • the block piece can be clamped together with the lens in the respective processing machine.
  • the block piece is provided with a passage opening.
  • a cuff is attached to the block piece and the lens in such a way that a casting space which is closed laterally by the cuff and downwards by the lens surface is formed, but is open at the top.
  • the cuff which is preferably a flexible cuff, is preferably put over the lens from above.
  • a casting material is poured into the casting space from above through the passage opening, which can be an alloy, such as a low-melting metal alloy or an alternative block metal, but can also be a wax.
  • the blocked lens is removed from the holding device and can then be used by means of the block piece in a processing device such as a grinding machine, a polishing machine, a milling machine, a lathe or a beveling machine.
  • a processing device such as a grinding machine, a polishing machine, a milling machine, a lathe or a beveling machine.
  • the sleeve lies against the edge of the lens, so that the casting material lies or adheres to the entire surface of the blocked surface of the lens. This gives you optimal support, especially when processing thin lenses.
  • the method according to the invention allows the blocking of lenses on both concave and convex surfaces.
  • a device suitable for carrying out the method according to the invention for centering and blocking a lens and in particular an eyeglass lens with a block piece thus has a sleeve between the block piece and the glasses, which is attached in such a way that a casting space is specified in which the
  • Casting material is filled.
  • the axis of rotation of the block piece can pass through the optical center of a progressive surface.
  • the method according to the invention is particularly suitable for the production of progressive prescription recipes.
  • the method can also be used for round and non-round lenses. This continues correct blocks in the production of prism, addition, tilt angle and axis position to increase the quality of the finished product.
  • the theoretical optical center, prism, addition, tilt angle and axial position of the glass can be positioned exactly according to the calculated values for the block piece. In this way, imaging errors are reduced or completely eliminated.
  • a lens for example a spectacle lens 1 is inserted into a receiving device 2, which enables alignment of the spectacle lens 1 both translationally and rotationally relative to a block piece 3 that can only be displaced in the vertical direction. This is shown in sub-images 1 and 2.
  • the alignment can preferably be carried out with a control and evaluation device (not shown) which evaluates the signal from a camera 4, which detects engravings and / or markings on the surface of the spectacle lens 1 to be blocked.
  • the X, Y and Z and the Rotation axes bring the spectacle lens 1 into the calculated position.
  • the holding device 2 can additionally be tilted by actuators.
  • the glass 1 Due to the freely positionable axes, the glass 1 can be brought into the correct position for receiving and locked for the placement of the block piece 3.
  • a flexible sealing sleeve 5 is put on from above, which limits the casting space for the material which connects the block piece 3 to the spectacle lens 1 for the further processing operations (partial picture 3).
  • the cuff 5 seals the casting space on the peripheral edge of the spectacle lens 1.
  • the flexibility of the sealing collar 5 ensures that both spherical and toric and progressive surface geometries are securely sealed. This prevents damage to the transition from the block metal to the lens.
  • the Alloy or other alternative media are filled in through the passage opening in block 3 (drawing 4).
  • the risk of handling the toxic block material is reduced. Subsequently, the sleeve 5 is removed, the Bril ⁇ lenglas 1 with the attached thereto block piece 3 can then be used in a processing machine (panel 5).

Landscapes

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

Abstract

Procédé de réception et plus précisément de blocage de lentilles optiques et en particulier de verres de lunettes pour de nouvelles étapes de traitement, telles que le traitement d'une surface non encore achevée et / ou le traitement du bord de la lentille. Ledit procédé consiste à installer la lentille sur un dispositif récepteur de manière telle que la surface contre laquelle la lentille doit être reçue ou bloquée se trouve en haut, à positionner le dispositif récepteur sur lequel la lentille est installée par rapport à un bloc placé sur la surface à bloquer de la lentille après le positionnement et contre lequel la lentille est maintenue lors des étapes de traitement suivantes, à placer un manchon sur le bloc pourvu d'une ouverture traversante et sur la lentille de manière telle qu'il en résulte un espace de coulée fermé vers le bas et latéralement, mais ouvert vers le haut, à introduire une matière de coulée par l'ouverture traversante dans l'espace de coulée et à enlever la lentille bloquée du dispositif récepteur après la solidification de la matière de coulée.
PCT/DE2003/002557 2002-07-29 2003-07-29 Procede entierement automatisable de blocage de lentilles optiques Ceased WO2004015482A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10392953T DE10392953B4 (de) 2002-07-29 2003-07-29 Vorrichtung zum vollautomatisierbaren Blocken von optischen Linsen und vollautomatisierbares Verfahren zum Blocken von optischen Linsen
AU2003264244A AU2003264244A1 (en) 2002-07-29 2003-07-29 Fully automatic method for blocking optical lenses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10234628A DE10234628A1 (de) 2002-07-29 2002-07-29 Vollautomatisierbares Verfahren zum Blocken von optischen Linsen
DE10234628.3 2002-07-29

Publications (2)

Publication Number Publication Date
WO2004015482A2 true WO2004015482A2 (fr) 2004-02-19
WO2004015482A3 WO2004015482A3 (fr) 2004-09-23

Family

ID=30128513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/002557 Ceased WO2004015482A2 (fr) 2002-07-29 2003-07-29 Procede entierement automatisable de blocage de lentilles optiques

Country Status (4)

Country Link
AU (1) AU2003264244A1 (fr)
CZ (1) CZ304718B6 (fr)
DE (2) DE10234628A1 (fr)
WO (1) WO2004015482A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004062848A1 (fr) * 2003-01-11 2004-07-29 Carl Zeiss Vision Gmbh Procede de centrage sans parallaxe d'un element optique et dispositif destine a la mise en oeuvre du procede
JP2009523484A (ja) * 2006-01-13 2009-06-25 ボストン サイエンティフィック リミテッド 配置固定デバイス
US9381604B2 (en) 2005-08-10 2016-07-05 Schneider Gmbh & Co. Kg Preformed block piece with three points of support
EP2300198B2 (fr) † 2008-05-09 2018-03-21 Satisloh AG Dispositif pour le glantage de pieces, en particulier de verres de lunettes, en vue de leur usinage et/ou de leur surfacage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017201288A1 (de) 2017-01-26 2018-07-26 Breitfeld & Schliekert Gmbh Verfahren zur Positionierung einer Linse

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383808A (en) * 1965-05-25 1968-05-21 Lunette De Paris Inc Lens block
US3451177A (en) * 1966-01-26 1969-06-24 Textron Inc Lens blocker
FR1541963A (fr) * 1966-11-10 1968-10-11 Univis Bloc de support pour la fabrication de lentilles ophtalmologiques et procédé de fabrication à l'aide de ce bloc
US3512310A (en) * 1966-11-10 1970-05-19 Univis Inc Two-piece ring block for lens blanks
US3996701A (en) * 1975-06-30 1976-12-14 American Optical Corporation Lens block with preform
US5505654A (en) * 1993-09-07 1996-04-09 Gerber Optical, Inc. Lens blocking apparatus
DE4442181C1 (de) * 1994-11-26 1995-10-26 Loh Optikmaschinen Ag Werkzeug zur Feinbearbeitung optischer Flächen
FR2733710B1 (fr) * 1995-05-03 1997-07-18 Essilor Int Pre-molette pour le glantage d'une lentille optique, et son procede de mise en oeuvre
IL132436A0 (en) * 1999-10-18 2001-03-19 Prolaser Ltd Automatic attachment of a finishing block to an ophthalmic lens

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004062848A1 (fr) * 2003-01-11 2004-07-29 Carl Zeiss Vision Gmbh Procede de centrage sans parallaxe d'un element optique et dispositif destine a la mise en oeuvre du procede
US7150528B2 (en) 2003-01-11 2006-12-19 Carl Zeiss Vision Gmbh Apparatus for positioning a semi-finished spectacle lens
US7306334B2 (en) 2003-01-11 2007-12-11 Carl Zeiss Vision Gmbh Method for positioning a semi-finished spectacle lens
US7611242B2 (en) 2003-01-11 2009-11-03 Carl Zeiss Vision Gmbh Method for centering a semifinished spectacle lens blank
US9381604B2 (en) 2005-08-10 2016-07-05 Schneider Gmbh & Co. Kg Preformed block piece with three points of support
JP2009523484A (ja) * 2006-01-13 2009-06-25 ボストン サイエンティフィック リミテッド 配置固定デバイス
EP2300198B2 (fr) † 2008-05-09 2018-03-21 Satisloh AG Dispositif pour le glantage de pieces, en particulier de verres de lunettes, en vue de leur usinage et/ou de leur surfacage

Also Published As

Publication number Publication date
DE10392953D2 (de) 2005-04-21
AU2003264244A1 (en) 2004-02-25
DE10234628A1 (de) 2004-02-12
DE10392953B4 (de) 2009-12-17
WO2004015482A3 (fr) 2004-09-23
CZ304718B6 (cs) 2014-09-10
AU2003264244A8 (en) 2004-02-25
CZ2005126A3 (cs) 2005-06-15

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