WO2004015482A2 - Vollautomatisierbares verfahren zum blocken von optischen linsen - Google Patents
Vollautomatisierbares verfahren zum blocken von optischen linsen Download PDFInfo
- 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
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
Description
Claims
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 (de) | 2004-02-19 |
| WO2004015482A3 WO2004015482A3 (de) | 2004-09-23 |
Family
ID=30128513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2003/002557 Ceased WO2004015482A2 (de) | 2002-07-29 | 2003-07-29 | Vollautomatisierbares verfahren zum blocken von optischen linsen |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU2003264244A1 (de) |
| CZ (1) | CZ304718B6 (de) |
| DE (2) | DE10234628A1 (de) |
| WO (1) | WO2004015482A2 (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004062848A1 (de) * | 2003-01-11 | 2004-07-29 | Carl Zeiss Vision Gmbh | Verfahren zur parallaxefreien zentrierung eines optischen elementes und vorrichtung zur durchführung des verfahrens |
| 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 (de) † | 2008-05-09 | 2018-03-21 | Satisloh AG | Vorrichtung zum blocken von werkstücken, insbesondere brillengläsern, für deren bearbeitung und/oder beschichtung |
Families Citing this family (1)
| 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)
| 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 |
-
2002
- 2002-07-29 DE DE10234628A patent/DE10234628A1/de not_active Withdrawn
-
2003
- 2003-07-29 AU AU2003264244A patent/AU2003264244A1/en not_active Abandoned
- 2003-07-29 DE DE10392953T patent/DE10392953B4/de not_active Expired - Fee Related
- 2003-07-29 WO PCT/DE2003/002557 patent/WO2004015482A2/de not_active Ceased
- 2003-07-29 CZ CZ2005-126A patent/CZ304718B6/cs not_active IP Right Cessation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004062848A1 (de) * | 2003-01-11 | 2004-07-29 | Carl Zeiss Vision Gmbh | Verfahren zur parallaxefreien zentrierung eines optischen elementes und vorrichtung zur durchführung des verfahrens |
| 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 (de) † | 2008-05-09 | 2018-03-21 | Satisloh AG | Vorrichtung zum blocken von werkstücken, insbesondere brillengläsern, für deren bearbeitung und/oder beschichtung |
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 (de) | 2004-09-23 |
| CZ304718B6 (cs) | 2014-09-10 |
| AU2003264244A8 (en) | 2004-02-25 |
| CZ2005126A3 (cs) | 2005-06-15 |
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