EP0916448A2 - Procédé et dispositif pour polir les deux faces de lentilles optiques - Google Patents

Procédé et dispositif pour polir les deux faces de lentilles optiques Download PDF

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Publication number
EP0916448A2
EP0916448A2 EP98119831A EP98119831A EP0916448A2 EP 0916448 A2 EP0916448 A2 EP 0916448A2 EP 98119831 A EP98119831 A EP 98119831A EP 98119831 A EP98119831 A EP 98119831A EP 0916448 A2 EP0916448 A2 EP 0916448A2
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EP
European Patent Office
Prior art keywords
workpiece holder
spindle
tool
lens
workpiece
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
Application number
EP98119831A
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German (de)
English (en)
Other versions
EP0916448B1 (fr
EP0916448A3 (fr
Inventor
Roland Mandler
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Optotech Optikmaschinen GmbH
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Optotech Optikmaschinen GmbH
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Publication date
Application filed by Optotech Optikmaschinen GmbH filed Critical Optotech Optikmaschinen GmbH
Publication of EP0916448A2 publication Critical patent/EP0916448A2/fr
Publication of EP0916448A3 publication Critical patent/EP0916448A3/fr
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Publication of EP0916448B1 publication Critical patent/EP0916448B1/fr
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    • 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
    • B24B13/0031—Machines having several working posts; Feeding and manipulating devices
    • B24B13/0037—Machines having several working posts; Feeding and manipulating devices the lenses being worked by different tools, e.g. for rough-grinding, fine-grinding, polishing
    • 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
    • B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools

Definitions

  • the invention relates to a method for bilateral Polishing an optical lens in which the lens is in arranged a first workpiece holder and on a first side is polished.
  • the invention further relates to a device for optical polishing on both sides Lenses.
  • Optical lenses are made through multiple grinding processes or other exciting machining methods transparent materials. It can happen are mineral glass or suitable plastics. To the above-mentioned shaping processes in any case, at least one polishing process closes with which the surface roughness of the lens is reduced so far that the light scattering at the Surface becomes negligible.
  • polishing is used of the lenses takes about twice as long as for the previous shaping processes. It is therefore a particularly important development goal Shorten polishing times. Because the actual polishing time where the polishing tool is engaged on the lens is not easily shortened due to the process reduction in non-productive times special meaning too.
  • the polishing machines have an overhead Swivel head that carries the tool spindle on its lower one End of the polishing tool - usually a molding tool - is attached.
  • the swivel head in turn is pivotable about the so-called B axis on one X carriage attached, the horizontal movements perpendicular to the B axis.
  • the polishing machine In the lower part the polishing machine is a Z-slide, which can move vertically and with the workpiece spindle vertical axis.
  • the axes of the tool spindle and workpiece spindle lie in a common plane, that is vertical on the B axis. Both spindles have their own drive that keeps them rotating can move.
  • Other axis divisions are natural just as possible as a swap from top to bottom below.
  • one of the two spindle axes be tilted when polishing.
  • This is done by swiveling the polishing machine aforementioned, overhead swivel head with it fastened tool spindle, which is at an angle stands.
  • the mold has about twice that Diameter like the lens that is attached to the tool will ensure that its edge does not cross the center of rotation of the Mold extends beyond.
  • the intersection of the two spindle axes with the Center of curvature of the lens coincide what after the tilting of the swivel head by moving the X slide and the Z slide can be reached can.
  • the molds are on the side when polishing lies against the lens, covered with a soft material.
  • the fine Contains solid particles, the desired material removal reached. If essentially when polishing only the surface roughness is reduced, so there is still a certain correction in the fine area the lens shape instead.
  • the Polishing tools must be worked very precisely and because of the wear and tear that occurs during polishing again and again reworked with a so-called dressing tool become. Previously, the workpiece holder of the workpiece spindle are removed so that the dressing tool could be attached to this spindle.
  • workpiece holders which are essentially consist of a hollow cylinder made of plastic, which is adapted in its inner diameter to the lens is so that it can be inserted into it.
  • the hollow cylinder usually has a rubber membrane that can be pressurized and then lies flat against the lens. This will pressed against the mold. Because of the special Properties and inaccuracies of the membrane this contact pressure between the lens and the mold seen above the surface with small irregularities afflicted. This is a disadvantage with the known devices for lens polishing that unfavorably on affects the lens accuracy.
  • the invention has for its object optical lenses less expensive and more precise to manufacture than this according to the prior art is currently possible.
  • This task is carried out in a method of the aforementioned Kind solved in that a second workpiece holder positioned opposite the first workpiece holder and the lens without turning into the second Pass the workpiece holder and from the side of the first workpiece holder on her other side is polished.
  • both sides of the lens are in one Machine polished.
  • the lens from the first workpiece holder without turning can be transported into the second workpiece holder.
  • the alignment of the lens to the machine be maintained with high accuracy. It is no tool change required because for the first Polishing a tool on one side of the lens can be kept ready while for polishing the second side a tool on the other side the lens is available. Since the two tools in the corresponding device can be present already positioned them there with high accuracy and are moved so that errors that occur in a Tool changes usually occur can be avoided can.
  • four spindles can be used be present, namely with two tool spindles Polishing tools and two combination spindles with combination tools, the workpiece holders and dressing tools included, or - in a second variant - there must be at least six spindles, namely two tool spindles with polishing tools, two workpiece spindles with workpiece holders and two dressing spindles with dressing tools.
  • the task is accomplished by a bilateral device Optical lens polishing solved with a first Tool block on which a first molding tool is arranged is, a second tool spindle on which a second molding tool is arranged, a first workpiece spindle with one workpiece holder and one second workpiece spindle with a second workpiece holder, the first mold in a working position relative to the first workpiece holder, the first workpiece holder in a transfer position relative to the second workpiece holder, in which the two Workpiece holders are aligned with each other, and the second workpiece holder in a working position are positionable relative to the second mold and the two molds on different sides of the lens.
  • This configuration ensures that the first Mold on which one side of the lens can act, to polish them while the second mold is on the other side of the lens can act to polish it.
  • the change between the two machining processes takes place in that the lens from the first Transfer the workpiece holder into the second workpiece holder becomes. Because the two workpiece holders here aligned to each other, the handover can take place without turning or turning the lens got to.
  • the molding tools can be done with high accuracy are positioned opposite the workpiece holders, because no tool changes are required.
  • the four-spindle version in the top and A tool and a combination spindle are also arranged in the lower part of the polishing machine.
  • the two combination spindles are in this case with the aforementioned Combination tool equipped that both a dressing tool, and also has a workpiece holder.
  • the two spindles below are on one Z-slide attached, which allows vertical movements, which also causes the spindles in this direction can be adjusted.
  • the Z slide in turn is attached to an X-slide, which allows horizontal movements perpendicular to the B axis to execute. This makes it possible to see the two below traversing spindles in the X and Z directions.
  • the two overhead spindles and the two spindles below A dressing spindle is also assigned as the third spindle. From the feed carriage or the swivel head then the attached three spindles in the same way as before with the four-spindle Machine described.
  • the two overhead spindles (tool and combination spindles) be attached to its own swivel head, so that they are independent of each other from the vertical position can be swung out.
  • the two spindles below (tool and Combi spindle) each attached to its own Z slide.
  • Each of these two Z-slides would be on one separate X-slide attached.
  • polishing slurry also emerges from the very fine gap between the lens and workpiece holder and arrives as desired, between the polishing surfaces of the mold and the surface of the lens to be polished.
  • the two molds are made one after the other dressed for what the swivel head from its zero position is swung out and by procedures in X - and Z axis either the combination tool (four spindle Execution) or the dressing tool of conventional design (six-spindle version) with the molding tool in Is brought in contact after both spindle drives were started.
  • the dressing process then runs, whereby very fine infeed movements in the Z direction become.
  • the polishing process then runs with an inclined Swivel head (with tool spindle and molding tool), after the lens and molding tool through process were brought into contact in the X and Z directions.
  • the from the annular gap between the workpiece holder and the lens emerging polishing suspension is distributed in ideally between the polishing surfaces of the mold and the lens surface.
  • a very significant advantage in the method according to the invention and the device for carrying out the method is that after the first side has been polished, the lens can be transferred from the first workpiece holder to the second workpiece holder without manual intervention, where the second side is then polished .
  • the suspension in the first combination tool with workpiece holder is first relieved of pressure and the tool and combination spindle are then moved apart in the Z direction.
  • the swivel head is then swiveled back to the zero position and the X and Z slide are moved so that the first combination spindle is arranged coaxially with the second, that is to say that the axis of the first workpiece holder coincides with the axis of the second workpiece holder and the almost touch the two workpiece holders, ie stand as close as possible to each other.
  • the lens is hydraulically pressed out of it and into the second workpiece holder.
  • the lenses on their polished on both sides on a single machine can be.
  • the investment costs are corresponding lower, since a second machine can be omitted.
  • the labor costs are significantly lower than for the State-of-the-art method since the Lens is polished on both sides without manual intervention and the shortest way from the first to the second workpiece holder arrives.
  • the lens when changing from the first Workpiece holder in the second can not be rotated must and no separate devices for this change required are.
  • the lens comes from the first in the second workpiece holder exclusively with the help of machine parts, devices and control elements, which anyway for lens polishing and regardless of this change are required.
  • the costs for the invention are correspondingly low Buffing machine which is a second buffing machine superfluous and also intermediate storage and Handling devices for changing the lenses saves.
  • the six-spindle polishing machine works in the same way and construction of the four-spindle shown here Machine. When running as a six-spindle Each machine would have the spindle for the dressing tool with the spindle for the workpiece holder on one common movement system.
  • Fig. 1 the machine is - highly schematic - as Overview.
  • Fig. 2 shows the transfer of the lens from the bottom Workpiece holder to the upper one.
  • Fig. 3 shows the main processing steps in eight phases are shown.
  • a machine frame (1) On a machine frame (1) is in the upper area Swivel head (2) pivoted about the B-axis (3).
  • the tool spindle I (4) is on the swivel head (2) attached to the die at its lower end I (5) for a convex lens surface.
  • a X-slide (8) mounted so that it has horizontal movements can run perpendicular to the B axis (3).
  • a Z-slide (9) is connected to the X-slide (8), which enables vertical movements and the combination spindle I (10) and the tool spindle II (11).
  • the combination tool is at the upper end of the combination spindle I (10) I (12) attached while at the top of the Tool spindle II (11) arranged the molding tool II (13) is.
  • the combination tool I (12) consists of a inner part, the dressing tool I (16), with the combination spindle I (10) is connected and an outer one Part, the workpiece holder I (14).
  • the combination tool II (7) consists of an internal one Dressing tool II (17) with the combination spindle II (6) is connected and one outside Workpiece holder II (15).
  • Fig. 2 shows how the lens to be machined (18) from the combination tool I (12) into the combination tool II (7) is transported.
  • the combination spindle I (10) first by procedure in the X axis exactly vertical under the combination spindle II (6) driven and then by moving the combination spindle I (10) in the Z axis reaches the workpiece holder I (14) and the workpiece holder II (15) almost touch.
  • the dressing tool I (16) and the dressing tool II (17) are on the one hand with the combination spindle I (10) and on the other connected to the combination spindle II (6) and carry the the respective workpiece holder I (14) and Workpiece holder II (15).
  • the lens (18) is initially in the workpiece holder I (14) of the combination tool I (12). she will by pressurizing the filled with polishing suspension inner cavity (19) of the combination spindle I (10) and the interior (20) of the combination tool I (12) by means of hydraulic force in the workpiece holder II (15) of the combination tool II (7) pressed. In this process, the inner Cavity (21) of the combination spindle II (6) and thus also the interior (22) of the combination tool II (7) relieved of pressure.
  • the lens (18) is thus in the polishing position for the second page.
  • a major advantage in the method according to the invention and the device for performing the method consists in the fact that the Leaking polishing suspension (18) is not harmful is, since the polishing process with plenty of addition anyway expires from polishing slurry.
  • This illustration shows the polishing of a lens (18) including dressing the mold I (5) and of the mold II (13) shown in eight phase images. For the sake of clarity, only those four spindles with the attached tools and the lens (18) drawn. Not shown in particular became the swivel head (2).
  • the lens (18) becomes the axis of the spindles involved placed at an angle to each other, the axis intersection at the center of curvature of the lens (18) or the molds (5) or (13) must lie.
  • Phase diagram 2 dressing mold I (5)
  • the workpiece holder was on the combination tool I (12) I (14) removed (manually or automatically) and thus the dressing tool I (16) is exposed.
  • the Swivel head (2) was placed at an angle and thus also the tool spindle I (4) with the molding tool I (5).
  • the dressing tool was made by moving in the X and Z directions I (16) in contact with the molding tool I (5) brought after the drives of the combination spindle I (10) and the tool spindle I (4) started in opposite directions were. By feeding the dressing tool I (16) in the Z direction becomes the desired material removal generated in the fine range.
  • Phase diagram 3 dressing mold II (13)
  • the workpiece holder was on the combination tool II (7) II (15) removed (manually or automatically) and thus the dressing tool II (17) is exposed.
  • the swivel head (2) was tilted in the other direction and thus also the combination spindle II (6).
  • the molding tool was in the X and Z directions II (13) in contact with the dressing tool II (17) brought after the drives for the combination spindle II (6) and the tool spindle II (11) in opposite directions were started.
  • By advancing the mold II (13) in the Z direction becomes the desired material removal generated in the fine range.
  • Phase image 4 insert the lens (18) in the workpiece holder I (14)
  • the workpiece holder was on the combination tool I (12) I (14) and on the combination tool II (7) the workpiece holder II (15) reattached (manually or automatically).
  • the swivel head was used for better handling (2) pivoted back to the zero position so that the axes of the tool spindle I (4) and the combination spindle II (6) stand vertically.
  • the combination spindle I (10) with the Workpiece holder I (14) moved into one position, which allows the lens (18) to be inserted (by hand or automatically).
  • Phase image 5 polishing the first, convex side from lens (18)
  • the swivel head (2) was tilted and thus also the tool spindle I (4) with the molding tool I (5).
  • the lens (18) in the workpiece holder I (14) Combi spindle I (10) in pressure-free contact with the Forming tool I (5) brought after previously the drives for the tool spindle I (4) and the combination spindle I (10) were started.
  • the lens (18) on the mold I (5) and from the annular gap between the lens (18) and the polishing suspension emerging from the workpiece holder I (14) ensures the desired material removal during polishing.
  • a feed movement of the machine spindle is not necessary because the lens (18) is from the polishing slurry steadily pressed towards molding tool I (5) becomes.
  • Phase image 6 transport of the lens (18) from the Workpiece holder I (14) in the workpiece holder II (15)
  • the swivel head (2) was again placed vertically and thus also the tool spindle I (4) with the molding tool I (5) and the combination spindle II (6) with the combination tool II (7).
  • the X-slide and the Z-slide were operated so that the combination spindle I (10) for Combined spindle II (6) is coaxially aligned, i.e. that the axis of the workpiece holder I (14) with the Axis of the workpiece holder II (15) coincides and the two workpiece holders (14) and (15) almost touch, i.e. at the smallest possible distance from each other stand.
  • Phase image 7 polishing the second, concave side the lens (18)
  • the swivel head (2) was tilted and thus also the combination spindle II (6) with the combination tool II (7) and the workpiece holder II (15), the the lens (18) carries.
  • the molding tool II (13) became unpressurized in the Z direction Bring contact with the lens (18) after previously the drives for the tool spindle II (11) and the combination spindle II (6) was started.
  • the polishing slurry over the inner cavity (21) the combination spindle II (6) into the interior (22) of the dressing tool II (17) and put under pressure.
  • the lens (18) is put on the mold II (13) on and out of the annular gap between the lens (18) and the workpiece holder II (15) emerging polishing suspension ensures the desired material removal during polishing.
  • Phase image 8 removal of the finished polished lens (18)
  • the swivel head (2) was in the zero position is pivoted back so that the axes the tool spindle I (4) and the combination spindle II (6) stand vertically.
  • the combination spindle I (10) By moving in the X and Z directions became the combination spindle I (10) and the tool spindle II (11) moved into a position in which the combination tool I (12) and the molding tool II (13) at removing (by hand or automatically) the lens (18) do not bother.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP98119831A 1997-11-14 1998-10-20 Procédé et dispositif pour polir les deux faces de lentilles optiques Expired - Lifetime EP0916448B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19750428 1997-11-14
DE19750428A DE19750428B4 (de) 1997-11-14 1997-11-14 Verfahren und Vorrichtung zum Bearbeiten von Linsen

Publications (3)

Publication Number Publication Date
EP0916448A2 true EP0916448A2 (fr) 1999-05-19
EP0916448A3 EP0916448A3 (fr) 2001-02-07
EP0916448B1 EP0916448B1 (fr) 2004-05-26

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EP98119831A Expired - Lifetime EP0916448B1 (fr) 1997-11-14 1998-10-20 Procédé et dispositif pour polir les deux faces de lentilles optiques

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US (1) US6155911A (fr)
EP (1) EP0916448B1 (fr)
DE (1) DE19750428B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10044872A1 (de) * 2000-09-12 2002-04-04 Optotech Optikmasch Gmbh Verfahren zum Polieren von optischen Linsen oder Spiegeln mit abbildenden Eigenschaften
EP1436119B2 (fr) † 2001-10-17 2008-08-13 Schneider GmbH + Co. KG Dispositif et procede pour l'usinage complet de lentilles optiquement actives sur les deux faces
WO2016058663A1 (fr) * 2014-10-15 2016-04-21 Satisloh Ag Dispositif d'usinage fin de surfaces optiquement actives en particulier de verres de lunettes

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Publication number Priority date Publication date Assignee Title
DE19800841C2 (de) * 1998-01-13 2001-07-19 Optotech Optikmasch Gmbh Verfahren zum gleichzeitigen Polieren von mindestens zwei optischen Linsen und Vorrichtung zur Durchführung des Verfahrens
JP4288012B2 (ja) * 2001-01-05 2009-07-01 株式会社ニデック 眼鏡レンズ加工装置
CN1324330C (zh) 2001-05-09 2007-07-04 浜松光子学株式会社 光学透镜母材、光学透镜以及光学透镜的制造方法
JP2004261954A (ja) * 2003-02-14 2004-09-24 Seiko Epson Corp 研磨方法
US20050202754A1 (en) * 2003-05-16 2005-09-15 Bechtold Mike J. Method, apparatus, and tools for precision polishing of lenses and lens molds
DE102004051155A1 (de) * 2004-10-21 2006-04-27 Carl Zeiss Ag Aufnahmevorrichtung für ein optisches Element
DE102006028164B4 (de) * 2006-06-16 2009-04-02 Satisloh Ag Schleif- und Poliermaschine zum Schleifen und/oder Polieren von Werkstücken in optischer Qualität
DE102007042667A1 (de) * 2007-09-10 2009-03-12 Schneider Gmbh & Co. Kg Poliermaschine für Linsen und Verfahren zum Polieren einer Linse mit einer Bearbeitungsmaschine
CN101269473B (zh) * 2008-04-30 2010-06-02 嘉兴蓝特光学有限公司 用于圆形球面光学透镜定中心的方法
JP5453459B2 (ja) * 2010-01-29 2014-03-26 有限会社コジマエンジニアリング 皿形砥石を用いたレンズ球面の研削加工方法
DE102012216724A1 (de) 2012-09-19 2014-03-20 Carl Zeiss Vision International Gmbh Verfahren und Vorrichtung zur Polierbearbeitung von Brillenlinsen und Gießformen für die Brillenlinsenherstellung sowie entsprechendes Verfahren zur Herstellung von Brillenlinsen und Gießformen für die Brillenlinsenherstellung
CN103659516B (zh) * 2013-12-06 2017-01-11 上海新跃仪表厂 一种用于弯月透镜定中心的磨边方法
DE102014003598B4 (de) * 2014-03-17 2020-02-27 Satisloh Ag Vorrichtung zum Schleifen, Feinschleifen und/oder Polieren von Werkstücken in optischer Qualität, insbesondere von sphärischen Linsenflächen in der Feinoptik
EP3135431B1 (fr) * 2014-04-25 2021-02-24 Kojima Engineering Co., Ltd. Procédé de centrage de lentille destiné à une machine de traitement à centre sphérique, procédé de traitement de lentille et machine de traitement à centre sphérique
CN104275638B (zh) 2014-09-22 2016-10-19 广东省自动化研究所 自动抛光系统及其抛光方法
DE102016006791A1 (de) 2016-06-07 2017-12-07 Satisloh Ag Maschine zur Bearbeitung von Werkstücken in optischer Qualität
DE102020128088B3 (de) 2020-10-26 2022-04-14 Optotech Optikmaschinen Gmbh Verfahren zum Feinschleifen oder Polieren einer optischen Linse auf einem Werkstückträger
DE102020008132A1 (de) 2020-10-26 2022-04-28 Optotech Optikmaschinen Gmbh Werkstückträger zur Festlegung an einer ersten Linsenfläche einer optischen Linse

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DE3429408A1 (de) * 1983-09-02 1985-03-21 Essilor International Cie Générale d'Optique, Créteil Verfahren und vorrichtung zur oberflaechenbehandlung einer optischen linse
DE3626324A1 (de) * 1986-08-02 1988-02-04 Pittler Ag Maschf Doppelspindel-drehmaschine
JPH07299720A (ja) * 1994-04-27 1995-11-14 Olympus Optical Co Ltd 研削方法および装置
EP0727280A1 (fr) * 1995-02-14 1996-08-21 Opto Tech GmbH Procédé et appareil pour polir des lentilles sphériques

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10044872A1 (de) * 2000-09-12 2002-04-04 Optotech Optikmasch Gmbh Verfahren zum Polieren von optischen Linsen oder Spiegeln mit abbildenden Eigenschaften
DE10044872C2 (de) * 2000-09-12 2003-03-20 Optotech Optikmasch Gmbh Verfahren zum Polieren von optischen Linsen oder Spiegeln mit abbildenden Eigenschaften
EP1436119B2 (fr) † 2001-10-17 2008-08-13 Schneider GmbH + Co. KG Dispositif et procede pour l'usinage complet de lentilles optiquement actives sur les deux faces
WO2016058663A1 (fr) * 2014-10-15 2016-04-21 Satisloh Ag Dispositif d'usinage fin de surfaces optiquement actives en particulier de verres de lunettes

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Publication number Publication date
US6155911A (en) 2000-12-05
EP0916448B1 (fr) 2004-05-26
DE19750428A1 (de) 1999-06-02
EP0916448A3 (fr) 2001-02-07
DE19750428B4 (de) 2007-06-21

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