EP1436119B1 - Device and method for complete machining of lenses that are optically active on two sides - Google Patents

Description

The invention relates to a device for Editing a two-sided optically active lens with a Cutting, milling, and / or a polishing unit for Edit at least a first side of the lens and a Method for editing a two-sided optically active Lens with a cutting, milling and / or a Polishing unit for processing at least a first page the lens, the lens being over a second side associated first holding device is held.

In the previously known methods, a lens blank used in plastic or glass, one or the first Page already identifies the final optically effective form. For eyeglass lenses, this is the front, ie the eye opposite side, which is usually a spherical surface forms. Such lens blanks are in gradations with respect to the radii of curvature of the spherical surface stored. For grinding toric processing of rear surface or second side becomes the lens blank blocked, that is, with the front surface or first Side attached to a block piece that fits into the chuck a lens grinding machine is clamped.

For the production of an individual lens attached to the adapted to multiple eye defects of a particular person is, the front or first page is usually by means of a machining process with an individual Provided progressive surface. Under a progressive surface one understands an area, which in partial ranges of a symmetrical - usually spherical - footprint deviates so that a progressive lens with near and Far-sighted areas and the corresponding Transition areas arises. To compensate for certain It is also necessary that the base area the front surface or first side opposite to the tilted rear surface or second side, offset and / or phase-twisted.

The lens blank is used to produce the progressive surface previously with the rear surface on a block piece by means of attached to a metallic paste. The so blocked Lens is for editing in the head of a Clamped workpiece spindle. Because the lens blank is attached directly to the block piece, the Tilting, the offset and / or the phase angle during Blocking is taken into account by the lens blank inclined or offset is attached to the block piece. Thereby The blocking takes a long time. Also, this is for this a separate machine needed. Despite all care result from this additional step certain, unavoidable inaccuracies.

There is already a machine for making lenses EP 0 849 038 A3. The machine has this via a cutting unit and a polishing unit for Edit a page of a lens. A Complete machining of the lens on both sides is not intended.

From the US PS 5,205,076 a method is known in also when editing the first page of the Lens blanks for a plastic contact lens lateral surface is worked out. Obviously, the axis of the lateral surface agrees with the Work spindle axis coincide, which in the recording of the Lens blanks in a holding device for editing the second side no tilting of the lens blank, so that the method is not suitable, in a simple way Produce lenses in which the optical axes of both Pages do not coincide.

From EP 0 868 972 a method and a device for the Two-sided machining of optical lenses known, in which the blanks a clamping paragraph exhibit.

The invention is based on the object, a device and to form and design a method such that a complete machining of the lens on both sides is guaranteed.

The object is achieved erfindungagemäß by an apparatus according to claim 1.

It is also advantageous for this that the transformer unit a second holding device for the lens, and the Lens via at least one positioning feature relative to the second holding device is storable, wherein the Positioning feature a reference to the first and / or to the second side of the lens to their orientation. The reference between the positioning feature and the first Side is used to align the lens in the second Holding device with respect to an optical axis of first page. The positioning feature is activated during editing the first page in the same Clamping generated. As a positioning feature can also first side or the first holding surface or the supporting part, used to edit the first page used become. The relation between this first holding surface or the support member to the first page is given. The reference between the first page and the second page is anyway available. The support member is then after tightening by removed the second holding device. As second Holding device or for re-clamping can also be Robot arm can be used.

Furthermore, it is advantageous that the position feature as Reference surface is formed, wherein the reference surface with respect to an optical axis of the first side and / or the second side is aligned. The Reference surface is in this case a part of the edge of the lens, which are after editing the first side of the lens remains. With or after editing the second page this reference surface is removed. Beside the one Reference surface is also a second reference surface of Advantage, which also coincides with the machining process of first side of the lens is made. The second Reference surface can be used as side or lateral surface of the lens be formed and is perpendicular to the reference surface, ie substantially parallel to the optical axis of the first Side and / or the second page arranged. As Side surface formed reference surface provides in optimal case the later outer surface of the lens for a Version, d. h the lens does not need to be retrofitted Go through edge processing. As a positioning feature is also the first holding surface or the support part, the Editing the first page is used or the axis position of the Robot, which fixes the lens position, usable.

It is also advantageous that the second holding device at least two holding parts, each with at least one, at least one reference surface associated plant having. The uniform training of the plant and the holding part ensures accurate positioning of the Lens without additional reference between the plant and the Holding part. The attachment of the lens holder is as Counter surface to the annular surface or reference surface of Lens blanks formed and extends perpendicular to Workpiece spindle axis.

According to a preferred embodiment of solution according to the invention is finally provided that one engageable with the first side of the lens Support member is provided, wherein the support member to the first side of the lens applied plastically and / or having elastically deformable surface and the Surface formed of binder and / or filler and / or is curable. Thus, a support of the lens given the editing of the second page guaranteed. The hardening of the surface or the Adhesive ensures a pretension-free edition of Lens and thus a reproducible processing of second page.

It is also advantageous that a device for Signing and / or marking the lens is provided. This is the positioning of the lens in its later Recording within a component, such as a Glasses frame, guaranteed. The signing takes place either in a cutting unit by a tool and / or in a transformer unit by a laser. In addition, the marking also serves to position the Lens relative to the holding device, if the cover by the Umspannvorrichtung not guaranteed when re-tightening becomes.

In addition, it is advantageous that a washing and / or Flushing device is provided for the lens. The first Side of the lens can thus be before re-clamping and the finished machined lens to be cleaned before removal. The Washing and / or rinsing device is here in one Polishing unit provided.

Furthermore, it is advantageous that the reference surface orthogonal or parallel to the optical axis of the first Side and / or the second side of the lens is arranged. The orthogonally arranged reference surface serves the vertical orientation, with the parallel arranged Reference surface determines the radial position of the lens. It is Also possible, the orientation of the lens in vertical and to ensure in the radial direction over a molding surface.

The problem is solved by claim 11. The necessary inclination or the respectively necessary offset of the lens blank when editing the second page is obtained accordingly a working out a Spannabsatzes whose axis opposite the optical axis of the first optical surface tilted and / or offset, so the turned Lens blank tilted and / or offset clamped can. The second surface is now edited, with its optical axis coincides with the workpiece spindle axis. As a result, the leadership of the tool is essential simplified; this just needs to follow a lane, which follows in the main the symmetrical base. Elevations or depressions that the progressive surface define only a small deviation that can be easily included in the trajectory.

Overall, this results in smaller strokes of the tool in the axial direction, as if in addition to the tilt or an offset would have to be worked out. Both Procedure is thus common that on the time-consuming, need an additional machine and quite with Errors afflicting blocking can be dispensed with.

If in the description of the invention of an optical Axis of a progressive surface is the talk, so is it an axis meant the mean curvature of the Progressive surface describes and is on the optical axis oriented to the underlying symmetric base.

As explained, the clamping shoulder has a cylindrical Lateral surface and a perpendicular thereto annular bearing surface on. The lateral surface is of Pliers or holding parts of a lens holder or Detected holding device to the lens blank rotation with the bearing surface on the plants of the Holding parts rests. Because the normal of the bearing surface is tilted relative to the blank axis and the upper Termination or the installation of the holding parts or their attachment in a direction perpendicular to the workpiece spindle axis Counter surface is the lens blank is with a with respect to the workpiece spindle axis tilted axis in the Lens holder held.

The main surface axes of the two sides must be together be correlated. This can also with the clamping paragraph with be taken into account by adding a phase marker to the a corresponding counter mark on the lens holder cooperates mechanically or optically, in the clamping paragraph is incorporated. This allows the turned Lens blank in phase with the lens insert, so that the control, the relative position the workpiece spindle to the machining tool knows, so also information about the phase alignment of the Lens blanks receives and thus a phase-matched Edit the second page can cause.

Because of the tilting of the axis of the lateral surface arise on one side of the lens undercuts, allowing to generate of the clamping paragraph is worked with a turning tool, the discontinued or cranked towards the blank axis.

When editing the first page will also be a or several line markings or signatures incorporated, which make it possible for the processing of second side, the angular position of the two optical surfaces to adjust and control each other. Such Line markings, also called signatures, are also attached on the second page. The stroke marks contain particular information about the location of the Major and minor axes of the lens base. marks on both sides are predominantly for one Edge processing of spectacle lenses needed, the must be used accurately in spectacle frames.

The object is also achieved by a method according to claim 12. The positioning feature can also be incorporated as a phase marker in the clamping paragraph, so that a phase-exact insertion of the turned Lens blanks is possible.

The polishing includes besides the usual mechanical and chemical processing a finest diamond machining or the processing without additives, only with water. hereby Minimal cutting marks are revised or removed.

This is possibly a on the second side of the lens for Processing of the first side arranged receiving adapter detached from the second side of the lens and the second side the lens is passed through the cutting and / or polishing unit processed.

If by means of the cutting process no further Positioning feature is formed, the first page or serves the first receiving surface or the support member for processing the first page as a position feature for editing the second page.

Finally, it is beneficial that the lens goes through Holding parts of the second holding device in the radial Direction is stretched, with the reference surface trained positioning feature of the lens with at least a holding part or a system of the holding part to the plant is brought. The plant is punctiform, formed linear or flat, so that the Reference surface can be applied.

It is also advantageous for this that the reference surface perpendicular or parallel to an optical axis of the lens is arranged and on the first side a support member for Plant is brought. The support member has a plastic-elastic Surface hardened after application so that the lens is tension-free.

Ultimately, it is advantageous that a mark and / or Signing for later aligning the lens on the first Page and / or placed on the second page or is incorporated, wherein after editing the first Side a protective layer or a protective film on this is arranged. The signing can be done by a Laser done immediately before the re-tightening or with the cutting or milling process. In addition to the simplified later positioning of the lens in the component or Spectacle frame serves the marking in addition also the Positioning the lens relative to the holding device, provided the reference by the transformer in the Repositioning is not guaranteed. By the signing the phase of the lens becomes relative to another Lens or relative to the glasses frame or the Guaranteed transformer.

It is also advantageous that the lens after editing the first page or after polishing and before Wash the protective layer or the protective film washed is and the first page and / or the second page with a coating is provided. Because of practical reasons the coating on both sides is larger at once Importance.

Finally, it is beneficial that the lens after the Edit the first page and remove it from the first one Holding device through the jaws of the second Holding device is held. Thus, the relative position the lens to the first holding device of the System control on the second holding device transferable. The use of signatures and / or Markings can be omitted.

For this purpose, it is advantageous that the lens after the Edit the first page of a capture adapter is resolved and / or after editing the second page is released from a support member. This ensures the Processing or completion of the lens after the respective processing step.

After all, it is beneficial that before or after Coating a border processing for later Positioning and fixing of the lens on the spectacle frame he follows. By edge processing after coating become critical coating sites in the edge area removed and special mounting options through Form rounds, grooves and drilling the lens for attachment produced on the spectacle frame.

Figur 1

eine Prinzipskizze einer Linse mit Aufnahmeadapter an der zweiten Seite;

Figur 2

eine Prinzipskizze einer Linse mit Stützteil und Klemmbacken;

Figur 3

eine Prinzipskizze einer Komplettbearbeitungseinheit mit einer Schneid- und/oder Fräseinheit, einer Poliereinheit und einer Umspanneinheit;

Figur 4-9

die aufeinander folgenden Schritte bei der Herausarbeitung einer Linse aus einem Linsenrohling.

Further advantages and details of the invention are explained in the patent claims and in the description and illustrated in the figures. It shows:

FIG. 1

a schematic diagram of a lens with receiving adapter on the second side;

FIG. 2

a schematic diagram of a lens with support member and jaws;

FIG. 3

a schematic diagram of a complete processing unit with a cutting and / or milling unit, a polishing unit and a transformer unit;

Figure 4-9

the successive steps in the elaboration of a lens from a lens blank.

The lens 1 shown in Figure 1 has a optically active first page 1.1 and one too editing second page 1.2. According to FIG the lens 1 via a receiving adapter 6 and a Spigot 6.1 with a not shown Workpiece spindle of a cutting, milling unit 7 connected. In a not shown Embodiment is the cylindrically shaped Lens added directly to the tool spindle.

The lens 1 is according to Figure 1 on the Adhesive adapter 6 glued, so the first Page 1.1 of the lens 1 can be edited. Next the generated lens shape of the first page 1.1 with the resulting optical axis 1.3 points the lens 1 also has a reference surface 4.1, the is arranged orthogonal to the optical axis 1.3. The reference area 4.1 is part of the still protruding material of the former raw lens 1, that according to Figure 2 in another Processing step to the second side 1.2 of the lens 1 is processed. In addition to the reference surface is 4.1 a side surface 4.2 provided perpendicular to Reference surface 4.1 is arranged and also a Reference to the optical axis 1.3 has.

According to Figure 2, the lens 1 is arranged rotated, so that already edited first page 1.1 of Lens 1 by two jaws 3.1, 3.2 a second Holding device 3 a transformer unit 2 was added can be. The second page 1.2 is now according to Figure 2 upwards and the receiving adapter 6 is away. The second page 1.2 is in this position freely accessible and can be edited. The relative position of the lens 1 to not shown Workpiece spindle of Figure 1 and the relative Position of the lens 1 to the holding part 3.1 are here maintained.

The lens 1 rests with the reference surface 4.1 Annex 3.3 or Annex 3.3 'of the jaw 3.2 or the jaw 3.1 and is thus the optical axis 1.3 of the first page 1.1 after aligned. The optical axis 1.3 now runs approximately parallel to a not shown Tool spindle or parallel to the side surface 4.2 the first page 1.1. The side surface 4.2 is used here for determining the position relative to the radial Alignment of the lens 1. Over the side surface 4.2 is the lens 1 through the jaws 3.1, 3.2 in held radial direction.

To support the lens 1 for the purpose of processing the second side 1.2 a support member 5 is provided which is a curable surface 5.1, such as a Adhesive, has. The support member 5 is over a Spigot 5.2 with a not shown Tool spindle connected. The surface is 5.1 this elastic-plastically deformable and can for Bracing the lens 1 through the jaw 3.1 of down against the lens 1 and the first page 1.1 be created or pressed. The surface 5.1 thus adapts to the geometry of the first page 1.1 the lens 1 and provides after curing enough support.

According to Figure 3 has a Complete processing unit 10 for a Cutting, milling unit 7, an adjoining Polishing unit 8, a transformer unit 2 and a Coating unit 9 on. After editing the first page 1.1 in the cutting, milling unit 7 becomes passed the lens to the polishing unit 8. To the polishing is the lens 1 in the polishing unit. 8 washed, via the transformer unit 2 according to Figure 1, 2nd rotated and to the cutting or milling unit 7 for Processing of the second page 1.2 submitted. After that becomes the second side 1.2 in the polishing unit 8 polished and washed. In the transformer unit 2 is the lens 1 after editing the first page 1.1 from the receiving adapter 6 or after editing the second side 1.2 released from the support member 5 and held by the jaws 3.1, 3.2.

Alternatively, after washing a unit or a Station for coating the lens 1 with a Protective layer or a protective film such as a Plastic film provided so that the surface the already edited first page 1.1 during the Editing through the second page 1.2 not ödamaged.

After cutting or milling and polishing the first page 1.1 and / or the second page 1.2 becomes the lens in the transformer unit 2, for example, with Signed a laser and / or to the Coating unit 9 passed, which they then completely processed leaves.

FIG. 4 shows a cylindrical lens blank 1 with a first page 1.1 and a second page 1.2, both perpendicular to the blank axis 1.4 extend. The lens blank 1 is in one Holding parts or pliers 3.1, 3.2 having Lens holder 3 a not shown Clamped workpiece spindle, so that the Blank axis 1.4 with the workpiece spindle axis matches.

According to FIG. 5, the optically active surface is first of all the first page 1.1 with a turning tool 11 worked out. In the simplest case, it is at the optically active surface 1.1 to a spherical Surface whose optical axis 1.3 with the Blank axis 1.4 matches. But here too can already be produced a progressive surface, wherein the optical axis 1.3 the axis of the base of the Is progressive. The processing is done with a rapidly rotating workpiece spindle, wherein the turning tool 11 according to the rotation of the Workpiece spindle in the axial direction up and down is moved while slowly in the radial direction is adjusted. Thus the acceleration of the Tool is not too large in the axial direction, can use the rotational movement or rotation in areas large changes in the local curvatures, if necessary be slowed down. The workpiece spindle axis is thus a controlled, i. phase-controlled axis.

According to Figure 6 is in the same restraint Spannabsatz 4 generated. This consists of a circumferential stage 4.3 with a lateral surface 4.2 and a perpendicularly extending annular surface 4.1. It is crucial that the clamping paragraph 4 opposite the blank axis 1.4 and thus against the optical axis 1.3 of the optically active surface 1.1 the first side is tilted, i. that the Surface normal of the ring surface 4.1, that is the Axis 12 of the clamping shoulder, opposite these axes is tilted. Basically, the level 4.3 can also additionally offset to the optical axis 1.3 be formed. To work out the level 4.3 to be able to become laterally offset Turning tool 11 used to cover the areas as well to be able to edit, which is as an undercut represent.

The processing of the first page 1.1 of the Lens blanks 1 is thus completed. He will now taken from the clamping and turned and with the first page 1.1 down again in phase with Help of a phase marker in the form of a Line marking used in the clamping. On such a mark can be dispensed with if the re-clamping is controlled, that is when the Phase angle of the lens 1 to the spindle is known and by the controlled movement of the transfer tool 3 this information is not lost, so that the turned lens 1 again in phase in the Chuck of a phase-controlled spindle used becomes. It is - as shown in the figure 7 - the Lens blank 1 detected at the stage 4.3, wherein the Pliers 3.1, 3.2 of the lens holder 3 the Capture the lateral surface 4.2 and the lens blank 1 hold against rotation. At the same time lies the Ring surface 4.1 on the upper end of the Pliers 3.1, 3.2 on, so that the blank axis 1.4 is tilted relative to the workpiece spindle axis. The now lying on the second page 1.2 of the Lens blanks 1 is tilted relative to the Workpiece spindle axis.

According to FIG. 8, the upper second one will now be shown Page 1.2 to a progressive surface, that is the second optical surface 1.2, edited, with their optical axis 1.4 with the workpiece spindle axis coincides and thus with respect to the optical Axis 1.3 of the first page 1.1 tilted and possibly is offset.

Thus the angular alignment of the two optical Areas 1.1, 1.2 has the desired dimension, can at the Editing the first page 1.1 one Line marking are generated at the Processing of the second page 1.2 Consideration place. Before the cutting process begins, the Lens blank 1 based on the line marking aligned. It also forms the starting point for editing the second page 1.2.

As soon as the second page 1.2 is edited, too the resulting from the lens blank 1 lens of Lens receptacle 3 removed and a border processing performed, wherein at least the material area, shown here hatched twice, the the Ring surface of the clamping forms, is removed.

LIST OF REFERENCE NUMBERS

1

lens

1.1

first page, first optical surface

1.2

second side or optical surface, progressive

1.3

optical axis

1.4

optical axis, blank axis

2

reclamping

3

second holding device, lens holder, Umsetzwerkzeug

3.1

Holding part, jaw, pliers

3.2

Holding part, jaw, pliers

3.3

Plant, counter surface

3.3 '

Plant, counter surface

4

clamping shoulder

4.1

Positioning feature, reference surface

4.2

Side surface, lateral surface

4.3

step

5

supporting part

5.1

surface

5.2

spigot

6

receiving adapter

6.1

spigot

7

Cutting, milling unit

8th

polishing unit

9

coating unit

10

Complete machining unit

11

lathe tool

12

Axis of the clamping shoulder

Claims (21)

1. A device for the machining of a bilaterally optically active lens (1) with a cutting, milling (7) and/or a polishing unit (8) for the machining of at least a first side of the lens, whereby there is provided a first holding device for the clamping of the lens (1) and a reclamping unit (2) for the reclamping of the lens (1) from the first side (1.1) onto the second side (1.2) for the purpose of machining the second side (1.2) of the lens (1), characterised in that a second holding device (3) is provided for the lens (1) and designed in such a way that the lens (1) can be mounted with respect to its axial position via at least one positioning feature (4) relative to the second holding device (3).
2. The device according to claim 1, characterised in that the positioning feature (4) has a reference to the first side (1.1) and/or to the second side (1.2) of the lens (1) and/or to their alignment.
3. The device according to any one of the preceding claims, characterised in that the positioning feature (4.1) is designed as a reference face (4), whereby the reference face (4) is aligned with respect to an optical axis (1.3, 1.4) of the first side (1.1) and/or of the second side (1.2).
4. The device according to any one of the preceding claims, characterised in that the second holding device (3) has at least two holding parts (3.1, 3.2) each with at least one seating (3.3) assigned to a least one reference face (4).
5. The device according to any one of the preceding claims, characterised in that a supporting part (5) is provided which can be brought into contact with the first side (1.1) of the lens (1).
6. The device according to any one of the preceding claims, characterised in that the supporting part (5) has a plastically and/or elastically deformable surface (5.1) which can be placed onto the first side (1.1) of the lens (1).
7. The device according to any one of the preceding claims, characterised in that the surface (5.1) is formed from binder and/or filler and/or is hardenable.
8. The device according to any one of the preceding claims, characterised in that a device is provided for the signing and/or marking of the lens (1).
9. The device according to any one of the preceding claims, characterised in that a washing and/or rinsing device is provided for the lens (1).
10. The device according to any one of the preceding claims, characterised in that the reference face (4) is arranged orthogonal and/or parallel to the optical axis (1.3, 1.4) of the first side (1.1) and/or of the second side (1.2) of the lens (1).
11. A method for the production of a lens from a lens blank (1) with unmachined sides, which is clamped in a lens mounting (3) rotatable about a workpiece spindle axis, according to which a first optically active face with an optical axis (1.3) on the first side (1.1) of the lens blank (1) is worked, whereby the optical axis (1.2) of this face essentially lies in the work piece spindle axis, characterised by the following process steps:

    a) producing a clamping shoulder (4)with a cylindrical lateral surface (4.2) and an annular seating surface (4.1), which serve as a positioning feature (4.1) with reference to the optical axis (1.3), whereby the axis (12) defined by the lateral surface (4.2) and the annular surface (4.1) runs offset and/or tilted to the optical axis (1.3) of the first optically active face (1.1), whereby this step can also take place before the working of the first optically active face (1.1),

    b) removal and turning round of the lens blank (1) so far machined,

    c) clamping of the turned-round lens blank (1) into the already employed or another lens mounting (3), so that the axis (12) of the clamping shoulder (4) coincides with the workpiece spindle axis,

    d) working of a second optical face (1.2) with an optical axis (1.4) on the second side of the lens blank (1), whereby the optical axis (1.4) of this face also essentially lies in the workpiece spindle axis.
12. A method for the machining of a bilaterally optically active lens (1) with a cutting, milling, and/or a polishing unit for the machining of at least a first side (1.1) of the lens (1), whereby the lens (1) is held via a first holding device assigned to a second side (1.2) and a reclamping unit (2) for the reclamping of the lens (1) from the first side (1.1) onto the second side (1.2) is provided for the purpose of machining the second side (1.2) of the lens (1), characterised by the following process steps:

    a) the lens (1) is provided by means of the cutting process with at least one positioning feature (4.1) having a reference to the first side (1.1) and/or to the second side (1.2),

    b) the lens (1) is gripped by the second holding device (3) after the cutting and/or after the polishing of a first side (1.1) and before the removal from the first holding device and is aligned by means of the positioning feature (4) relative to the second holding device (3),

    c) the second side (1.2) of the lens (1) is machined by the cutting and/or polishing unit.
13. The method according claim 12, characterised in that the lens (1) is clamped in the radial direction by holding parts (3.1) of the second holding device (3), whereby the positioning feature of the lens (1) formed as a reference face (4) is brought into contact with at least one holding part (3.1) or a seating (3.3) of the holding part (3.1).
14. The method according claim 12 or 13, characterised in that the reference face (4) is arranged normal to or parallel to an optical axis (1.3, 1.4) of the lens (1).
15. The method according claim 12, 13 or 14, characterised in that the supporting part (5) is brought into contact with the first side (1.1).
16. The method according claim 12 to 14 or 15, characterised in that a marking and/or signing for the subsequent alignment of the lens (1) is placed or incorporated on the first side (1.1) and/or on the second side (1.2).
17. The method according claim 12 to 15 or 16, characterised in that, after the machining of the first side (1.1), a protective layer or a protective film is arranged on the latter.
18. The method according claim 12 to 16 or 17, characterised in that the lens (1) is washed after the machining of the first side (1.1) or after the polishing and before the application of the protective layer or the protective film.
19. The method according claim 12 to 17 or 18, characterised in that the first side (1.1) and/or the second side (1.2) is provided with a coating.
20. The method according claim 12 to 18 or 19, characterised in that the lens (1) is held by the clamping jaws (3.1, 3.2) of the second holding device after the machining of the first side (1.1) and before removal from the first holding device.
21. The method according claim 19 or 20, characterised in that, before or after the coating, an edge working takes place for the subsequent positioning and/or fixing of the lens (1) in the spectacle frame.

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