EP3116684A1

EP3116684A1 - Alternative blocking

Info

Publication number: EP3116684A1
Application number: EP15712523.8A
Authority: EP
Inventors: Karl Huber
Original assignee: Rodenstock GmbH
Current assignee: Rodenstock GmbH
Priority date: 2014-03-12
Filing date: 2015-03-11
Publication date: 2017-01-18
Anticipated expiration: 2035-03-11
Also published as: EP3116684B1; WO2015135651A1; US20160375540A1; DE102014003539A1; US10118271B2

Abstract

A device for blocking a spectacle lens blank (15) which has a finished surface (16) and, opposite said finished surface (16), a machining surface for machining in a machining device, comprises a receiving component (9) having a convex, plane or concave receiving surface (13) for blocking the finished surface (16) of the spectacle lens blank (15). The receiving component (9) has a substantially flat counter-surface (10) on the side opposite the receiving surface (13). The normal (11) of said counter-surface (10) is inclined by 1° to 10° with respect to the normal (14) in the center of the receiving surface (13).

Description

"Alternative blocking"

description

The invention relates to a device for blocking a lens blank, a method for blocking a lens blank and the use of a device for blocking a lens blank.

For the production of individually adapted spectacle lenses, a customer is e.g. Refracted by an optometrist and thereby measured customer parameters transmitted to a spectacle lens manufacturer. The spectacle lens manufacturer determines for this individual customer a suitable spectacle lens blank, also called a blank, which generally has a convex optical finished surface, and calculates to the lens blank a matching back surface, which depends on the measured customer parameters and is called prescription surface. The recipe surface can be a sphere, a toms, an asphere, an atom or even a freeform surface. In order to clamp the lens blank for processing the recipe surface in a correct position in a processing device, the lens blank is usually connected via a block material with a clampable block piece. This process is called blocking, whereby a block is formed from a block piece, a block material and a lens blank.

In the most common manufacturing processes for manufacturing and processing the prescription surface, the block is clamped in the processing machine such that an axis of symmetry of the block, called the block piece axis or machining axis, coincides with a workpiece spindle axis of the processing device to rotate the lens blank during machining about that axis can. Thus, the recipe surface can be machined by milling, grinding and / or turning with a spiral tool path. This results in exactly in the middle of the C-axis (the round or pivot axis) a singular point in which the spiral begins or ends.

If the finished spectacle lens at this point have a prism, the lens blank is prismatically blocked in the rule. In this case, the finished surface of the lens blank in relation to the block piece is tilted so that the surface normal of the recipe surface coincides only in the singular point with the Blockstückachse and thus the workpiece spindle axis. As a result, high dynamic demands on the machine and the associated errors are avoided in this point.

The blocking of the lens blank is usually carried out by positioning the block member in inclined relation to the finished surface of the lens blank in a device which is also called a blocker. After both parts have been positioned relative to one another, the substantially wedge-shaped intermediate space is poured out as a block material with liquid wax, plastic, UV-curing plastic or a low-melting metal alloy (for example aluminum) and cooled to solidification or cured by UV light. In this case, the lens blank and the block piece is firmly connected.

The disadvantage of this method is that this process brings heat into the system and by the phase transition from liquid to solid, the blocker material naturally shrinks. As a result, the spectacle lens blank is deformed or held in a not precisely defined position such that deviations from the desired optical properties result in the finished spectacle lens.

Blocking with Alloy additionally has the disadvantage that the material has a high content of toxic heavy metals.

Furthermore, the glass is not fully supported during processing. Surrender by the prescription values non-circular glasses, only the central circular area of the lens blank can be supported by the block material, which is completely covered by the glass even with the finished ground lens and whose center coincides with the axis of rotation. This sometimes results in larger outdoor areas in the block, which are not supported during processing. As a result, there are cosmetic and optical defects, especially in the margins of very thin glasses.

The invention has for its object to provide an improved prismatic and / or fully supported blocking of a lens blank.

The invention is solved by the subject matters of the independent claims.

One aspect relates to a device for blocking a lens blank which has a finished surface and a processing surface opposite the finished surface for processing into a processing device. With the processing device, the spectacle lens blank can be processed to form a prismatic spectacle lens. The device for blocking has a receiving component, which has a convex, planar or concave receiving surface for blocking the finished surface of the lens blank. Since the finished surface is convex in most lens blanks, the receiving surface for such lens blanks is concave. For spectacle lens blanks with concave finished surfaces, the receiving component may have a convex receiving surface. For plane lens blanks the receiving surface can also be designed plan.

The receiving component has a substantially flat counter surface, which is arranged opposite the receiving surface. In this case, the normal of the mating surface is inclined by 1 ° to 10 °, preferably between 1 ° and 5 °, particularly preferably between 2 ° and 3 ° to the normal in the center of the receiving surface. Here, the center of the receiving surface of the intersection (eg puncture point) of the receiving surface with the normal of the counter surface. The center of the receiving surface is preferably on the symmetry axis of a Storage components (see embodiment below).

The receiving component thus has a substantially wedge-shaped cross section, wherein a wedge side - namely the section through the receiving surface - is concave or convex.

The wedge angle or the inclination of the convex or concave receiving surface relative to the mating surface corresponds to the angle of the two surface normals. In the case of a substantially spherical shape of the receiving surface, the normal runs in the center of the receiving surface through the spherical center of the circle.

The center of the receiving surface may be formed as the equilibrium support point at which the receiving surface can be supported supported in equilibrium, if one assigns the recording surface any constant homogeneous surface density (eg in the unit kg / m ² ). The equilibrium support point in this case may be just below, above or in the geometric center of gravity of the receiving surface.

The receiving surface can be designed in particular for receiving a spherical finished surface of a spectacle lens blank in the form of a concave spherical cap, ie as the curved part of a spherical segment. In this embodiment, the center of the receiving surface may be formed as the intersection of the solder on the center of the circular disc of the spherical segment with the receiving surface. The normal in the center of the receiving surface may coincide with this Lot.

The receiving surface is exactly the surface part of the receiving member, which is designed and provided for supporting and supporting the lens blank, without any edge areas.

Due to the pre-tilt of the receiving surface to a receiving angle ß with respect to the mating surface, a receiving member with a on be made prism to be produced in the spectacle lens adapted tilt, so that the lens blank can be placed on the receiving surface substantially block over the entire area. For example, a spectacle lens may have a prism for correcting eye defects or be provided as a center thickness reduction prism by means of which the thickness of the spectacle lens can be reduced.

In this case, the prismatic blocking of the lens blank is improved: Thus, the required mass of block material is reduced by the full-surface edition of the lens blank on the support surface, of which only a very thin layer is required when blocking the lens blank on the receiving surface. This reduces the effects on the alignment of the lens blank during the phase transition of the block material from liquid to solid, as warps due to shrinkage are reduced. When using a schmermetalhaltigen block material, the vapors are reduced by the low mass of block material. A thin layer of block material can still be more easily released from the finished spectacle lens. As a result, cosmetic and optical defects are avoided on the lens.

Furthermore, there are fewer requirements for the stiffness of the block material than for a block material, which has to fill larger volumes. This allows the use of lower stiffness block materials.

In one embodiment, the device has a bearing component with a substantially planar and inclined bearing surface on which the receiving component can be mounted with its mating surface. The bearing surface of the bearing component is inclined relative to a predetermined machining axis of the bearing component. The machining axis of the bearing component is, to a good approximation, a rotational symmetry axis of the bearing component and designed and intended to coincide with a workpiece spindle axis, the C axis, of the machining device in a machining position clamped in a machining device. During machining, the bearing component can be rotated about the machining axis, with the entire Block is turned.

Thus, not only the receiving member itself has an inclined counter surface, but also the bearing member on which the receiving member is stored. Thus, the final inclination of the receiving surface for the lens blank depends both on the inclination of the counter surface and on the inclination of the bearing surface. Thus, the inclination of the receiving surface is individually adjustable to the prism to be created for the spectacle lens by the positioning of the counter surface relative to the bearing surface.

In this embodiment, the bearing surface may be formed so inclined in a machining position that the normal inclined in the center of the bearing surface by 1 ° to 10 °, preferably between 1 ° and 5 °, more preferably between 2 ° and 3 ° relative to the machining axis of the processing device is.

In one embodiment, the normal of the mating surface is tilted by the same angle (namely, the pickup angle β) against the normal at the center of the pickup surface as the normal at the center of the bearing surface opposite the machining axis (namely, the bearing pitch angle β). For example, both inclination angle 2.5 °, so can be blocked with the device spectacle lens blanks with a prismatic angle between 0 ° and 5 °.

In one embodiment, the receiving member and the support member are relatively rotatable relative to each other, so that the normal is arranged in the center of the receiving surface in a processing position of the device relative to the processing axis parallel or inclined, and wherein the amount of inclination is dependent on the relative rotational position of the receiving member to the storage component. Receiving member and storage component are formed rotatable against each other. Depending on the turning position, the inclinations of the opposing surface and the bearing surface add up, or they cancel each other out. Thus, via the relative rotational position of the two components to each other, the inclination angle of the bearing surface adjustable and exactly tuned to the prism to be produced. The rotation adjustment can be done continuously or in individual locking steps. For this purpose, locking elements may be formed on the bearing component and / or on the receiving component. If the two inclinations cancel each other out in a rotation adjustment, then in particular a prism of 0 dpt can also be set. In this special rotation adjustment, the normal of the receiving surface is co-linear or coaxial with the machining axis.

In a further development of this embodiment, in the machining position of the device by the relative rotational position of the receiving component to the mounting member, an inclination angle between the normal in the center of the receiving surface relative to the machining axis of the bearing member of 0 ° to 20 °, preferably between 0 ° and 10 °, particularly preferred adjustable between 0 ° and 5 °. The angle of inclination of the receiving surface in the processing position of the device is dependent on the inclinations of the counter surface and the bearing surface.

According to one embodiment, the receiving member and the bearing member are positively and / or non-positively connectable. The connection can be made, for example, by spring force, by screws, hydraulically, pneumatically and / or by negative pressure. For this purpose, corresponding connection means can be provided on the mounting component and on the receiving component. The connection can be detachable, so that at least the bearing component is reusable, while the receiving member may be formed as a wear component. According to one embodiment, the support member is formed as a separate, separate component. This allows a simple rotation of the receiving member against the support member for adjusting the prismatic angle of attack. In this embodiment, the device is formed in two parts. In an alternative embodiment, the bearing surface of the bearing component is formed as an integral part of the processing device. In this embodiment, the integrally formed receiving device directly on the inclined bearing surface are placed, which may be formed for example in the chuck of the processing device.

According to one embodiment, the receiving component is formed from a material that can be easily cut. As an easy-to-chip material, e.g. Polystyrene or a metal such as e.g. Zinc or aluminum can be used. Preferably, the receiving member is formed as an injection molded part, e.g. made of polystyrene, and is thus inexpensive to produce. As a result, the spectacle lens blank can be completely blocked on the receiving component, even if the finished spectacle lens is not intended to be circular in shape. The spanbare receiving component is abgespant when editing the lens blank together with the lens blank. This allows support of the lens blank during processing at all locations and improves the quality of the final product. Preferably, the device for blocking is designed and intended to be clamped in the same processing devices as previously known block pieces.

One aspect relates to a method for blocking a lens blank with a finished surface and a processing surface opposite the finished surface for processing in a processing device, with which the lens blank is processable into a prismatic lens, with the steps

Laying a substantially flat mating surface of a receiving member having a convex, planar or concave receiving surface on a substantially flat and inclined

Bearing surface of a bearing component,

Twisting of the receiving member relative to the support member until the normal is inclined in the center of the receiving surface with respect to a predetermined machining axis of the bearing member at a predetermined angle, and

Blocking a lens blank on the receiving surface. In this method, the lens blank can be connected to the receiving surface of the receiving member by gluing, by adhesive tape, by adhesion, by at least one chemically curable material, and / or by at least one material by means of a phase transition from liquid to solid over the entire surface detachably. These materials can be used as block materials, for example. By the exact alignment of the support surface on the predetermined prism, the distance between the receiving member as part of the block piece and the lens blank is reduced so that block materials can be used which could fill a voluminous gap not stable (such as hitherto a heavy metal-containing wax or a heavy metal-containing adhesive). Under certain circumstances, the blocking can thus already take place by means of a double-sided adhesive tape. Preferably, a largely heavy metal-free block material is used for blocking. In one aspect, one of the devices described above is used to perform the method.

The invention will be described in more detail below with reference to embodiments shown in FIGS. Individual features of the embodiments shown in the figures can be transferred to other embodiments. Show it:

Figure 1 is a storage component in the form of a Spannblpcks as part of a

Apparatus for blocking a lens blank;

Figure 2 shows a receiving member of a device for blocking a

Spectacle lens blank;

3 shows a two-part device for blocking together with a

Lens blank, in whose prescription surface no prism is to be incorporated, FIG. 4 shows a two-part device for blocking together with a spectacle lens blank in whose prescription surface a prism is to be incorporated, and FIG. 5 shows a receiving component which is coupled to a mounting component by means of negative pressure.

Figure 1 shows a clamping block 1 as an embodiment of a storage component of a device for blocking. In this case, a side view of the clamping block 1 is shown in the left half of Figure 1, while the right half of Figure 1 shows a cross-sectional view through the clamping block 1.

The clamping block 1 is designed as a reusable bearing component. A central clamping block axis 2 through the clamping block 1 is designed and intended to serve as a predetermined machining axis of a spectacle lens blank. The clamping block 1 can be clamped in a (not shown in the figures) processing device, so that the clamping block 1 is in its processing position. The clamping block 1 is substantially cylindrical in shape and with respect to the clamping block axis 2 is substantially rotationally symmetrical, except for a surface inclination, which will be described in more detail below. The clamping block axis 2, ie the machining axis of the clamping block 1 as a bearing component, can coincide in the machining position with a workpiece spindle axis of the machining device.

The clamping block 1 further has centric alignment surfaces 3, rotational alignment surfaces 4 and axial alignment surfaces 5, which are each provided for centric, rotational or axial alignment of the clamping block 1 in the processing device relative to a tool spindle of the processing device.

The centric alignment surfaces 3 are parallel to the clamping block axis. 2 formed and are designed as a cylinder jacket of the clamping pad 1. The cylinder end of the clamping block 1, which is designed and intended to be clamped in the processing device, empties into the cylinder jacket formed by the central alignment surfaces 3 in three feet, which taper in the direction of clamping side cylinder end of the clamping block 1. These taper surfaces of the three feet are formed by the rotational alignment surfaces 4. The other cylinder end of the clamping block 1, which is opposite to the clamping-side cylinder end, is designed and provided to receive a spectacle lens blank via a receiving component 9 (see FIG. At this receiving-side cylinder end of the clamping block 1, the cylinder jacket formed by the central alignment surfaces 3 opens into a ring disk surface arranged perpendicular to the cylinder wall, which is formed by the axial alignment surfaces 5. By the axial alignment surfaces 5, the diameter of the cylindrical clamping pad is widened stepwise at this point. The axial alignment surfaces 5 are formed perpendicular to the machining axis, ie the clamping block axis 2.

A relative to the clamping block axis 2 by a bearing inclination angle α inclined bearing surface 6 limits the clamping block 1 at its receiving side cylinder end. The bearing surface 6 is substantially flat and substantially disc-shaped. The disk center is located near the machining axis 2. The disk center point should be offset from the machining axis 2 so that the pivot point of the mounting surface comes to lie on the machining axis. The bearing surface 6 is further formed inclined so that the normal 7 of the bearing surface 6 is inclined by the bearing inclination angle α relative to the clamping block axis 2. The normal of the bearing surface 6 is shown in Figure 2 as a bearing axis 7.

The bearing surface 6 is formed as a disk-shaped recess in the receiving side cylinder end of the clamping pad 1. The disk-shaped recess thus has a step-like increase at its ring ends. The walls of this elevation are designed in the form of a cylinder jacket as storage component centering surfaces 8, the storage component centering surfaces 8 being parallel to the bearing axis 7 are arranged.

Figure 2 shows a receiving member 9, which is designed as a blank receptacle or spectacle lens blank receptacle. In this case, a side view of the receiving member 9 is shown in the left half of Figure 1, while the right half of Figure 2 shows a cross-sectional view through the receiving member 9.

The receiving member 9 is formed substantially disc-shaped, wherein a disc surface is formed as a receiving surface 13 in the form of a joining surface. The receiving surface 13 is concave and serves to receive and support a finished surface of a lens blank during blocking. For this purpose, the receiving surface 13 largely on the counter-shape of the finished surface of a processed glass lens blank, which generally corresponds to a sphere. The receiving surface 13 opposite disc surface of the receiving member 9 is formed as a substantially flat and circular counter-surface 10. The normal 11 of the counter surface 10 is inclined relative to the normal 14 in the center of the receiving surface 13 to a receiving angle ß. The two normals 11 and 14 intersect at or near the point of intersection of the normal 11 of the mating surface 10 with the receiving surface 13.

The mating surface 10 is stepped from the residual body of the receiving member 9 stepped. Cylinder jacket-shaped receiving component centering surfaces 12, which are formed parallel to the normal 11 of the counter surface 10, are formed on the step.

The receiving component 9 shown in FIG. 2 and the clamping block 1 shown in FIG. 1 are designed and intended to be used as a two-part device for blocking. For this purpose, the two components are assembled, as shown in Figures 3 and 4.

Figure 3 shows in a cross section through a block the clamping block 1 and the Receiving member 9 in an assembled and interconnected state. On the receiving surface 13 of the receiving member 9, a lens blank 5 is arranged and blocked. In the assembled state, the mating surface 10 of the receiving member 9 lies on the entire surface and parallel to the bearing surface 6 of the clamping block 1. The normal 11 of the mating surface 10 and the clamping block axis 2 are arranged as a processing axis directly to each other. For this purpose, the bearing surface 6 is centered on the mating surface 10 by means of the receiving component centering surfaces 12 and the bearing component centering surfaces 8. For this purpose, the cylinder radius of the cylindrical bearing component centering surfaces 8 is adapted to the cylinder radius of the cylindrical receiving component centering surfaces 12 and / or vice versa.

By turning the two components (receiving member 9 and clamping block 1) to each other, the prism necessary for processing can be adjusted. The inclination of the normal 14 of the receiving surface 13 relative to the clamping block axis 2 is dependent on the relative rotational position of the receiving member 9 to the clamping block 1. Thus, the inclination of the blocked lens blank 15 relative to the clamping block axis 2 is dependent on this relative rotational position.

The clamping block 1 and the receiving member 9 are connected by form or adhesion with each other releasably connected to a block unit. The form or adhesion can be done by spring force, by screws, hydraulically, pneumatically or by negative pressure. The lens blank 15 is blocked with its finished surface 16 on the receiving surface 13 of the receiving member 9 by gluing, by adhesive tape, by adhesion, by chemically curable materials and / or by materials with phase transition from liquid to solid as a block material 17. This is done after the receiving member 9 and the clamping block 1 by rotational movement against each other exactly adjusted to the prism to be produced and fastened together. Therefore, it is sufficient for blocking to connect the lens blank 15 via a relatively thin layer of block material 17 either with a partial surface or over the entire surface releasably connected to the receiving member 9.

By using a thin layer of block material 17, the heat input or the shrinkage during curing of the block material 17 is so small that no appreciable distortions in the alignment of the lens blank 15 occur.

For this purpose, the two components of the device for blocking may preferably be designed such that the normal 14 of the receiving surface 13, the clamping block axis 2 and the finished surface 16 of the lens blank 15 have a common point of intersection 18 (see FIG.

Furthermore, the bearing inclination angle α between the clamping block axis 2 and the bearing axis 7 of the clamping block 1 can be formed equal to the receiving angle β between the normal 11 of the counter surface and the normal 14 of the Aufnähmefläche 13. In this embodiment, a prism of 0 dpt results when the clamping block axis 2 coincides with the normal 14 of the receiving surface 13 and the angles α and ß cancel each other (see Figure 3).

By a rotation of the receiving member 9 relative to the clamping block 1 by 180 ° from this position results in this embodiment, the maximum adjustable prism, which corresponds to the sum of the bank angle α and angle of inclination ß (see Figure 4). Between the two positions, each prism angle can be adjusted by rotation with discrete stepping or infinitely variable. 4 shows, analogously to FIG. 3, the block of clamping block 1, receiving component 9 and spectacle lens blank 15. In contrast to the relative position shown in FIG. 3, the clamping block 1 and receiving component 9 are thus rotated relative to one another, that the normal 14 of the receiving surface 13 is aligned inclined at the maximum adjustable inclination angle α + ß against the machining axis 2 and thus the maximum prism is set for processing. The unit comprising the clamping block 1, the receiving component 9 and the lens blank 15 provides a block. By means of the clamping block 1, the block in a processing device (not shown) centered, be aligned axially and in its rotational position. Furthermore, the machining forces from the chuck of the machine can be transferred to the block. The prescription surface of the lens blank 15 and the necessary for the production of the glass glass positions from the customer data (eg engraving positions) are adjusted according to the rotation of the receiving member 9 relative to the clamping block 1 to the rotational position of the resulting prism base. The receiving member 9 may consist of a machinable, non-polluting material. During production of the prescription surface and / or the outer contour of the lens blank 15 is processed. If it requires the geometry of the spectacle lens to be produced, the receiving component 9 connected to the spectacle lens blank 15 is also partly machined. Afterwards, the recipe surface is polished. Possibly. After polishing, only the outer contour of the lens blank 15 is made. This has the advantage that the lens blank 15 can be polished largely without edge defects, since the polishing tool is supported by the receiving member 9 and does not tilt over the edge of the glass. After completion of the prescription surface and possibly the outer contour of the spectacle lens is released from the receiving member 9 and optionally supplied to further refining steps.

In an alternative embodiment, the clamping block 1 is dispensed with. The bearing surface 6, the bearing axis 7 and the Lagerungsbauteilzentrierfläche 8 are formed in this embodiment as components of the workpiece spindle of the processing device. Figure 5 shows a two part device for blocking. In this case, a side view of the device is shown in the left half of Figure 5, while the right half of Figure 5 shows a cross section through the device.

Figure 5 shows an embodiment of the two-part device for blocking, in which the receiving member 9 is releasably secured to the clamping block 1 by adhesion by means of negative pressure. After the inclination angle of the prism is adjusted by the above-described rotational movement, the gap between the clamping pad 1 and the receiving member 9 is limited by a seal 19 and evacuated via a valve 20. The external pressure then presses the mating surface 10 and the bearing surface 6 against each other and thus ensures the position of the two components of the device to each other by frictional engagement. LIST OF REFERENCE NUMBERS

1 clamping block; storage component

2 clamping block axis; machining axis

3 centric alignment surface

4 rotary alignment surface

5 axial alignment surface

6 storage area

7 bearing axis

8 bearing component centering surface

9 receiving component

10 counter surface

11 normal of the opposite surface

12 receiving component centering surface

13 receiving surface

14 normal in the center of the recording surface

15 lens blank

16 finished area 17 block material

18 point of intersection

19 seal

20 valve

α Bearing angle ß Inclination angle

Claims

claims

An apparatus for blocking a lens blank (15) having a finish surface (16) and a finishing surface (16) opposite processing surface for processing in a processing apparatus, with

- A receiving member (9) with a convex, plan or concave

Receiving surface (13) for blocking the finished surface (16) of the lens blank (15), wherein

the receiving component (9) has a substantially planar mating surface (10), which is arranged opposite the receiving surface (13), and wherein

the normal (11) of the mating surface (10) is inclined by 1 ° to 10 ° to the normal (14) in the center of the receiving surface (13).

2. Device according to claim 1 with a storage component (1) having a substantially planar and inclined bearing surface (6) on which the receiving member

(9) with its counter-surface (10) can be stored.

3. Apparatus according to claim 2, wherein the bearing surface (6) is inclined in a machining position so that the normal (7) of the bearing surface (6) inclined by 1 ° to 10 ° relative to a predetermined machining axis (2) of the bearing component (1) is.

4. Apparatus according to claim 2 or 3, wherein the normal (11) of the mating surface

(10) is inclined at the same angle to the normal (14) at the center (18) of the receiving surface (13) as the normal (7) of the bearing surface (6) the machining axis (2) of the bearing component (1).

5. The device according to at least one of claims 2 to 4, wherein the receiving member (9) and the support member (1) are rotatable relative to each other so formed that the normal (14) in the center of the receiving surface (13) relative to the machining axis (2) of the Positioning member (1) is arranged parallel or inclined, and wherein the size of the inclination depending on the relative rotational position of the receiving member (9) to the support member (1).

6. Apparatus according to claim 5, wherein by the relative rotational position of the receiving member (9) to the storage component (1) an inclination angle between the normal (14) in the center of the receiving surface (13) relative to the machining axis (2) from 0 ° to 20 ° adjustable is.

7. The device according to at least one of claims 2 to 6, wherein the receiving member (9) and the support member (1) positively and / or non-positively connected to each other.

8. The device according to at least one of claims 2 to 7, wherein the support member (1) is formed as a separate component.

9. Device according to at least one of claims 2 to 7, wherein the bearing surface (6) of the bearing member (1) is formed as an integral part of the processing device.

10. The device according to at least one of the preceding claims, wherein the receiving member (9) is formed of a material easily spanbaren.

11. The device according to at least one of the preceding claims, wherein the receiving surface (9) is designed in the form of a concave spherical cap.

12. A method for blocking a lens blank (15) having a finished surface (16) and having a finishing surface (16) opposite processing surface for processing in a processing device, comprising the steps

Laying a substantially flat mating surface (10) of a receiving member (9) having a convex, planar or concave receiving surface (13) on a substantially flat and inclined

Bearing surface (6) of a storage component (1),

Twisting the receiving member (9) relative to the support member (1) until the normal (14) in the center of the receiving surface (13) relative to a machining axis (2) of the bearing member (1) at a predetermined angle (α + ß) is inclined and

Blocking a lens blank (15) on the receiving surface (13).

13. The method of claim 12, wherein the lens blank (15) with the receiving surface (13) of the receiving member (9) by gluing, by adhesive tape, by adhesion, by at least one chemically curable material, and / or by at least one material by means of a phase transition is connected from liquid to solid over the entire surface detachably.

14. Use of a device according to at least one of claims 1 to 11 for carrying out the method according to claim 12 or 13.