WO2018046138A1

WO2018046138A1 - Arrangement and method for holding an optical workpiece, and optical workpiece and eyeglasses

Info

Publication number: WO2018046138A1
Application number: PCT/EP2017/025249
Authority: WO
Inventors: Gunter Schneider; Stephan Huttenhuis
Original assignee: Schneider Gmbh & Co. Kg
Priority date: 2016-09-06
Filing date: 2017-09-01
Publication date: 2018-03-15
Also published as: DE102017003224A1

Abstract

The invention relates to an arrangement comprising an optical workpiece and a holding element, a method for holding an optical workpiece and an optical workpiece and glasses manufactured therefrom, the optical workpiece and/or the holding element being obtained by rapid manufacturing.

Description

Arrangement and method for holding an optical workpiece and optical workpiece and glasses

The present invention relates to an arrangement comprising an optical workpiece and a holding member for holding the optical workpiece according to the preamble of claim 1, a method for holding an optical workpiece according to the preamble of claim 23, an optical workpiece, preferably an optical lens , According to the preamble of claim 41 or 54, a pair of glasses, and a use of the workpiece, in particular as a spectacle lens for a pair of glasses.

An optical workpiece, for example an optical lens for a pair of glasses, should have certain optical properties. Common practice is to temporarily attach a blank of the optical workpiece on a holder - such as a block piece - and then machined depending on the desired optical properties, such as machining or material removal, for example by turning and / or milling. The optical workpiece can also be machined peripherally or edge erosive material, in particular for mounting on a spectacle frame.

As an alternative to the abovementioned conventional, material-removing production methods, optical workpieces or lenses can in principle be produced generatively, even if this is still difficult in practice. For the purposes of the present invention, the term "generative" is understood in particular to mean the production of a component based on a generative or additive or comparable manufacturing process. In this case, the component to be produced is preferably initially provided in the form of a three-dimensional image data set (CAD model) and, in particular, produced in layers as part of the production process, that is to say generatively or material-applying or building-up.

In the case of optical workpieces or lenses for spectacles, ie spectacle lenses, the requirements are particularly high, since, in addition to compliance with low production tolerances and a high surface quality, optical properties - for example a sufficiently high transparency and a defined refractive index behavior - must be achieved. In addition, aspects in terms of post-processing and assembly, especially in a spectacle frame, important.

As a result, efficient use of generative manufacturing processes to fabricate optical workpieces or assemblies is difficult but desirable.

DE 10 2013 222 232 A1 discloses an arrangement with a casting mold and a lens blank as well as a related manufacturing method. The casting mold has a casting shell for receiving a first flat side of the spectacle glass blank. The mold and the lens blank are generatively produced by a 3D printing process. A disadvantage of this known arrangement is that an efficient or simple processing, in particular a uniform coating, a flat side of the lens blank facing away from the casting mold is not or at most only very difficult. Furthermore, desired, in particular individualized, optical properties are not taken into account or at best inadequately considered in the context of production preparation. Finally, a subsequent assembly of the spectacle lens in a spectacle frame is comparatively complicated and costly. WO 2015/165435 A1 discloses a method for the generative production of an optical lens, wherein a retention of the lens is not discussed.

DE 10 2014 012 046 A1 discloses a method for producing an optical lens, in particular by laser sintering (SLS).

WO 2014/146931 A1 discloses a method for printing an optical workpiece, whereby printing inks mixed with one another are ejected dropwise onto a substrate. The printing inks have different refractive indices, and by adjusting the mixing ratio of the printing inks, a printing droplet having the desired refractive index is formed. The printing inks can also differ in terms of their color. The exact refractive behavior of the printed optical workpiece or the connection to a spectacle frame will not be discussed in detail. The present invention has for its object to provide an arrangement, a method for holding an optical workpiece, an optical workpiece, preferably an optical lens, in particular for a pair of spectacles, and a pair of spectacles, wherein in the context of generative manufacturing an efficient, fast and / or cost-effective production and / or fast, flexible, easy and / or cost-effective handling is enabled or supported.

The above object is achieved by an arrangement according to claim 1, a method according to claim 23, an optical workpiece according to claim 41 or 54, a pair of spectacles according to claim 61 or a use according to claim 63. Advantageous developments are the subject of the dependent claims.

A first aspect of the present invention is that an arrangement with a preferably disc-shaped or flat optical workpiece, preferably an optical lens, in particular for a pair of spectacles, is provided, wherein the arrangement has a holding element for the optical workpiece. According to the invention, the optical workpiece is held at least substantially in a form-fitting manner and / or laterally by the retaining element. This simplifies the production and / or further handling and allows or simplifies a fastening of the workpiece to the holding element, so that in particular the so-called blocking can be dispensed with. Thus, an effective and / or rapid post-processing, preferably coating, in particular a flat side of the optical workpiece is made possible, since the optical workpiece is securely held laterally by means of the retaining element, whereas the flat side to be machined is at least substantially exposed. This is particularly advantageous in the case of highly dynamic post-processing processes, for example spin coating and / or dip coating, since a secure and defined fixation is important here.

Particularly preferably, both the optical workpiece and the retaining element are produced generatively. In this way, corresponding advantages can be realized. The holding element preferably has an at least substantially circular outline in its plan view. This allows a very simple and / or cost-effective connection to corresponding processing devices and / or a safe and / or effective handling or coating. Particularly preferably, the outline of the workpiece is individually adapted to a spectacle frame and / or formed in its plan view at least substantially out of round. This allows a very simple and / or cost-effective realization tion, in particular since a shaping edge processing of the optical workpiece for adaptation to a spectacle frame can be omitted or simplified.

In particular, the workpiece is held securely along its entire circumference by the retaining element.

Preferably, the thicknesses of the holding member and the optical workpiece are at least substantially equal. This allows efficient and / or fast processing.

Particularly preferably, one or each flat side of the workpiece is substantially smooth and / or uninterrupted so that it is flush with the surface - into a subsequent surface of the retaining element. Thus, a simple and / or high-quality processing, preferably a full-surface uniform coating of the flat side - especially by spin coating - supported or only possible.

The holding element preferably engages exclusively on a narrow side edge area or peripheral surface of the optical workpiece which is closed on the circumferential side. Particularly preferably, the holding element engages with a holding surface on the edge surface or peripheral surface, in particular wherein the holding surface and the edge surface are at least substantially complementary to each other. This allows an efficient and / or secure peripheral or circumferential holding or fixing of the optical workpiece by means of the holding element.

With particular preference, different materials are used for the optical workpiece and the holding element, which differ from one another with respect to their mechanical properties, preferably hardness and / or density and / or strength and / or elasticity and / or plasticity, in particular so that a fast, safe and secure / or cost-effective joining of the optical workpiece and the holding element and / or a fast, safe and / or cost-effective release of the optical workpiece supported by the holding element or only be enabled / will.

A proposed method is characterized according to a second, independently realizable aspect of the present invention, in particular by an optical workpiece and / or a holding element for the optical Workpiece is produced generatively or become, wherein the optical workpiece is positively held and / or laterally held by the holding element. This results in turn corresponding advantages, as in the above arrangement.

Preferably, the optical workpiece and the holding element are produced simultaneously or in the context of a common generative manufacturing process and / or in particular as an already completely assembled arrangement or assembly. Accordingly, a very fast and / or simple production or processing is possible.

Alternatively, the optical workpiece and the holding element are produced as separate or independent components and preferably subsequently assembled or assembled. In particular, the optical workpiece, on the one hand, and the retaining element, on the other hand, are produced in each case by different generative manufacturing methods. In this way, the desired component properties of the optical workpiece and the holding element can be realized in a targeted manner by selecting correspondingly suitable generative production methods.

According to a third aspect of the present invention, which can also be implemented independently, the preferably generatively produced optical workpiece has at least two optical regions, wherein the optical regions have different refractive indices. This allows a very simple and / or cost-effective production of an optical workpiece with a desired, in particular individualized optical image. In particular, a (subsequent) shaping machining of the workpiece surface can be omitted or simplified, since the associated optical properties have already been taken into account in the context of additive manufacturing. Accordingly, a very rapid and / or cost-effective generative production of optical workpieces is supported or made possible in accordance with the invention, taking into account a specific or defined refractive behavior.

In particular, different (plastic) materials are used for the optical regions, which differ from one another with regard to their refractive indices. This allows a safe, simple and / or cost-effective implementation. In particular, the optical workpiece has one or two at least substantially planar or planar flat sides.

In particular, the desired refractive behavior of the workpiece (exclusively or partially) is realized by the preferably layered superimposed optical regions with in particular curved interface, so that a shaping processing or curvature of one or both flat sides is preferably eliminated or at least simplified. In particular, the optical regions merge into one another along a curved interface. The shape of the boundary surface makes it possible to influence or realize the optical properties of the workpiece, in particular in addition to the targeted selection of materials and thus the definition of the indices of the optical regions.

The transition between the two optical regions with different refractive indices can be abruptly to form a corresponding breaking interface, for example, to realize a bifocal lens, or according to a particularly preferred variant also gradually or continuously, optionally in small steps, in particular for the production of so-called gradient glasses. For this purpose, for example, several base materials with different indices can be used in the generative production. These base materials can then be used individually or in possibly different mixtures in order to achieve desired index changes or index transitions when building up the workpiece during generative production. Thus, in particular so-called gradient glasses can be produced, which are particularly preferably used as so-called progressive or progressive lenses for spectacles.

Due to the generative production, it is particularly easy to realize desired transitions of the refractive index or changes in the refractive index of the workpiece.

In particular, it is possible in the radial and / or axial direction with respect to the optical axis of the workpiece to vary the refractive index in a desired manner gradually or continuously or in one or more stages. The use of locally resolved or different refractive indices in particular allows the production of much thinner lenses with a progressive addition range, toms or the same than was previously possible. If necessary, this possibly only local index variance can also be combined in combination with a desired lens geometry, ie by adaptation of the local surface radius.

In addition or as an alternative to the variation of the refractive index, the different optical regions may otherwise have different optical properties, for example with regard to coloring, polarizing properties or the like. These optical properties can also be gradually or continuously, or in one or more stages merge into one another or vary as needed.

According to a fourth aspect of the present invention, which can also be implemented independently, the optical workpiece preferably has at least one connection element for the particular detachable connection of an associated component, in particular a spectacle component, wherein the connection element is generatively formed on the workpiece. This allows a very simple, safe, fast and / or flexible production or assembly, in particular a pair of glasses. Particularly preferably, the optical workpiece is used as a spectacle lens for a particular frameless glasses. For this purpose, the optical workpiece on different connection elements, wherein each of the connection elements is formed individually with regard to the assembly or connection of an associated spectacle component. This allows a particularly fast, simple and / or cost-effective production or connection, for example of a bracket, nose pads and / or web to the workpiece forming the spectacle lens.

A proposed, in particular frameless, glasses has at least one inventively embodied optical workpiece. In this way, corresponding advantages can be realized.

In general, it should be noted that the proposed aspects according to the present invention, the generative production of spectacle lenses and / or the eyewear production is only possible or simplified or, in particular the production individually to the respective spectacle wearer and its needs adapted eyeglass lenses and / or glasses allows and / or simplifies. In particular, the connection or integration into the glasses or the spectacle frame can be simplified, since preferably eliminates the edge processing or at least can be simplified and / or the connection of spectacle components to one or more terminal portions integrally formed on the spectacle lens can be simplified or only made possible.

The above-mentioned aspects and features of the present invention as well as the aspects and features of the present invention resulting from the claims and the following description can basically be implemented independently of one another, but also in any desired combination or order.

Additional advantages, features, characteristics and aspects of the present invention will become apparent from the claims and the following description of preferred embodiments with reference to the drawings. It shows:

Fig. 1 is a schematic plan view of a proposed arrangement with an optical workpiece and a holding member for holding the optical workpiece according to a first embodiment;

Fig. 2 is a schematic section of the arrangement taken along a line II-II of Fig. 1;

FIG. 3 is a fragmentary enlargement of FIG. 2 for illustrating a marginal mounting of the optical workpiece according to a first variant; FIG.

Fig. 4 is a further fragmentary enlargement of Fig. 2 for illustrating a peripheral support of the optical workpiece. according to a second variant;

5 shows a schematic section of the proposed arrangement according to a second embodiment; a partial enlargement of Figure 5 to illustrate a peripheral support of the optical workpiece.

7 shows a schematic section of the proposed arrangement according to a third embodiment; 8 shows a schematic section of the proposed arrangement according to a fourth embodiment;

9A is a schematic section of a proposed optical

Workpiece according to a first embodiment;

Fig. 9B is a schematic section of the proposed optical

Workpiece according to the first, slightly modified embodiment;

10A is a schematic section of the proposed optical

Workpiece according to a second embodiment;

10B is a schematic section of the proposed optical

Workpiece according to the second, slightly modified embodiment;

Fig. 11 is a perspective view of the proposed optical

Workpiece according to a third embodiment; and a perspective view of a proposed pair of glasses with two proposed optical workpieces as spectacle lens.

In the figures, the same reference numerals are used for the same or similar parts, and corresponding features and advantages are achieved, even if a repeated description is omitted for the sake of simplicity.

An object of the invention is an arrangement 1 with a proposed optical workpiece 2.

The workpiece or spectacle lens 2 is preferably produced generatively in the aforementioned sense, in particular from liquid starting materials. The starting materials may also be present in other forms, in particular in solid form, for example as granules, coils or the like, and are particularly preferably temporarily liquefied for additive production or during additive production.

The workpiece 2 is in particular an optical lens or a spectacle lens, in particular for a pair of spectacles 27. However, the following apply Options also for other lenses or other optical workpieces 2 accordingly.

Particularly preferably, the term "optical workpiece" denotes a finished optical lens having the desired optical and / or geometric properties. In particular, it is a peculiarity of the present invention that after the preferably generative production of the optical workpiece 2, no further shaping or material-removing machining, in particular for achieving the desired optical and geometric properties, are necessary.

The optical workpiece 2 is preferably made of plastic. However, in principle, it is also possible to use another material which is suitable for the generative production of the optical workpiece 2, in particular taking into account the desired or required optical material properties, such as the transparency and / or the refractive index.

If the optical workpiece 2 is to be used or used for a pair of glasses 27, which is preferably the case, the optical workpiece 2 is referred to as a spectacle lens, even if the optical workpiece 2 is preferably not made of glass.

In particular, the optical workpiece 2 is at least substantially flat or disc-shaped and / or has two opposite flat sides 2A, 2B, indicated in the schematic section according to FIG. 2.

In particular, the flat sides 2A, 2B each form a front side and a rear side of the optical workpiece 2. In the illustration example, one or each flat side 2A, 2B has an aspherical and / or free-formed surface and / or is provided with a - possibly individually adapted - Shape or curvature provided.

The arrangement 1 preferably has a retaining element 3 for holding and / or for receiving the optical workpiece 2.

The optical workpiece 2 and / or the holding element 3 is or are produced in particular generatively, in particular from liquid starting materials. At possible The method variants in connection with the generative production of the optical workpiece 2 and / or of the holding element 3 will be discussed in more detail later. The holding element 3 preferably has an at least substantially circular outline A in its plan view according to FIG. 1. However, other shapes are also possible here, in particular in which the outline A is substantially rectangular, square or oval. In its plan view, the optical workpiece 2 preferably has an outline U which is at least substantially non-circular or deviating from a circle, as indicated by dashed lines in FIG. However, in principle, a circular outline U of the optical workpiece 2 is possible. In particular, the workpiece 2 is already provided by the generative production at the edge or with an outer contour which is individually adapted to a spectacle frame of an associated spectacle 27 or an adapted outline U. Here, in particular, the lens contour or lens shape in plan view on the one hand and / or on the edge shape, ie the formation of an edge R or a peripheral surface or surface RF during the transition from one flat side 2A to the other flat side 2B of the workpiece 2 on the other hand.

In particular, the optical workpiece 2 is held over its entire circumference by the retaining element 3. In principle, however, only a partial holding is possible.

Particularly preferably, the holding element 3 is at least substantially annular and / or has an at least substantially annular-shaped, to be adapted to the workpiece 2 holding portion or area.

Particularly preferably, the holding element 3 is formed so that the optical workpiece 2 is supplemented to form a circular disk.

In particular, the holding element 3 has a uniform or defined shape or outer contour or an outline A, regardless of the lens shape or edge shape of the workpiece 2. This allows a very simple handling or processing of the optical workpiece. 2 Particularly preferably, the thicknesses of the optical workpiece 2 and of the holding element 3, in particular in the region of the edge R of the workpiece 2 and the transition of a flat side 2A of the optical workpiece 2 in a subsequent surface 3A, 3B of the holding member 3, at least substantially the same large, as indicated in Fig. 2.

Particularly preferably, the thickness of the retaining element 3 decreases starting from the edge R in the radial direction to the outside. In particular, one or each flat side 2A, 2B of the optical workpiece 2, in particular at the edge R, merges at least substantially smoothly and / or without interruption or flush into the adjoining surface 3A or 3B of the holding element 3. Particularly preferably, the curvature of one or each flat side 2A, 2B of the optical workpiece 2 continues on the surface 3A of the holding element 3.

In the illustrated example according to FIG. 1, the workpiece 2 schematically has two alternative edge shapes. Accordingly, in the schematic section according to FIG. 2, along the line II-II of FIG. 1, different edge shapes, ie formations or shapes of the circumferential edge surface or peripheral surface RF, are shown as possible design variants. Fig. 3 shows a partial enlargement of the right dotted line portion of Fig. 2, whereas in Fig. 4 is a partial enlargement of the left dotted line portion of Fig. 2 is shown.

The peripheral surface RF is understood, in particular, as the side surface of the workpiece 2 between the front side 2A and the rear side 2B. The transition from a flat side 2A or 2B to the edge surface or peripheral surface RF can optionally be formed like an edge or angled or rounded (as indicated in FIGS. 3 and 4). Alternatively or additionally, the transition may also be provided with a chamfer, not shown. This depends in particular on the respective spectacle frame and / or other design wishes.

The holding element 3 preferably engages only on the edge surface or peripheral surface RF on the workpiece 2. The workpiece 2 is preferably held only on the circumferential side or on its edge surface RF of the holding member 3 or halterbar, ie in particular laterally. In this connection, the arrangement 1 according to the invention allows, in particular, an optimal coating of the workpiece 2, for example in the so-called spin coating or spin coating method, since the workpiece 2 defines and / or in particular only at the edge and / or leaving at least one flat side 2A or 2B is held and / or the retaining element 3 in particular flush with the edge on a flat side 2A or 2B or both flat sides 2A, 2B of the workpiece 2 is connected.

The holding element 3 is designed in particular for the positive holding of the workpiece 2. However, in principle, a non-positive or clamping holding alternatively or additionally realized.

In particular, the holding element 3 engages with a particular circumferential or closed holding surface HF on the edge surface RF of the optical workpiece 2A, as shown schematically in Fig. 3 and 4.

In particular, the holding surface HF and the edge surface RF are at least substantially complementary to one another.

According to a first variant, the holding element 3 engages with an optionally rounded, preferably circumferential projection 4 in an associated, preferably circumferential groove or recess 5 of the edge surface RF, as indicated in Fig. 3.

Optionally, the recess 5 of the edge surface RF and / or the projection 4 of the holding surface HF is or are dimensioned and / or formed such that the projection 4 does not bear against the bottom of the recess 5.

Particularly preferably, the edge surface RF has at least one adjacent to the edge R beveled or chamfered section 6 as a transition to the adjacent flat side 2A, 2B.

In particular, the edge surface RF here has two such chamfers or chamfered sections 6. According to the second variant, the edge surface RF preferably has an in particular circumferential and / or rounded projection 7, which engages in a corresponding, in particular circumferential recess 8 of the holding element 3, as indicated in Fig. 4.

In particular, the edge surface RF here has rounded sections 9 towards the adjacent flat sides 2A, 2B, in particular so that the edge surface RF merges into the adjacent flat side 2A, 2B at least substantially smoothly or edge-free.

Preferably, a first intermediate layer 10, in particular for preventing a fluid connection between the workpiece 2 and the holding element 3, is formed between the holding element 3 and the optical workpiece 2, in particular between the edge surface or peripheral surface RF and the holding element or its holding surface HF or arranged.

In particular, the first intermediate layer 10, in particular substantially over the whole area, is arranged or formed between the holding surface HF and the edge surface RF.

Particularly preferably, the first intermediate layer 10 is arranged over the entire circumference of the optical workpiece 2 between the edge surface RF and the holding surface HF. However, it is also possible to arrange the intermediate layer 10 only in sections along the circumference of the optical workpiece 2 between the edge surface RF and the holding surface HF.

The first intermediate layer 10 is, in particular, a substance which preferably melts at low temperature and / or is soluble under the action of a solvent, such as a resin, a wax, an adhesive or the like.

In particular, the first intermediate layer 10 is in the form of a film and / or as a wet-chemical coating.

Preferably, the first intermediate layer 10 is at least partially elastic. Particularly preferred for the optical workpiece 2 and the holding element 3 different materials are used, which differ from each other in particular with regard to their mechanical properties, in particular hardness and / or density and / or strength and / or elasticity and / or plasticity.

Particularly preferably, the holding element 3 has a higher elasticity and / or a lower density than the optical workpiece 2.

Alternatively or additionally, it may be provided that different materials are used for the optical workpiece 2 and the holding element 3, which differ from one another with regard to their optical properties, in particular color, reflectivity, transmissivity and / or luminescence.

In particular, the holding element 3 is at least partially or entirely elastic, in particular to accommodate the workpiece 2 and / or (easier) to be able to release the holding element 3.

The holding element 3 can be destroyed, if necessary, for removing the workpiece 2, for example by breaking. For this purpose, the holding element 3 may have in particular (not shown) predetermined breaking points.

Preferably, the first intermediate layer 10 is formed such that it adheres to the holding element 3 (stronger than on the workpiece 2), in particular so that the workpiece 2 is released simultaneously from the first intermediate layer 10 during release from the holding element 3.

In general, a special feature of the present invention is the fact that a very simple production of the optical workpiece 2 and the holding element 3 or the arrangement 1 is made possible by the use of generative manufacturing methods, in particular wherein the holding element 3 - or the workpiece 2 - directly against the already produced workpiece 2 - or the holding element 3 - in particular generatively formed or manufactured, so that the desired holder of the workpiece 2 is realized by the holding element 3 immediately after the complete generative production of the assembly 1.

Alternatively, the workpiece 2 and the holding element 3 can also be produced generatively, in particular within the scope of a single production process, as an already completely assembled assembly, wherein the intermediate layer 10 In particular, it is also formed in particular generatively between the optical workpiece 2 and the holding element 3.

Alternatively, it is also possible to produce the intermediate layer 10 first, in particular generatively, and subsequently to manufacture the workpiece 2 and / or holding element 3 against the intermediate layer 10 in a further production process, in particular generatively again, but possibly also by casting, Spraying o.

The proposed arrangement 1 allows in particular the provision of a workpiece 2 with finished edge processing, so finished lens shape and edge shape. In particular, the outline U and / or the edge surface RF and / or the edge R are already individually adapted to a spectacle frame or an associated spectacle 27 after the generative production. Preferably, the desired optical properties are realized, in particular wherein one or both flat sides 2A, 2B of the workpiece 2 have a desired surface shape, which in particular can also be adapted individually to a later spectacle wearer. In contrast to conventional methods, in particular a final coating of the workpiece 2 can take place without subsequent edge processing. This simplifies the production significantly and / or in particular allows a production on site or outside of a central manufacturing facility.

Further embodiments will be explained below with reference to FIGS. 5 to 8, wherein in principle corresponding aspects and properties result, so that in particular only essential differences with respect to the illustrated with reference to FIGS. 1 to 4 first embodiment are described in detail.

According to a second embodiment, the holding element 3 preferably has at least one holding arm 11, as shown in FIG.

Particularly preferably, the holding arm 11 surrounds the optical workpiece 2 laterally and / or engages over the front side 2A of the workpiece 2 partially and / or in an edge zone RZ, as indicated in FIG. FIG. 6 shows a partial enlargement of the dot-dashed region of FIG. 5.

In particular, the holding arm 11 is designed to hold the workpiece 2 against the holding element 3 or a base element 12 or a flat side opposite receiving surface AF, as shown in FIGS. 5 and 6. Particularly preferably, the holding arm 11 engages the flat-side edge zone RZ on the front or flat side 2A of the optical workpiece 2 facing away from the receiving surface AF. Preferably, the edge zone RZ forms a self-contained and adjacent to the edge R and / or the edge surface RF partial surface of the flat side 2A of the optical workpiece. 2

In the illustrated example, the holding element 3 preferably has a plurality of holding arms 11, which are distributed over the circumference and hold the workpiece 2 in a form-fitting manner against the base element 12 or the receiving surface AF and / or hold or fix the workpiece 2 in a form-fitting manner laterally.

The lateral fixing of the workpiece 2 can in particular also be effected only by applying the retaining arms 11 to the front side 2A in the region of the edge zone RZ, provided that the edge zone RZ is inclined in such a way that it rises toward the center of the workpiece 2, as shown in FIG 6, so that this oblique component leads to the lateral fixing, without the holding arms 11 engaging laterally or circumferentially on the workpiece 2.

Alternatively, the retaining arms 1 1 can also only in the region of the transition of the flat side 2A to the edge surface RF or at the edge R and / or only on the edge surface RF, in particular in the region of a chamfered portion 6, as indicated in Fig. 3, or a rounded Section 9, as indicated in Fig. 4, attack or attack on the workpiece 2 or the optionally interposed therebetween the first intermediate layer 10.

In the illustrated example, the holding element 3 preferably forms the base element 12 and / or is integrally formed therewith or firmly connected thereto.

The receiving surface AF is preferably formed by the holding element 3 or base element 12. The receiving surface AF is in particular like a shell and / or for receiving or in particular full-surface or partial support of the rear or flat side 2B of the workpiece 2 is formed. Particularly preferably, the holding element 3 or base element 12 or the holding arms 1 1 are produced generatively.

Particularly preferably, the holding arms 11 and the base element 12 are made of different materials, preferably with respect to their mechanical properties, in particular hardness and / or density and / or strength and / or elasticity and / or plasticity and / or color and / or Reflectivity and / or transmissivity and / or luminescence differ from each other. Particularly preferably, the retaining arms 11 are materially connected to the base member 12 and formed on this or integrally formed therewith.

Here, however, other technical solutions are possible, in particular wherein the holding arm 1 1 relative to the base member 12 adjustable, in particular in the radial or lateral direction displaceable, can be arranged on the base member 12.

Optionally, the holding element 3 or base element 12 has a clamping section or basic body 13, preferably with a lateral clamping surface 14.

Particularly preferably, the clamping surface 14 is formed circumferentially.

In particular, the optical workpiece 2 or the holding element 3 can be clamped in a specific axial position and / or rotational position by means of the clamping section 13 or the clamping surface 14, in particular to hold, manufacture, process and / or coat the workpiece 2 ,

The base element 12 preferably protrudes laterally beyond the clamping section 13 with an edge section 12A in order to form an axial stop for clamping and / or supporting the workpiece 2 or the retaining arms 11.

As in the first embodiment, the workpiece 2 and the holding element 3 can be manufactured simultaneously and / or successively or optionally generatively.

Optionally, a second intermediate layer 15 is arranged between the workpiece 2 and the base element 12. Preferably, this is arranged between the receiving surface AF and the base element 12 facing flat side 2B.

In particular, the second intermediate layer 15 serves to prevent a coherent connection between the optical workpiece 2 and the base element 12 and / or to protect the rear side 2B of the workpiece 2.

In particular, the intermediate layer 15 can be produced and / or formed corresponding to the first intermediate layer 10, so that the explanations relating thereto apply correspondingly.

Hereinafter, a third embodiment of the proposed arrangement 1 will be explained with reference to the schematic section of Fig. 7. In the third embodiment, the holding member 3 according to the first embodiment is additionally provided with the base member 12 according to the second embodiment or with a flat-side support of the back side 2B of the workpiece 2. In this embodiment, the first and second intermediate layers 10, 15 may also be formed in one piece or continuously.

The holding element 3 and / or workpiece 2 are / is preferably in turn made generative.

In particular, with regard to the production and design, reference is made to the explanations of the first and second embodiments, which apply here accordingly in the third embodiment. 8 shows in a corresponding schematic section a fourth embodiment of the proposed arrangement 1. In contrast to the third embodiment, the preferably annular retaining element 3 on the one hand and the base element 12 with the optional clamping section 13 on the other hand are detachable from each other here. In particular, these are detachably connected or connectable to one another by means of a screw connection 16 or another connection.

As in the first embodiment, in the second, third and / or fourth embodiment, a generative production of the workpiece 2 and / or Holding element 3 and / or the intermediate layer 10 and / or 15 and / or base member 12 and the arrangement 1 is provided. The generative production can take place simultaneously or successively, in particular so that the workpiece 2 is held directly by the holding element 3 after completion in the desired manner. In particular, the holding element 3 or base element 12 and / or the intermediate layer 10 and / or 15 for the production of the workpiece 2 form a base, support and / or shape. In this way, corresponding advantages can be realized. In general, it should be noted that the holding element 3 or base element 12 can also be formed in the sense of a block piece for defined clamping, as indicated in particular in the second and fourth embodiment, in particular to allow or (further) machining or coating of the workpiece 2 simplify.

Particularly preferably, the second intermediate layer 15 preferably covers the receiving surface AF at least substantially over the entire surface or over the entire surface.

Alternatively, the second intermediate layer 15 is partially arranged on the receiving surface AF, for example in a plurality of mutually separate supporting points and / or in an annular region or the like.

Particularly preferably, the second intermediate layer 15 is film-like or is formed as a coating.

Optionally, the second intermediate layer 15 laterally or in the radial direction over the optical. Protruding workpiece 2.

In the following, preferred embodiments of the optical workpiece 2 according to the invention will be explained with reference to FIGS. 9 to 11.

9A shows in a schematic section a first embodiment of the proposed optical workpiece 2. The optical workpiece 2 preferably has at least two optical regions 17, 18, wherein the optical regions 17, 18 in particular have different refractive indices. Alternatively or additionally, the optical regions 17, 18 may also differ in other optical properties, such as coloring, light transmittance and / or polarization properties. In the illustrated embodiment, preferably at least one flat side 2A, 2B (front or rear side) and particularly preferably both flat sides 2A, 2B of the optical workpiece 2 are at least substantially planar. Particularly preferably, the optical regions 17, 18 are made of different materials, in particular wherein at least one of the optical regions 17, 18 made of a plastic, such as CR-39, polycarbonate or the like., Is made.

The difference between the calculation indices of the different optical regions 17, 18 is preferably more than 0.2, preferably more than 0.3, in particular more than 0.4, and / or less than 1.0.

Preferably, the optical regions 17, 18 are arranged one above the other, at least substantially in layers.

In particular, a preferably defined or curved interface 19 is formed between the optical regions 17, 18.

Particularly preferably, the desired optical image and thus the desired optical properties of the workpiece 2 are determined or determined by the curvature or shape of the interface 19. Thus, an otherwise required curvature of a flat side or both flat sides 2A, 2B of the workpiece 2 can be avoided or reduced. In particular, the interface 19 may have a free-form or optimally adapted to the respective optical requirements of a future spectacle wearer.

The proposed workpiece 2 is preferably produced generatively again, so that said formation and shaping of the interface 19 can be very simple and / or in particular also on-site or outside a central fabrication.

In the embodiment shown in FIG. 9A, in particular, an abrupt transition between the optical regions 17 and 18 is provided or represented, so that at the interface 19 of the refractive index in particular correspondingly abruptly or discontinuously or stepwise or abruptly changes.

However, alternatively or additionally, a continuous or gradual transition between the optical regions 17 and 18 and thus the refractive index can be provided or, in particular, realized by the preferred additive manufacturing. Such a gradual transition is shown schematically in FIG. 9B which, in a section corresponding to FIG. 9A, shows the first embodiment of the workpiece 2 in a somewhat modified variant. Namely, a boundary region 19A is formed or arranged here between the two optical regions 17 and 18. In particular, in this boundary region 19A, the refractive index and / or another optical parameter changes at least substantially gradually or in small or small steps, thus forming the transition between the two optical regions 17 and 18.

Particularly preferably, the boundary region 19A is constructed in a layered manner. Optionally, it may consist of a plurality of very thin layers, possibly also with different and / or varying, for example, in the radial direction layer thickness or be constructed.

For example, the boundary region 19A may also be manufactured or constructed by variations in the mixing ratio of two or more materials that optionally form the optical regions 17 and 18.

Particularly preferably, the workpiece 2 is designed as a so-called gradient lens. A gradient lens is understood to mean an optical workpiece 2, preferably a lens, which has a non-constant refractive index, preferably wherein the refractive index changes continuously or at least to a good approximation continuously. Particularly preferably, the refractive index changes in a direction extending radially to the optical axis O of the optical workpiece 2 (as explained with reference to FIG. 10B) and / or in a direction extending axially or parallel to the optical axis O of the optical workpiece 2 (as in FIG Fig. 9B provided).

Such a gradient lens advantageously makes it possible to produce a scattering or converging lens with optionally planar flat sides 2A, 2B. Alternatively or in addition to the non-constant refractive index, however, the gradient lens may also be curved or spherical flat sides 2A, 2B have front and / or rear. By combining the non-constant refractive index with a curved flat side 2A, it is possible to produce a lens that has the advantages of spherical lenses, for example a simple and cost-effective production, with the advantages of aspherical lenses, for example Correction of the spherical aberration to produce.

To produce a gradient lens, materials having different refractive indices are preferably used as starting materials. Due to the generative structure, these materials can be mixed or arranged such that an at least almost continuous course of the refractive indices of the optical workpiece 2 results.

For example, the refractive index n changes parabolically or quadratically with the radial distance from the optical axis O, that is, the refractive index n can function

where r denotes the radial distance from the optical axis O, n ₀ denotes the refractive index at the optical axis O, that is, at r = 0, g denotes the gradient constant, which is a measure of how fast the Refractive index with the radial distance from the optical axis O changes, and sech denotes the secant hyperbolic. Through this course of the refractive index n (r), a collecting or scattering lens can be realized.

In the illustration examples shown in FIGS. 9A and 9B, the optical regions or layers 17, 18 are preferably formed continuously in the radial direction. However, a local formation or radially limited extent of an optical region 17 or of the regions 17, 18 is possible, as indicated in the second embodiment according to FIGS. 10A and 10B.

10A shows in a schematic section a first embodiment of the second embodiment with a locally or in a radial part or portion of the workpiece 2 arranged first optical portion 17 extending from the second optical portion 18 by its optical properties, in particular by in Its refractive index differs. Thus, for example, a lens or a spectacle lens for a so-called bifocal eyeglasses or progressive lenses will be realized. In the second embodiment, therefore, in particular at least one of the regions 17, 18 does not form a radially continuous layer of the workpiece 2 or the lens formed therefrom. In the second embodiment, the two different regions 17 and 18 are arranged at least partially radially with respect to each other with respect to the optical axis O of the workpiece 2. In the embodiment variant shown in FIG. 10A, however, an axial layering of the two optical regions 17 and 18 is also preferably provided or formed.

10B shows in a corresponding schematic section a modified embodiment of the second embodiment of the workpiece 2. Here, the optical regions 17 and 18 are arranged in the radial direction with respect to the optical axis O of the workpiece 2 adjacent to each other, so that the refractive index changes in the radial direction , In particular, here again (as in the variant according to FIG. 9B) is a gradual or at least essentially continuous or (finely) stepped boundary region 19A as a transition between the two optical regions 17 and 18 and thus as a transition between the refractive indices of the other properties the two areas 17 and 18 provided or formed. Thus, as already mentioned, a gradient optics or a gradient lens can be formed.

As already explained, the optical image caused by the optical regions 17, 18 or the boundary surface 19 can also be combined with the usual flat-side shaping of the workpiece 2 in order to achieve the desired optical properties of the workpiece 2. In the case of the embodiment variants according to FIGS. 10A and 10B, for example, optionally the front side 2A is additionally curved. This may be, for example, a spherical or otherwise shaped surface.

Preferably, the generatively produced workpiece 2 with the optically different regions 17 and 18 additionally comprises antireflection layers (not shown) and / or other layers for surface protection. These layers are not shown in FIGS. 9 and 10, but are applied as required, in particular optionally by generative production and / or customary coating, for example immersion, vapor deposition, spin coating or the like. Fig. 11 shows a third embodiment of the proposed optical workpiece 2. This workpiece 2 is preferably made generative.

According to the third embodiment, the workpiece 2 preferably has at least one connection element 20 for connecting another component, in particular a spectacle component.

FIG. 12 illustrates in a schematic representation a proposed pair of spectacles 27 with two optical workpieces 2 as spectacle lenses and with two brackets 22, two nose pads 25 and a web 26, in particular nose or connecting web. The brackets 22, nose pads 25 and the web 26 represent spectacle components in the context of the present invention.

According to the third embodiment, the workpiece 2 illustrated in FIG. 11 preferably has more than one connection section 20, here a connection section 20A for connecting a bracket 22, a connection section 20B for connecting a side web or nose pads 25 and / or a connection section 20C for connecting a web 26, preferably nose or connecting web on.

The connection section 20 is preferably formed in each case on the workpiece 2 or integrally formed therewith. However, another cohesive connection is possible. The connection section 20 is produced in a generative manner, in particular just like the optical workpiece 2, in particular directly molded onto the workpiece 2.

The connecting portion 20 may be made of the same material as the optical workpiece 2 or of another material, in particular of a differently colored material.

Alternatively or additionally, the connection section 20 may also be formed by a prefabricated part, to which the workpiece 2, in particular the optical lens essential for the spectacle function, is formed, in particular such that a positive and / or cohesive assembly or, respectively, by the preferably generative production Cohesion is generated. Alternatively or additionally, the connecting portion 20 may also have an integrated or embedded reinforcing element and / or bearing or holding element which is prefabricated and / or made of a different material. The connection section 20 is arranged or formed in particular laterally and / or on the edge R or on the edge surface RF.

Depending on requirements, the connecting portion 20 may be rigid and / or elastic or partially elastic formed.

The connection section 20 is designed, in particular, to attach the associated spectacle component to a solvable or non-detachable, articulated, rigid or resilient and / or positive or materially bonded or frictionally engaged as required. The optical workpiece 2 therefore particularly preferably has a plurality of connecting elements 20, in particular wherein each of the connecting elements 20 is designed individually with regard to the connection to the associated spectacle component 22, 25, 26. Preferably, the connection portion 20A has or forms a bearing element 21, such as a bearing eye or the like, for preferably pivotable mounting or other attachment of the associated temple piece 22.

The connection section 20B is designed in particular for holding or supporting an associated nose bridge or nose pad 25 and / or preferably has an in particular arm-like holding section and / or connection section 24, as indicated schematically in FIG. 11. Alternatively or additionally, the nose pad 25 can also be formed directly from the connection section 20B or its holding section or connecting section 24, in particular directly in the context of the generative production, or formed on it. However, the connection section 20B or its holding section can also form a detachable mounting of the preferably replaceable and a separate component forming nose pad 25 only in the usual way. In particular, the connection section 20C has an engagement section 23 for the preferably latching, clamping and / or positive connection with the associated connection or nose bridge 26 and / or for connection to another component, such as another spectacle lens or connecting portion of a spectacle lens.

FIG. 12 shows the proposed spectacles 27 with, in particular, two workpieces 2, in the form of spectacle lenses according to the third embodiment.

The eyeglass temple 22 are preferably hinged or hinged connected via the connecting portions 20A and held. Alternatively, however, the eyeglass temple 22 can also be formed directly with it and, for example, be connected via an elastic or flexible connection section, wherein this connection section can also be formed by the connection section 20A.

The nose pads 25 are preferably exchangeable or detachably held by the respective connection section 20B or its connecting section 24. However, other constructive solutions are possible.

In the illustrated example, the two lenses or workpieces 2 are connected to each other by a separate web 26 or connectable. In particular, the web 26 is connected in a form-fitting, fixed and / or non-releasable manner to the respective workpiece 2 via the associated connection section 20C. For example, the web 26 can also be welded, glued, pressed, clamped and / or connected in any other way to the connection section 20C.

Alternatively, according to an embodiment not shown, also the web 26 can be omitted and a direct connection between the two connecting portions 20C of the two workpieces 2 can be formed.

The representation example is in particular a rimless eyeglasses 27 or is a socket for the lenses in particular not required.

Some or all of the spectacle components, in particular the temples 22 and the bridge 26, can also be manufactured as needed.

Various variants of the method in connection with the generative production of the optical workpiece 2 and / or of the holding element 3 will be explained below. The inventive method is used in particular for the generative production of a spectacle lens or workpiece 2, which already has desired, preferably individualized optical properties and / or geometric dimensions, so that in particular no shaping surface processing and / or edge processing is required.

For the generative production of the optical workpiece 2, a three-dimensional lens image data set, in particular a CAD model, is preferably generated first. This can be done, in particular, by selecting an already existing lens image data record from a database or by inputting or specifying lens parameters.

Specifically, the shape of one or each flat side 2A, 2B of the optical workpiece 2 is set in the lens image data set. Here, any desired shape is possible, so that, for example, aspheric and / or free-formed flat sides 2A, 2B can also be produced generatively.

Optionally, at least two optical regions 17, 18 with different refractive indices and / or the shape of an internal interface 19 and / or other desired parameters, for example corresponding materials for varying the refractive index of the optical regions 17, 18, are defined within the lens image data set. Preferably, each optical region 17, 18 is assigned an individual refractive index, in particular by appropriate definition of the production material.

Next, the desired course of the contour U and the desired shape of the edge surface RF or peripheral surface of the optical workpiece 2 within the lens image data set, so the line shape and edge shape, set. Optionally, the shape and arrangement of connection sections 20 are defined digitally in the lens image data set and, if present, a three-dimensional connection section image data set of the respective connection section 20 is generated. In particular, different connection sections 20, which are formed as a function of the respective spectacle component 22, 25 and 26, are provided, which can be accessed as required.

In particular, after the complete individual adaptation of the lens image data set, an acceptance query takes place, namely as to whether fitted lens image data set all optical and / or geometric properties of the optical workpiece 2 to be produced. If the lens image data record is accepted, in particular automatically a lens print data set is generated on the basis of which the generative production of the optical workpiece 2 takes place.

For the generative production of the holding element 3, first of all a three-dimensional holding element image data set, in particular a CAD model, is generated. This can be done in particular by selecting an existing holding element image data set from a database or by entering or specifying appropriate parameters.

According to a particularly preferred variant of the method, the holding element image data set is generated digitally or automatically in dependence, in particular by automatic generation of a negative mold, of the already completely modified lens image data set of the optical workpiece 2.

In particular, in the holding element image data set, a holding surface HF is formed which is formed at least substantially complementary to the edge surface RF.

Optionally, according to a particularly preferred variant of the method, a three-dimensional basic element image data set of the base element 12 is generated in addition to the holding element image data record or integrated therein.

Particularly preferably, a receiving surface AF for receiving a flat side 2A, 2B of the optical workpiece 2 is defined within the holding element or base element image data set. According to a particularly preferred variant of the method, the receiving surface AF is generated automatically, in particular by generating a negative mold of a corresponding flat side 2A, 2B.

According to a particularly preferred variant of the method, after the complete adaptation of the holding element image data record and / or basic element image data set, an acceptance query is carried out. If this acceptance question is answered in the affirmative, a retaining element print data record and / or a base element image data set is automatically generated, in particular, which automatically serves as the basis for the subsequent nerative production of the Haiteelements 3 and / or base member 12 serves or serve.

In the following, particularly preferred variants of the method will be explained further in the context of the generative production of the optical workpiece 2 and / or of the holding element 3.

Preferably, the lens print data set and / or the holding element print data set and / or the base element print data set for production are digitally split into layers and manufactured correspondingly in one or more generative production devices.

For the purposes of the present invention, the term "generative production device" preferably means a device which is designed to produce a component having a desired shape based on predetermined data or a transmitted three-dimensional data model from informal (liquids, powders or the like) .) or shape neutral (ribbon, wire) materials by chemical and / or physical processes. Thus, within the meaning of the present invention, this term is preferably to be understood broadly.

It should be noted that various requirements or aspects in the context of the additive manufacturing of the optical workpiece 2 on the one hand and of the holding element 3 on the other hand are to be considered, along with different preferences with regard to the various available generative manufacturing methods.

For example, in the generative production of the optical workpiece 2 in particular sufficient transparency or achievement of a defined refractive behavior in the foreground, so that in this context, generative manufacturing processes, such as stereolithography and / or multi-jet modeling (MJM) and / or liquid Starting materials, are preferred.

In connection with the generative production of the holding element 3, a generative manufacturing method is preferably used, which allows the processing of different materials.

According to a variant of the method, the optical workpiece 2 and the holding element 3 are in a (common) generative manufacturing facility - in particular especially simultaneously or temporally overlapping - manufactured, in particular so that the optical workpiece 2 and the holding element 3 is present as an already complete or assembled assembly or arrangement 1 immediately after manufacture.

In an alternative variant of the method, the optical workpiece 2 and the holding element 3 are produced in a (common) generative production device, in particular sequentially or successively, in particular so that the optical workpiece 2 and the holding element 3 are separated from one another after manufacture. independent components are present. In this case, the optical workpiece 2 and the holding member 3 are connected or assembled together to form the proposed arrangement 1 after the respective generative production. In a further alternative variant of the method, the procedure is such that the optical workpiece 2 and the holding element 3 are produced separately from one another in two generative production devices, in particular by different production methods. Preferably, the optical workpiece 2 is produced in front of the holding element 3 by a first manufacturing method.

Optionally, subsequently or after the generative production, the optical workpiece 2 is cleaned, in particular for removing unbound starting materials or other substances which disturb the further course of the process.

In particular, it may be provided to apply the first intermediate layer 10 to the workpiece 2, in particular an edge surface RF of the optical workpiece 2.

Alternatively, the first intermediate layer 10 is produced together with the optical workpiece 2 in the context of the first generative manufacturing process. Subsequently, the holding element 3 is constructed by a second different manufacturing process, in particular generatively around the optical workpiece 2 around. In particular, it may also be provided to form the holding element 3 together with the first intermediate layer 10 in the context of the second generative production method to the optical workpiece 2. In particular, it can also be provided to produce only the intermediate layer 10 first within the framework of the first generative production method and then to simultaneously or successively mold the workpiece 2 and / or the holding element 3 to the already produced intermediate layer 10, in particular generatively, but possibly also by casting, Spraying o.

In a further alternative method variant, the holding element 3 is produced in front of the workpiece 2 by a first generative manufacturing method.

In particular, it can be provided that the base element 12 is produced simultaneously with the holding element 3 in the context of the first generative manufacturing process, in particular so that the holding element 3 and the base element 12 are present as a one-piece component or already assembled assembly.

However, a method variant is also possible in which the base element 12 is produced separately from the holding element by a second or different generative production method. In this case, the optical workpiece 2 and the holding member 3 are joined together after the respective generative production. Optionally, the holding element 3 and the optionally produced base element 12 are subsequently freed of material residues or unbound material components and other substances possibly interfering with the further course of the process.

Subsequently or after the cleaning process, the optical workpiece 2 is produced on or on the already produced holding element 3, in particular wherein a second or different generative production method is used for the generative production of the optical workpiece 2.

If necessary, provision may be made for the second intermediate layer 15, which is designed in particular as a foil, preferably to be applied to the receiving surface AF prior to the production of the workpiece 2, in particular to be glued on. Subsequently, the optical workpiece 2 is formed integrally, in particular together with the holding element 3, on the second intermediate layer 15 of the base element 12. In particular, it can then be provided to apply the first intermediate layer 10 to the holding element 3, in particular the holding surface HF, and / or to apply the second intermediate layer 15 to the base element 12, in particular the receiving surface AF. Preferably, the optical workpiece 2 is then formed with its flat side 2B to the second intermediate layer 15 and with its edge surface RF to the first intermediate layer 10, in particular generative, alternatively by casting o. The like.

After the generative production of the optical workpiece 2 and of the holding element 3, the flat surface 2A of the optical workpiece 2 facing away from the receiving surface AF is processed, in particular coated.

In particular, the optical workpiece 2 can be lifted off or removed from the base element 12 together with the holding element 3 after complete machining of the flat side 2A.

Individual aspects and features of the present invention as well as individual process steps and / or process variants can be implemented independently of one another, but also in any desired combination and / or order.

LIST OF REFERENCE NUMBERS

1 Arrangement A Outline of the retaining element

2 optical workpiece 40 AF contact surface

2A first flat side HF holding surface

2B second flat side O optical axis

3 retaining element R edge

3A first surface RF edge surface / peripheral surface

3B second surface 45 RZ edge zone

4 projection of the holding surface

U Outline of the workpiece

5 recess of the edge surface

6 bevelled section

7 projection of the edge surface

8 recess of the holding surface

50

9 rounded section

10 first intermediate layer

1 1 holding arm

12 base element

12A edge section

13 main body / clamping section

14 clamping surface

15 second intermediate layer

16 screw connection

17 first optical range

18 second optical range

19 interface

9A limit

20 connection section

20A connection section

20B connection section

20C connection section

21 bearing section

22 eyeglass temple

23 engaging section

24 connecting section

25 nose pad

26 footbridge

27 glasses

Claims

claims:

1. Arrangement (1) with a preferably disc-shaped or planar optical workpiece (2), preferably an optical lens, in particular for a pair of spectacles (27),

wherein the assembly (1) comprises a holding member (3) for holding the workpiece (2), and

wherein the workpiece (2) and / or the holding element (3) is produced generatively,

characterized,

the workpiece (2) is held at least substantially in a form-fitting manner and / or laterally by the holding element (3).

2. Arrangement according to claim 1, characterized in that the holding element (3) in its plan view has an at least substantially circular outline (A).

3. Arrangement according to claim 1 or 2, characterized in that the optical workpiece (2) has an individually adapted to a spectacle frame outline (U).

4. Arrangement according to one of the preceding claims 1 to 3, characterized in that the workpiece (2) along its entire circumference of the holding element (3) is held.

5. Arrangement according to one of the preceding claims, characterized in that the holding element (3) is at least substantially annular or at least one annular holding portion.

6. Arrangement according to one of the preceding claims, characterized in that the thicknesses of the workpiece (2) and of the holding element (3) are at least substantially equal.

7. Arrangement according to one of the preceding claims, characterized in that one or each flat side (2A, 2B) of the workpiece (2) substantially chen smoothly and / or without interruption in a subsequent surface (3A, 3B) of the holding element (3) passes.

8. Arrangement according to one of the preceding claims, characterized marked, that the holding element (3) is at least partially elastic.

9. Arrangement according to one of the preceding claims, characterized in that the holding element (3) engages on a particular peripherally closed, narrow-side edge surface or peripheral surface (RF) of the workpiece (2).

10. Arrangement according to claim 9, characterized in that the holding element (3) engages with a holding surface (HF) on the peripheral surface (RF).

1 1. An arrangement according to claim 10, characterized in that the holding surface (HF) and the peripheral surface (RF) are at least substantially complementary to each other.

12. Arrangement according to one of the preceding claims, characterized in that between the workpiece (2) and the holding element (3) a particular first intermediate layer (10), in particular for preventing a material connection between the workpiece (2) and the holding element (3) is arranged.

13. Arrangement according to one of the preceding claims, characterized in that a surface (3A, 3B) of the holding element (3) at least substantially flush or smooth and / or interruption in an excluding flat side (2A, 2B) of the workpiece (2 ) passes over.

14. Arrangement according to one of the preceding claims, characterized in that the holding element (3) has at least one holding arm (11) for the particular positive holding of the workpiece (2).

15. Arrangement according to one of the preceding claims, characterized in that the arrangement (1) or the holding element (3) has a base element (12) with a receiving surface (AF) for a flat side (2A, 2B) of the workpiece (2). having.

16. Arrangement according to claim 15, characterized in that the receiving surface (AF) for complete or partial support of the flat side (2A, 2B) of the workpiece (2) is formed.

17. Arrangement according to claims 14 and 15 or 16, characterized in that the holding arm (1 1), the workpiece (2) engages over and holds against the receiving surface (AF).

18. Arrangement according to one of claims 15 to 17, characterized in that the receiving surface (AF) like a shell and / or at least substantially complementary to the flat side (2A, 2B) of the workpiece (2) is formed.

19. Arrangement according to one of claims 15 to 18, characterized in that the base element (12) releasably connected to the holding element (3) or connectable.

20. Arrangement according to one of claims 15 to 19, characterized in that between the base element (12) and the workpiece (2) a particular second intermediate layer (15), in particular for preventing a material connection between the base element (12) and the workpiece (2) is arranged.

21. Arrangement according to claim 20, characterized in that the intermediate layer (15) is arranged partially on the receiving surface (AF), in particular in a plurality of mutually separate support points and / or in a ring area.

22. The arrangement according to claim 20, characterized in that the intermediate layer (15) preferably covers the receiving surface (AF) at least substantially over the entire surface or over the entire surface.

23. A method for holding or producing a preferably disk-shaped or planar optical workpiece (2), preferably an optical lens, in particular for a pair of spectacles (27), by means of a holding element (3),

characterized, that the optical workpiece (2) is held in a form-fitting and / or laterally by the holding element (3).

24. The method according to claim 23, characterized in that the optical workpiece (2) is held along its entire circumference by the holding element (3).

25. The method according to claim 23 or 24, characterized in that the optical workpiece (2) on its peripherally closed, narrow-side edge surface (RF) or peripheral surface of the holding element (3) is held.

26. The method according to any one of claims 23 to 25, characterized in that the holding element (3) and the optical workpiece (2) are generatively produced as a fully assembled assembly or arrangement.

27. The method according to any one of claims 23 to 25, characterized in that the optical workpiece (2) and the holding element (3) are generatively produced as separate or non-assembled components of an assembly.

28. The method according to any one of claims 23 to 27, characterized in that between the workpiece (2) and the holding element (3) a particular first intermediate layer (10), in particular for preventing a material connection between the workpiece (2) and the holding element (3) applied or produced generatively.

29. The method according to any one of claims 23 to 28, characterized in that the workpiece (2) and the holding element (3) are produced simultaneously or temporally overlapping.

30. The method according to any one of claims 23 to 28, characterized in that the workpiece (2) and the holding element (3) are produced sequentially or successively.

31. The method according to claim 30, characterized in that the workpiece (2) is formed in particular generatively to the already preferably fully produced holding element (3).

32. The method according to claim 30, characterized in that the holding element (3) to the already preferably fully manufactured workpiece (2) is formed in particular generative.

33. The method according to any one of claims 23 to 32, characterized in that a flat side (2A, 2B) of the workpiece (2) over the entire surface or partially received by a receiving surface (AF) or supported on this.

34. The method according to claim 33, characterized in that the receiving surface (AF) is formed by a base element (12) which is produced in a generative manner in particular.

35. The method according to claim 34, characterized in that the holding element (3) and the base element (12) are produced in one piece or in one piece and / or non-destructively separable from each other.

36. The method according to claim 34, characterized in that the workpiece (2) and the base element (1 1) are produced as two independent or non-destructively detachable components.

37. The method according to any one of claims 33 to 36, characterized in that between the workpiece (2) and the receiving surface (AF) a particular second intermediate layer (15) applied and / or in particular produced generatively.

38. The method according to claim 37, characterized in that the intermediate layer (15) is applied over the entire surface or partially on the receiving surface (AF), in particular in a plurality of mutually separate supporting points and / or in an annular region.

39. The method according to claim 37 or 38, characterized in that the intermediate layer (15), in particular in the form of a film, is applied to the receiving surface (AF) or the workpiece (2).

40. The method according to any one of claims 37 to 39, characterized in that the workpiece (2) with a flat side (2A, 2B) in particular generatively to the intermediate layer (15) is integrally formed.

41. Optical workpiece (2), preferably optical lens, in particular for spectacles (27),

characterized,

the optical workpiece (2) has at least two generatively produced optical regions (17, 18) with different refractive indices.

42. Workpiece according to claim 41, characterized in that the optical regions (17, 18) are arranged one above the other in layers

43. Workpiece according to claim 41 or 42, characterized in that the optical regions (17, 18) in the axial direction of an optical axis (O) of the workpiece (2) are arranged one behind the other, so that the refractive index changes in the axial direction ,

44. Workpiece according to one of claims 41 to 43, characterized in that the optical regions (17, 18) in the radial direction of an optical axis (O) of the workpiece (2) are arranged side by side, so that the refractive index in the radial Direction changes.

45. Workpiece according to one of claims 41 to 44, characterized in that between the optical regions (17, 18) a curved interface (19) is formed.

46. Workpiece according to one of claims 41 to 45, characterized in that the difference between the refractive indices at an interface (19) of the optical regions (17, 18) is more than 0.5.

47. Workpiece according to one of claims 41 to 45, characterized in that the refractive index from one region (17) to the other region (18) merges continuously or gradually or in fine stages to form a gradient optics.

48. Workpiece according to one of claims 41 to 47, characterized in that the workpiece (2) is designed as an at least substantially geometrically planar progressive or progressive lens.

49. workpiece according to one of claims 41 to 48, characterized in that the workpiece (2) is disc-shaped or flat and / or one or two at least substantially planar and / or elevation-free flat sides (2A, 2B).

50. Workpiece according to one of claims 41 to 48, characterized in that the optical regions (17, 18) are made of different materials.

51. Workpiece according to one of claims 41 to 50, characterized in that the workpiece (2) has one or more anti-reflection layers.

52. Workpiece according to claim 51, characterized in that the anti-reflection layers are applied after additive production by coating.

53. workpiece according to claim 51, characterized in that the anti-reflection layers are made generative.

54. Optical workpiece (2), preferably optical lens, in particular for spectacles (27),

characterized,

the workpiece (2) has at least one generatively formed connection section (20) for connecting an associated component.

55. workpiece according to claim 54, characterized in that the workpiece (2) is produced generatively.

56. workpiece according to claim 54 or 55, characterized in that the component as a spectacle component, in particular temple (22), nose pad (25) or web (27) is formed.

57. workpiece according to one of claims 54 to 56, characterized in that the connecting portion (20) has a bearing portion (21) for connecting a spectacle arm (22) or forms.

58. workpiece according to one of claims 54 to 57, characterized in that the connecting portion (20) for connection or mounting a nose pad

(25) is formed.

59. workpiece according to one of claims 54 to 58, characterized in that the connecting portion (20) has an engagement portion (23) for latching, positive or material connection of a web (26) or for connection to a connection element (20C) for connecting a preferably having identically formed further optical workpiece (2).

60. workpiece according to one of claims 54 to 59, characterized in that the connecting portion (20) is at least partially elastic.

61. spectacles (27) with at least one optical workpiece (2) according to any one of claims 41 to 60 as a spectacle lens.

62. Spectacles according to claim 61, characterized in that the spectacles (27) is formed at least substantially borderless.

63. Use of an optical workpiece (2) according to any one of claims 41 to 60 as a spectacle lens for a pair of spectacles (27).

64. Use of an optical workpiece according to claim 63, characterized in that in the workpiece (2) according to one of claims 54 to 60 of the generatively molded connection portion (20) for connecting a spectacle component, in particular a spectacle arm (20), a nose pad (25 ) and / or a bridge

(26) is used.

65. Use according to claim 63 or 64, characterized in that the spectacles (27) is rimless or none of the workpieces (2) formed spectacle lenses has peripherally partially or completely encompassing spectacle frame.