METHOD FOR MANUFACTURING A SPECTACLE LENS ACCORDING TO AT LEAST ONE DATA SET OF EDGING DATA

Abstract

A method for manufacturing a spectacle lens according to at least one data set of edging data and a computer program product with instructions for performing the method are disclosed. A spectacle lens blank, semifinished spectacle lens product, or a finished spectacle lens product is inspected for defects and compared to a data set to determine if it can be manufactured into an edged finished spectacle lens that fits into a specific spectacle frame such that the defect is not present in the edged finished spectacle lens.

Claims

1. A method for manufacturing a spectacle lens according to at least one data set of edging data, the method comprising: providing at least one of a plurality of spectacle lens blanks, a plurality of spectacle lens semifinished products, or a plurality of spectacle lens finished products; identifying at least one defect present in a spectacle lens blank, a spectacle lens semifinished product, or a spectacle lens finished product; separating at least one of spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products having the at least one defect from spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products not having the defect; detecting a position, a size, or the position and the size of the at least one defect; providing a data set of prescription data including a parameter for an optical correction effect of the spectacle lens; providing a data set of edging data; comparing the data set of prescription data with the at least one defect; comparing the data set of edging data with the at least one defect; assigning the at least one of the plurality of spectacle lens blanks, the plurality of spectacle lens semifinished products, or the plurality of spectacle lens finished products to a category depending on the comparison between the data set of prescription data with the at least one defect and the comparison between the data set of edging data with the at least one defect, wherein assigning the at least one of the plurality of spectacle lens blanks, the plurality of spectacle lens semifinished products, or the plurality of spectacle lens finished products to the category comprises including a respectively identified and respectively position-determined spectacle lens blank, spectacle lens semifinished product, or spectacle lens finished product having the defect in an intermediate storage inventory according to at least one abstract data set of edging data.

2. The method as claimed in claim 1, wherein the at least one abstract data set of edging data comprises at least one of: possible edging data, or possible boxing systems of the respective spectacle lens blank, the respective spectacle lens semifinished product, or respective the spectacle lens finished product to be stored in the intermediate store.

3. The method as claimed in claim 1, wherein the at least one abstract data set of edging data includes a determination whether a respective spectacle lens blank, spectacle lens semifinished product, or spectacle lens finished product stored in the intermediate store is available within a predetermined time t to manufacture an edged finished spectacle lens which fits into a spectacle frame.

4. The method as claimed in claim 3, wherein a value for the predetermined time t is dependent on an available intermediate storage capacity.

5. The method as claimed in claim 1, wherein the abstract data set of edging data includes a determination whether at least 47% of the intermediately stored spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products are available for manufacturing the finished edged spectacle lens.

6. The method as claimed in claim 1, wherein identifying the at least one defect present in the spectacle lens semifinished product comprises identifying a defect of a coating of an optically effective target surface of the spectacle lens semifinished product.

7. The method as claimed in claim 1, wherein an abstract data set of edging data comprises a data set for a spectacle lens to be manufactured within the predetermined time t.

8. The method as claimed in claim 1, wherein the category to which spectacle lens blanks are assigned is selected from the group consisting of: category 1, according to which the spectacle lens blank having the at least one identified and position-determined defect is processed further according to at least one concrete data set of prescription data and according to at least one concrete data set of edging data; category 3, according to which the spectacle lens blank having the at least one identified and position-determined defect, according to the at least one abstract data set of edging data, is included in an intermediate storage inventory; or category 4, according to which the spectacle lens blank having the at least one identified and position-determined defect is rejected.

9. The method as claimed claim 1, wherein the category to which the spectacle lens semifinished products or the spectacle lens finished products are assigned is selected from the group consisting of: category 2, according to which the spectacle lens semifinished product or the spectacle lens finished product having the at least one identified and position-determined defect is processed further according to at least one concrete data set of edging data and/or according to a concrete data set of prescription data; category 3, according to which the spectacle lens semifinished product or the spectacle lens finished product having the at least one identified and position-determined defect according to at least one abstract data set of edging data, is included in an intermediate storage inventory; or category 4, according to which the spectacle lens semifinished product or the spectacle lens finished product having the at least one identified and position-determined defect is rejected.

10. The method as claimed in claim 6, wherein the spectacle lens blanks according to category 1 or the spectacle lens semifinished products according to category 2 are further processed if the at least one identified and position-determined defect is situated in a region of the spectacle lens blank or the spectacle lens semifinished product which is removed during edging according to at least one of the data set of edging data or the data set of prescription data by mechanical processing of a front surface, a back surface, or the front surface and the back surface of the spectacle lens blank or the back surface of the spectacle lens semifinished product.

11. The method as claimed in claim 1, wherein the spectacle lens blank or the spectacle lens semifinished product is converted into the spectacle lens finished product and the spectacle lens finished product, after final edging, is converted into a finished spectacle lens fitting a spectacle frame.

12. The method as claimed in claim 1, wherein the spectacle lens blank or the spectacle lens semifinished product is arranged on a block piece according to at least one of the data set of edging data or the data set of prescription data.

13. A computer program product for providing a spectacle lens made from a spectacle lens blank according to at least one predefined data set of prescription data and according to at least one predefined data set of edging data, the computer program product being stored on a non-transitory computer-readable storage medium and having instructions to: provide at least one of a plurality of spectacle lens blanks, a plurality of spectacle lens semifinished products, or a plurality of spectacle lens finished products; identify at least one defect present in a spectacle lens blank, a spectacle lens semifinished product, or a spectacle lens finished product; separate at least one of spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products having the at least one defect from spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products not having the defect; detect a position, a size, or the position and the size of the at least one defect; provide a data set of prescription data including a parameter for an optical correction effect of the spectacle lens; provide a data set of edging data; compare the data set of prescription data with the at least one defect; compare the data set of edging data with the at least one defect; and assign the at least one of the plurality of spectacle lens blanks, the plurality of spectacle lens semifinished products, or the plurality of spectacle lens finished products to a category depending on the comparison between the data set of prescription data with the at least one defect and the comparison between the data set of edging data with the at least one defect, wherein assigning the at least one of the plurality of spectacle lens blanks, the plurality of spectacle lens semifinished products, or the plurality of spectacle lens finished products to the category comprises including a respectively identified and respectively position-determined spectacle lens blank, spectacle lens semifinished product, or spectacle lens finished product having the defect in an intermediate storage inventory according to at least one abstract data set of edging data.

14. A method for manufacturing a spectacle lens according to at least one data set of edging data, the method comprising: providing at least one of a plurality of spectacle lens blanks, a plurality of spectacle lens semifinished products, or a plurality of spectacle lens finished products; identifying at least one defect present in a spectacle lens blank, a spectacle lens semifinished product, or a spectacle lens finished product; separating at least one of spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products having the at least one defect from spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products not having the defect; detecting a position, a size, or the position and the size of the at least one defect; providing a data set of prescription data including a parameter for an optical correction effect of the spectacle lens; providing a data set of edging data; comparing the data set of prescription data with the at least one defect; comparing the data set of edging data with the at least one defect; and assigning the at least one of the plurality of spectacle lens blanks, the plurality of spectacle lens semifinished products, or the plurality of spectacle lens finished products to a category depending on the comparison between the data set of prescription data with the at least one defect and the comparison between the data set of edging data with the at least one defect, wherein the spectacle lens to be produced, according to the at least one data set of edging data, is positioned virtually on a part of the surface of the spectacle lens blank or on a part of anoptionally coatedoptically effective target surface of the spectacle lens semifinished product or on a part of one of anoptionally coatedoptically effective target surface of the spectacle lens finished product, which in each case has no defect.

15. A method for manufacturing a spectacle lens according to at least one data set of edging data, the method comprising: providing at least one of a plurality of spectacle lens blanks or a plurality of spectacle lens semifinished products; identifying at least one defect present in a spectacle lens blank or a spectacle lens semifinished product; separating at least one of spectacle lens blanks or spectacle lens semifinished products having the at least one defect from the spectacle lens blanks or the spectacle lens semifinished products not having the defect; detecting a position, a size, or the position and the size of the at least one defect; providing a data set of prescription data including a parameter for an optical correction effect of the spectacle lens; providing a data set of edging data; comparing the data set of prescription data with the at least one defect; comparing the data set of edging data with the at least one defect; and assigning the at least one of the plurality of spectacle lens blanks or the plurality of spectacle lens semifinished products to a category depending on the comparison between the data set of prescription data with the at least one defect and the comparison between the data set of edging data with the at least one defect, wherein the at least one spectacle lens blank or spectacle lens semifinished product is arranged on a block piece in a decentered manner according to the at least one of the data set of edging data or the data set of prescription data.

16. The method as claimed in claim 14, wherein the spectacle lens semifinished product is coated on the optically effective target surface or the spectacle lens finished product is coated on at least one of an optically effective target surface.

17. The method as claimed in claim 14, wherein identifying the at least one defect present in the spectacle lens semifinished product comprises identifying a defect of a coating of the optically effective target surface of the spectacle lens semifinished product.

18. The method as claimed in claim 14, wherein at least one data set of prescription data is provided in addition to the at least one data set of edging data.

19. The method as claimed in claim 18, wherein the at least one data set of prescription data is compared with the at least one defect of the spectacle lens semifinished product, and the spectacle lens semifinished product is assigned to a category depending on this comparison.

20. The method as claimed in claim 14, wherein identifying the at least one defect present in the spectacle lens finished product comprises identifying a defect of the coating of at least one optically effective target surface of the spectacle lens finished product.

21. The method as claimed in claim 20, wherein at least one data set of prescription data is provided in addition to the at least one data set of edging data.

22. The method as claimed in claim 20, wherein the at least one data set of prescription data is compared with the at least one defect of the spectacle lens finished product, and the spectacle lens finished product is assigned to a category depending on this comparison.

23. The method as claimed in claim 14, wherein the at least one data set of edging data is concrete or abstract.

24. The method as claimed in claim 14, wherein a concrete data set of edging data comprises a data set for a spectacle lens to be concretely manufactured and an abstract data set of edging data comprises a data set for a spectacle lens to be manufactured within the predetermined time t.

25. The method as claimed in claim 14, wherein the spectacle lens blank is assigned to a category selected from the group consisting of: category 1, according to which the spectacle lens blank having the at least one identified and position-determined defect is processed further according to at least one concrete data set of prescription data and according to at least one concrete data set of edging data; category 3, according to which the spectacle lens blank having the at least one identified and position-determined defect, according to at least one abstract data set of edging data, is included in an intermediate storage inventory; or category 4, according to which the spectacle lens blank having the at least one identified and position-determined defect is rejected.

26. The method as claimed in claim 14, wherein the spectacle lens semifinished product or the spectacle lens finished product is assigned to a category selected from the group consisting of: category 2, according to which the spectacle lens semifinished product or the spectacle lens finished product having the at least one identified and position-determined defect is processed further according to at least one of a concrete data set of edging data or a concrete data set of prescription data; category 3, according to which the spectacle lens semifinished product or the spectacle lens finished product having the at least one identified and position-determined defect according to the at least one abstract data set of edging data is included in an intermediate storage inventory; or category 4, according to which the spectacle lens semifinished product or the spectacle lens finished product having the at least one identified and position-determined defect is rejected.

27. The method as claimed in claim 25, wherein the spectacle lens blanks according to category 1 or the spectacle lens semifinished products according to category 2 are further processed if the at least one identified and position-determined defect is situated in a region of the spectacle lens blank or the spectacle lens semifinished product which is removed during edging according to at least one of the data set of edging data or the data set of prescription data by mechanical processing of a front surface, a back surface, or the front surface and the back surface of the spectacle lens blank or the back surface of the spectacle lens semifinished product.

28. The method as claimed in claim 14, wherein the spectacle lens blank or the spectacle lens semifinished product is converted into the spectacle lens finished product and the spectacle lens finished product, after final edging, is converted into a finished spectacle lens fitting a spectacle frame.

29. The method as claimed in claim 14, wherein the at least one data set of prescription data includes at least one parameter required for an optical correction effect of the spectacle lens.

30. A computer program product for providing a spectacle lens made from a spectacle lens blank according to at least one predefined data set of prescription data and according to at least one predefined data set of edging data, the computer program product being stored on a non-transitory computer-readable storage medium and having instructions to: provide at least one of a plurality of spectacle lens blanks, a plurality of spectacle lens semifinished products, or a plurality of spectacle lens finished products; identify at least one defect present in a spectacle lens blank, a spectacle lens semifinished product, or a spectacle lens finished product; separate at least one of spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products having the at least one defect from spectacle lens blanks, spectacle lens semifinished products, or spectacle lens finished products not having the defect; detect a position, a size, or the position and the size of the at least one defect; provide a data set of prescription data including a parameter for an optical correction effect of the spectacle lens; provide a data set of edging data; compare the data set of prescription data with the at least one defect; compare the data set of edging data with the at least one defect; and assign the at least one of the plurality of spectacle lens blanks, the plurality of spectacle lens semifinished products, or the plurality of spectacle lens finished products to a category depending on the comparison between the data set of prescription data with the at least one defect and the comparison between the data set of edging data with the at least one defect, wherein the spectacle lens to be produced, according to the at least one data set of edging data, is positioned virtually on a part of the surface of the spectacle lens blank or on a part of anoptionally coatedoptically effective target surface of the spectacle lens semifinished product or on a part of one of anoptionally coatedoptically effective target surface of the spectacle lens finished product, which in each case has no defect.

31. A computer program product for providing a spectacle lens made from a spectacle lens blank according to at least one predefined data set of prescription data and according to at least one predefined data set of edging data, the computer program product being stored on a computer-readable medium and having instructions to: provide at least one of a plurality of spectacle lens blanks or a plurality of spectacle lens semifinished products; identify at least one defect present in a spectacle lens blank or a spectacle lens semifinished product; separate at least one of spectacle lens blanks or spectacle lens semifinished products having the at least one defect from the spectacle lens blanks or the spectacle lens semifinished products not having the defect; detect a position, a size, or the position and the size of the at least one defect; providing a data set of prescription data including a parameter for an optical correction effect of the spectacle lens; provide a data set of edging data; compare the data set of prescription data with the at least one defect; compare the data set of edging data with the at least one defect; and assign the at least one of the plurality of spectacle lens blanks or the plurality of spectacle lens semifinished products to a category depending on the comparison between the data set of prescription data with the at least one defect and the comparison between the data set of edging data with the at least one defect, wherein the at least one spectacle lens blank or spectacle lens semifinished product is arranged on a block piece in a decentered manner according to the at least one of the data set of edging data or the data set of prescription data.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0119] The disclosure will now be described with reference to the drawings wherein:

[0120] FIGS. 1A-1D show a schematic two-dimensional plan view of a spectacle lens semifinished product or respectively a spectacle lens finished product having a defect and two planned data sets of edging data;

[0121] FIGS. 2A-2D show a schematic two-dimensional plan view of a spectacle lens semifinished product or respectively a spectacle lens finished product having a defect and possible virtual arrangements of the finished spectacle lens on the spectacle lens semifinished product or respectively the spectacle lens finished product;

[0122] FIG. 3 shows a schematic two-dimensional cross section through a spectacle lens semifinished product having a defect and two planned data sets of prescription data, typically concrete prescription data;

[0123] FIGS. 4A-4C show a schematic two-dimensional cross section through a spectacle lens semifinished product having a defect and one planned data set of prescription data, typically concrete prescription data, and possible virtual arrangements of the finished spectacle lens within the spectacle lens semifinished product; and

[0124] FIGS. 5A and 5B show a schematic two-dimensional cross section through a spectacle lens semifinished product or a spectacle lens finished product respectively having a defect, wherein the spectacle lens semifinished product is arranged on a block piece.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0125] FIGS. 1A-1D show a schematic two-dimensional plan view of a spectacle lens semifinished product or respectively a spectacle lens finished product having a defect and two planned data sets of edging data.

[0126] FIG. 1A illustrates a spectacle lens semifinished product or respectively a spectacle lens finished product 20, on which a defect 99 is situated.

[0127] The spectacle lens semifinished product or respectively the spectacle lens finished product 20 having the defect 99 from FIG. 1A can be seen in FIG. 1B. The virtual positioning of a first finished spectacle lens in accordance with a first data set of edging data 30.1 is identified by the just dashed line and the virtual positioning of a second finished spectacle lens in accordance with a second data set of edging data 30.2 is identified by the dash-dotted line.

[0128] The defect 99 is situated within the first virtually positioned finished spectacle lens according to the first data set of edging data 30.1, and so it is not possible to produce this spectacle lens with this virtual positioning on the spectacle lens semifinished product or respectively the spectacle lens finished product 20. The virtual positioning of a second finished spectacle lens in accordance with a second data set of edging data 30.2 reveals, by contrast, that the region in which the defect 99 lies will be cut away during final edging. Therefore, the spectacle lens semifinished product or respectively the spectacle lens finished product 20 having the defect 99 can be used to manufacture a finished, edged spectacle lens according to the second data set of edging data 30.2.

[0129] FIG. 1C illustrates the spectacle lens semifinished product or respectively the spectacle lens finished product 20 having the defect 99 from FIG. 1A with the spectacle lens 10.1 which would be cut out from the spectacle lens semifinished product or respectively the spectacle lens finished product 20 according to the first data set of edging data 30.1. The cut-away region of the spectacle lens semifinished product or respectively the spectacle lens finished product 20 is illustrated in a hashed manner. Since the defect 99 would remain on the finished, edged spectacle lens 10.1, this realization is not preferred. Since, in this case, the defect 99 would be situated in the edge region of the finished spectacle lens 10.1, such a spectacle lens could be offered, if appropriate, as a finished, edged spectacle lens in a lower price category.

[0130] FIG. 1D illustrates the spectacle lens semifinished product or respectively the spectacle lens finished product 20 having the defect 99 from FIG. 1A with the spectacle lens 10.2 which would be cut out from the spectacle lens semifinished product or respectively the spectacle lens finished product 20 according to the second data set of edging data 30.2. The cut-away region of the spectacle lens semifinished product or respectively the spectacle lens finished product 20 is illustrated in a hashed manner. Since the defect 99 would no longer remain on the spectacle lens 10.2, this realization is possible.

[0131] According to the disclosure, a spectacle lens semifinished product that is optionally coated on the optically effective target surface or respectively a spectacle lens finished product 20 that is optionally coated on at least one of the optically effective target surfaces from FIG. 1A is examined for at least one defect after its respective manufacture, wherein the defect 99 can also be identified on the coating.

[0132] Data sets of edging data 30.1 and 30.2 are then received. The respective virtual positioning of the corresponding finished, edged spectacle lens on the spectacle lens semifinished product or respectively the spectacle lens finished product 20 is illustrated in FIG. 1B.

[0133] A comparison is then carried out to establish whether the first data set of edging data 30.1 is suitable in order to be able to manufacture a finished spectacle lens with the spectacle lens semifinished product or respectively the spectacle lens finished product 20 having the defect 99. It is evident from FIG. 1C that the finished spectacle lens 10.1 would bear the defect 99. Therefore, this spectacle lens semifinished product or respectively spectacle lens finished product 20 will typically not be used with this data set of edging data 30.1. It is evident from FIG. 1D that the finished spectacle lens 10.2 would not bear the defect 99. Therefore, the spectacle lens semifinished product or respectively the spectacle lens finished product 20 can be used with the data set of edging data 30.2 for manufacturing a finished spectacle lens.

[0134] FIGS. 2A-2D show a schematic two-dimensional plan view of a spectacle lens semifinished product or respectively a spectacle lens finished product 20 having a defect 99 and possible virtual positionings of a spectacle lens to be manufactured in variants 10.1 to 10.4 on the spectacle lens semifinished product or respectively the spectacle lens finished product 20.

[0135] FIG. 2A illustrates a spectacle lens semifinished product or respectively a spectacle lens finished product 20 having a defect 99. The defect 99 is located within the virtual positioning of the spectacle lens 10.1 to be manufactured. Therefore, it is not preferred to manufacture the spectacle lens 10.1 with this spectacle lens semifinished product or respectively spectacle lens finished product 20. As already mentioned above, the spectacle lens 10.1 can however also constitute a spectacle lens in a lower price category, in the case of which the defect 99 in the edge region is tolerated.

[0136] In FIG. 2B, the virtual positioning of the spectacle lens 10.1 to be manufactured from FIG. 2A has been displaced along the depicted arrows A and is now located in the virtual positioning of the spectacle lens 10.2 to be manufactured. According to at least one data set of edging data, this spectacle lens 10.2 to be manufactured from FIG. 1B is identical to the spectacle lens 10.1 to be manufactured from FIG. 1A, but this displacement according to FIG. 2B avoids the defect 99.

[0137] Equally, FIG. 2C alternatively illustrates a displacement along the arrows B, which chooses the virtual positioning of the spectacle lens 10.3 to be manufactured on the spectacle lens semifinished product or respectively the spectacle lens finished product 20 such that the defect 99 is not located within the spectacle lens 10.3.

[0138] FIG. 2D shows that a rotation along the rotation axis C also makes it possible to find a virtual positioning for a spectacle lens 10.4 on the spectacle lens semifinished product or respectively the spectacle lens finished product in the case of which the defect 99 is avoided.

[0139] Which of the individual alternatives is chosen can be clarified in the respective step of comparison in accordance with the method according to the disclosure. In the course of choosing which of the individual alternatives from FIG. 2B, 2C, or 2D should be given preference, optionally at least one data set of prescription data can also be taken into account. Moreover, it is possible to take account of the optimization of the production steps for the individual variants.

[0140] FIG. 3 shows a schematic two-dimensional cross section through a spectacle lens semifinished product 20 having a defect 99 and two data sets of prescription data 35.1 and 35.2.

[0141] It is evident that the spectacle lenses to be produced according to both data sets of prescription data 35.1 and 35.2 lie completely within the spectacle lens semifinished product 20. It is also evident that in both cases the data sets of edging data include the defect 99 since, for both spectacle lenses to be produced, the defect 99 lies within the data sets of edging data of the spectacle lenses and will not be cut away during final edging. The data set of prescription data 35.1 includes the defect 99, while the data set of prescription data 35.2 does not include the defect 99. In the latter case, the defect 99 is removed during the mechanical processing according to the data set of prescription data 35.2.

[0142] By taking account of the data set of prescription data 35.2, it is thus possible to realize this spectacle lens to be produced with the spectacle lens semifinished product 20 despite the defect 99, even though it should have been rejected following simple consideration of the data set of edging data. The rejects can thus be reduced by taking account of the data sets of prescription data.

[0143] FIGS. 4A-4C show a schematic two-dimensional cross section through a spectacle lens semifinished product 20 having a defect 99, the data sets of prescription data 35.1 to 35.3 and possible virtual positionings within the spectacle lens semifinished product 20.

[0144] FIG. 4A reveals a data set of planned prescription data 35.1, according to which the spectacle lens to be produced is indeed located within the spectacle lens semifinished product 20, but the defect 99 will lie in the spectacle lens to be produced. Such a realization is not preferred. As already mentioned, spectacle lenses having a defect 99 in the edge region may possibly be offered as spectacle lenses in a lower price category.

[0145] In accordance with the method according to the disclosure, it is then possible to carry out a comparison as to whether it is possible to realize this spectacle lens to be produced in accordance with the data set of prescription data 35.1 within the spectacle lens semifinished product 20 such that the spectacle lens to be produced remains within the spectacle lens semifinished product 20 and at the same time the defect 99 is not located within this spectacle lens to be produced.

[0146] FIG. 4B illustrates a spectacle lens to be produced in accordance with the data set of prescription data 35.2, which spectacle lens was made possible by virtual displacement of the spectacle lens to be produced from FIG. 4A along the arrow A on the spectacle lens semifinished product 20.

[0147] FIG. 4C illustrates a spectacle lens to be produced in accordance with the data set of prescription data 35.3, which spectacle lens was attained by virtual displacement of the spectacle lens to be produced from FIG. 4A by displacement along the arrow B on the spectacle lens semifinished product.

[0148] Comparison of these possible arrangements of the spectacle lens to be produced according to FIGS. 4A, 4B, and 4C reveals that the spectacle lens to be produced according to FIGS. 4A and 4C is typically not realizable since in FIG. 4A the defect 99 lies in the edge region of the spectacle lens to be produced, while in FIG. 4C the spectacle lens to be produced is no longer located completely in the spectacle lens semifinished product 20. However, the spectacle lens to be produced according to FIG. 4B is situated within the spectacle lens semifinished product 20 and the defect 99 is not located within this spectacle lens to be produced. Thus, the spectacle lens to be produced is typically manufactured according to the data set of prescription data 35.2 according to FIG. 4B by means of the spectacle lens semifinished product 20.

[0149] FIG. 5A shows a cross section of a spectacle lens semifinished product or spectacle lens finished product arranged on a block piece for the purpose of processing according to a data set of prescription data. In FIG. 5A, the spectacle lens semifinished product or respectively the spectacle lens finished product is arranged centrally on the block piece.

[0150] FIG. 5B shows a cross section of a spectacle lens semifinished product or spectacle lens finished product arranged on a block piece for the purpose of processing according to a data set of prescription data, wherein the spectacle lens semifinished product or respectively the spectacle lens finished product was arranged in a decentered manner in comparison with FIG. 5A. This decentration serves to avoid the defect.

[0151] The method according to the disclosure has provided a method by which production of spectacle lenses with reduced rejects can be realized.

[0152] The foregoing description of the exemplary embodiments of the invention illustrates and describes the present disclosure. Additionally, the disclosure shows and describes only the exemplary embodiments but, as mentioned above, it is to be understood that the disclosure is capable of use in various other combinations, modifications, and environments and is capable of changes or modifications within the scope of the concept as expressed herein, commensurate with the above teachings and/or the skill or knowledge of the relevant art.

[0153] The term comprising (and its grammatical variations) as used herein is used in the inclusive sense of having or including and not in the exclusive sense of consisting only of. The terms a and the as used herein are understood to encompass the plural as well as the singular.

[0154] All publications, patents and patent applications cited in this specification are herein incorporated by reference, and for any and all purposes, as if each individual publication, patent or patent application were specifically and individually indicated to be incorporated by reference. In the case of inconsistencies, the present disclosure will prevail.

LIST OF REFERENCE SIGNS

[0155] 10 Spectacle lens [0156] 20 Spectacle lens semifinished product or spectacle lens finished product [0157] 30 Data set of edging data [0158] 35 Data set of prescription data [0159] 99 Defect