US 12,246,409 B2
Method for compensating positioning errors in an edging process, or in a fastening operation for a raw-edged, finished spectacle lens, and device therefor
Martin Dumm, Kirchberg (DE); Markus Grau, Ismaning (DE); Andreas Keil, Mühldorf (DE); Philipp Merkelbach, Bernried (DE); Ahmet Ögüt, Regen (DE); Karl Rahn, Regen (DE); Jasmine Reick, Munich (DE); Peter Szegö, Feldkirchen (DE); Arne Urban, Feldkirchen (DE); and Holger Wild, Schaufling (DE)
Assigned to Rodenstock GmbH, Munich (DE)
Appl. No. 17/042,721
Filed by Rodenstock GmbH, Munich (DE)
PCT Filed Mar. 29, 2019, PCT No. PCT/EP2019/058019
§ 371(c)(1), (2) Date Sep. 28, 2020,
PCT Pub. No. WO2019/185871, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 102018204948.3 (DE), filed on Mar. 29, 2018.
Prior Publication US 2021/0362294 A1, Nov. 25, 2021
Int. Cl. B24B 47/22 (2006.01); B24B 9/14 (2006.01); G02C 7/02 (2006.01)
CPC B24B 47/225 (2013.01) [B24B 9/148 (2013.01); G02C 7/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for compensating for positioning errors in an edging process or in a fastening process of a raw-edged finished spectacle lens having a curvature, the method comprising:
fastening the lens with a fastener at a fastening point consisting of a contact surface of the lens where the fastener contacts the lens, wherein, due to the lens curvature, there is formed a geometric prism in the fastening point,
determining centering deviation parameters, wherein the centering deviation parameters are indicative of the occurrence of positioning errors of the raw-edged finished spectacle lens during a fastening operation and/or during a subsequent edging process and wherein determination of the deviation parameters encompasses a calculation of the geometric prism in the fastening point, wherein the contact surface constitutes an extent of which the geometric prism is to be calculated, and
changing control information with the help of the determined centering deviation parameters, such that the positioning errors of the raw-edged finished spectacle lens are compensated and/or accounted for and a path of a grinder is altered during the edging process based on the changing control information.