Method of determining the position of a drill hole to be drilled on an ophthalmic lens
US8300983B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2007 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Mar 3, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B13/0055
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method of determining the position of a target drill hole to be drilled in a target corrective lens having an expected target outline after shaping, the position being determined from a reference lens having a reference outline and at least one reference drill hole, the method includes: acquiring an image and at least one characteristic of the curvature of the reference lens; determining, in the acquisition plane, the reference distance in projection between the projection of a reference anchor point of the associated reference lens and the reference lens and the projection of a reference drilling point of the reference drill hole calculating the three-dimensional reference distance between the reference anchor point and the reference drilling point as a function of the characteristic of the curvature of the reference lens (100) and of the determined reference distance; and determining the position of the target drilling point for the target drill hole of the target corrective lens as a function of the calculated three-dimensional reference distance (R2; R5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.