Workpiece with optical lens blank, method for the production thereof, and method for the machining thereof
US10061142B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 2016 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Dec 13, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B13/0057
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A workpiece has an optical lens blank with a first lens face and a second lens face, which are arranged opposite each other and are delimited at a lens circumference, and a cover film on the first lens face, wherein a first recess in the lens blank is formed, which is open in the direction of the first lens face and which is at least partially spanned in the direction of the first lens face by the cover film. A method for the production thereof and a method for the machining thereof. The machining method is distinguished, in particular, by the cover film being gripped for the purpose of pulling it off in the area that spans the first recess.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.