Method for the manufacture of cost-optimized spectacle lenses
US9164294B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2011 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | May 31, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/00019
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for manufacture of spectacle glasses from prefabricated blanks made without cutting. Each prefabricated blank has a front side not to be finished and an opposite back side. The front side and the back side have at least one optical focus in common. The method includes finishing the back side by calculating a prescription surface based on a prescription of a person. The prescription describes the vision defects of a left and a right eye of the person. The machined back side and the front side together form a first prescription lens and a second prescription lens. The method further includes making first and second spectacle glasses from the first and second prescription lenses. Focal points of the first spectacle glass correct the vision defect of the left eye and focal points of the second spectacle glass correct the vision defect of the right eye of the person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.