Method for manufacturing optical elements according to a prescription
US11274361B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2018 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Apr 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/14
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing an optical element according to a prescription is provided, including providing a combination of a block piece and a lens blank having a first face and a second face opposite to the first face, the lens blank being blocked with the first face on the block piece, surfacing and polishing the second face of the lens blank, cleaning the lens blank, hard coating the second face of the lens blank, degassing the lens blank, applying an AR-coating in a vacuum box coater, and deblocking the processed lens blank from the block piece, wherein the cleaning step includes a pre-cleaning step including a finishing drying step allowing the lens blank to be put on hold, and a deep cleaning step prior to the hard coating step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.