Apparatus and method for precision coating of ophthalmic lenses with photochromic coatings
US12097521B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2016 |
| Grant date | Sep 24, 2024 |
| Priority date | — |
| Expiry date | Jul 15, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of manufacturing an optical article (10) includes supplying a first coating composition (A) and supplying one or more additional coating compositions (B) to an ultrasonic discharge nozzle (102) of a coating apparatus (100). At least one of the first coating composition (A) and the one or more additional coating compositions (B) is a photochromic coating composition. The method includes mixing the first coating composition and the one or more additional coating compositions at the ultrasonic discharge nozzle (102) of the coating apparatus (100), and applying the mixture (C) of the first coating composition (A) and the one or more additional coating compositions (B) to at least a portion of the optical article (10) so as to provide a pattern (24) on the optical article upon exposure to actinic radiation. The mixture (C) of the first coating composition (A) and the one or more additional coating compositions (B) is applied from the ultrasonic discharge nozzle (102) as a controlled, predetermined pattern of atomized droplets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.