Optical article having a photoluminescent mark
US10444537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2015 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | May 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/205
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to an optical article that includes, a mark that is positioned on and/or within the first surface of an optical substrate thereof, and a photochromic layer that includes at least one photochromic compound and which resides over at least a portion of the first surface. The mark includes a photoluminescent material. The first surface of the optical substrate is exposed to a source of actinic radiation, the photochromic compound has an activation time after exposure to the source of actinic radiation, and the mark luminesces and is visually observable during at least a portion of the activation time. The present invention also relates to: an optical article that includes, a mark that is positioned within the first surface of an optical substrate thereof, and at least one photochromic compound that is also positioned within the first surface; and methods of making such optical articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.