Gradient photochromic dimming device and optical assembly including the same
US11543570B1 · kind B1 · utility
1Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2020 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Apr 29, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical dimming device is provided. The optical dimming device includes a photochromic element including a photochromic composition. The photochromic composition includes a combination of a first photochromic material and a second photochromic material having different steady-state absorption profiles. In a direction from a first portion to a second portion of the photochromic element, a concentration of the first photochromic material in the combination decreases and a concentration of the second photochromic material in the combination increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.