Multilayer optical device with surface texturing and extended cavities for electromagnetic radiation
US12287453B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 26, 2020 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | Feb 20, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/208
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device suitable for transmitting/reflecting electromagnetic radiation in a wavelength range of the electromagnetic spectrum. The device comprises at least a first coating layer made of a first material, a substrate made of a material different from the first material, and surface texturing forming cavities in the device. A lower layer, disposed directly below the first coating layer, is either a second coating layer made of a material different from the first material or the substrate itself. The lower layer has a predetermined thickness. The optical device has cavities that extend through the first coating layer and are sunk into the lower layer through at least part of its thickness. This structure enhances the optical properties of the device for specific applications in electromagnetic radiation transmission or reflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.