Reflective optical limiter
US9223157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2012 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Sep 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical limiter comprises a glass backing, a glass cover, and a layer of a phase changing material placed between said glass backing and said glass cover, the phase changing material comprising a transparent matrix having embedded particles of material that changes its optical properties due to temperature induced phase change of said material. The optical properties may change from transparent to reflective, from transparent to refractive or from transparent to scattering. The phase changing material is preferably at least one material selected from the group consisting of the elements Antimony, Bismuth, Cadmium, Lead, Tin and Indium and low-melting-point alloys of two or more of these elements. Two or more layers of phase changing materials may be used in a stack configuration, with each of the phase changing materials having a unique melting temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.