Switchable directional infrared radiation source
US9798218B2 · kind B2 · utility
1Cited by
5References
12Claims
0Family size
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Key dates
| Filing date | Nov 27, 2013 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/11
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A source of directional radiation in an IR band comprises at least a substrate and an external layer comprising controllable cells made of a metal insulator transition material that changes phase depending on its temperature relative to a temperature at which the corresponding wavelength is located in the IR band and that possesses a crystalline phase and an amorphous phase, and control means for controlling the phase change of the cells so as to form in this external layer a diffraction grating when the cells are controlled to the amorphous phase, in order thus to obtain a switchable directional source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.