Narrowband transmission filter
US9945666B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2015 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Feb 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1866
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A narrowband transmission system includes a dielectric grating that defines a surface and includes a plurality of longitudinal members arranged along an axis. The longitudinal members are surrounded by a medium. The longitudinal members are made of a material that has an index of refraction that is greater than an index of refraction of the medium. The dielectric grating is configured to receive radiation at the surface. The system further includes a means for breaking a symmetry between the radiation and the dielectric grating such that the dielectric grating transmits a given wavelength band of the radiation through the dielectric grating while rejecting remainder of wavelengths embodied in the radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.