Nano-structured zero-order diffractive filter
US7755835B2 · kind B2 · utility
4Cited by
4References
26Claims
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Key dates
| Filing date | May 30, 2007 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Apr 23, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/391
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zero order diffractive filter for polarised or unpolarised polychromatic light, comprises a grating line (10) microstructure (1) formed by a surrounding medium (12) with low index of refraction nlow and a waveguiding layer (11) with high index of refraction nhigh, the grating lines (10) having a period length Λ that is smaller than the wavelength of light for which the filter is designed. A plurality of single nanostructures (2) with dimensions in the nanometre range is superposed on a first interface (13) between the surrounding medium (12) and the waveguiding layer (11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.