Optical grating
US10151863B2 · kind B2 · utility
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1References
19Claims
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Key dates
| Filing date | Aug 12, 2013 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Sep 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B30/26
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
According to one aspect of the invention, there is provided an optical grating comprising a substrate comprising a plurality of protrusions with a space in between any two adjacent protrusions; and a cap provided on at least one of the plurality of protrusions at an end that is furthest from the substrate, wherein the cap has a higher degree of optical attenuation compared to the substrate material and wherein the combination of each protrusion and the respective cap thereon has a generally symmetric cross-sectional profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.