Isotropic zero-order diffractive filter
US8542442B2 · kind B2 · utility
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4References
20Claims
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Key dates
| Filing date | May 7, 2008 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Jun 21, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1847
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to an isotropic zero-order diffractive color filter, to a method to manufacture an embossing tool and to a method to manufacture such a filter. The zero-order diffractive color filter comprises diffractive microstructures and a wave-guiding layer, wherein the diffractive microstructures possess a short range ordering over at least four times the period of the microstructures, and the diffractive microstructures possess a long range disordering over length scales of more than 100 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.