Optical filter and spectrometer including sub-wavelength reflector, and electronic apparatus including the spectrometer
US10976477B2 · kind B2 · utility
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2References
22Claims
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Key dates
| Filing date | Jun 11, 2019 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Jun 11, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical filter includes a first reflector including a plurality of first sub-wavelength structures that are two-dimensionally arranged and spaced apart by a first period based on a first rule, and a second reflector provided separate from the first reflector, the second reflector including a plurality of second sub-wavelength structures that are two-dimensionally arranged and spaced apart by a second period based on a second rule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.