Dual coupler device, spectrometer including the dual coupler device, and non-invasive biometric sensor including the spectrometer
US10466100B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 17, 2016 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Sep 18, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided are a dual coupler device configured to receive lights of different polarization components, a spectrometer including the dual coupler device, and a non-invasive biometric sensor including the spectrometer. The dual coupler device may include, for example, a first coupler layer configured to receive a light of a first polarization component among incident lights. and a second coupler layer configured to receive a light of a second polarization component among the incident lights, wherein a polarization direction of the light of the first polarization component is perpendicular to a polarization direction of the light of the second polarization component. The first coupler layer and the second coupler layer may be spaced apart from each other and extended along a direction in which the light propagates in the first coupler layer and the second coupler layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.