Displacement detection device
US11512942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2019 |
| Grant date | Nov 29, 2022 |
| Priority date | — |
| Expiry date | Nov 20, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/261
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A displacement detection device is capable of stably and accurately detecting an amount of displacement. A polarization maintaining fiber has a length not to be equal to a length obtained by dividing, a product of an integral multiple of twice a length of a resonator times a refractive index of the resonator and a beat length obtained from a difference between propagation constants of two polarization modes, by a wavelength of the light source, is selected from a range including a length equal to the above length. The polarization maintaining fiber includes multiple polarization maintaining fibers fitted to each other by removable connectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.