Optical fabry-perot based liquid level sensors
US12339153B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Feb 9, 2022 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Jun 27, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/804
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensor includes an optic fiber optically coupled to a cavity. An optical path is defined from the fiber, across the cavity, and reflected back across the cavity back into the fiber. The cavity is an open cavity that is in fluid communication with an environment ambient to the cavity for detection of changes in index of refraction inside the cavity due to whether the environment ambient to the cavity is gaseous or liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.