Absolute gravimeter and measurement method based on vacuum optical tweezers
US12174335B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 28, 2020 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Dec 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V7/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An absolute gravimeter and a measurement method based on vacuum optical tweezers. The micro-nano particle releasing device is equipped with micro-nano particles, and is located above laser optical tweezers, and the laser optical tweezers have two capturing beams which pass through the respective convergent lenses and then converge at an intersection. An area where the intersection is located serves as an optical trap capturing region, and the micro-nano particles are stably captured by the two capturing beams in the optical trap capturing region. The optical interferometer is electrically connected to the signal processing device, the optical interferometer measures a displacement of the micro-nano particles in real time at the beginning of a free fall process from the optical trap capturing region and sends the displacement signal to the signal processing device. The signal processing device obtains a measured value of an absolute gravitational acceleration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.