MEMS based ring laser gyroscope with reduced lock-in
US9574880B2 · kind B2 · utility
1Cited by
20References
16Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 28, 2012 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | May 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/661
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A ring laser gyroscope (RLG) includes moveable mirrors and a Micro-Electro-Mechanical Systems (MEMS) actuator coupled to the moveable mirrors to cause a respective displacement thereof that induces a phase modulation on counter-propagating light beams relative to one another. The induced phase modulation creates an optical path difference between the counter-propagating light beams corresponding to a virtual rotation that reduces the lock-in of the RLG.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.