Multi-oscillator ring laser gyroscope with improved stabilization
US5096297A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1991 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Feb 28, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/667
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The gyroscope had a closed optical path (10) defined by four reflecting surfaces (11, 12, 13, 14). Counter-rotating beams of radiation circulating around the closed path are produced by a gaseous active lasing medium executed over a gain region (15) to produce a discharge in the gas. A reciprocal dispersion element (18) is located in the optical path and a solenoid (23) is wound around part of the gain region to produce a magnetic field over that region. One of the reflecting surfaces (14) is a partially transmitting mirror which passes a small proportion of the radiation incident upon it, and detectors (19, 20) detect radiation in each counter-rotating beams passing through the mirror (14). The alternating current components of the outputs of the detectors are used to control a control circuit (22) so as to control the magnetic field produced by the solenoid (23).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.