Phase nulling optical gyro
US4299490A · kind A · utility
73Cited by
14References
74Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1978 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Dec 7, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/726
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A beam of light is split and introduced into different ends of a light path whose rotation is to be sensed. At least one frequency shifter is placed in the light path to affect the frequency difference of the two beams so as to introduce or adjust a nonreciprocal phase shift. The beams are then mixed back together and the resultant beam is detected and analyzed by suitable circuitry to provide an output indicative of rotation of the light path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.