Pathlength controller for a ring laser gyroscope
US4267478A · kind A · utility
38Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1978 |
| Grant date | May 12, 1981 |
| Priority date | — |
| Expiry date | Nov 17, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/802
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for pre-setting the position of a piezoelectric actuator used in controlling the path length of the laser beam of a ring laser gyroscope is disclosed. The path length controller of this invention minimizes the necessary rectilinear motion of the actuator by presetting the actuator position according to the environmental or start-up temperature of the ring laser gyroscope to anticipate changes in the laser path length resulting from changes in the environmental temperature and/or self heating effect when the gyroscope is in operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.