Path length control signal derivation circuit for a laser angular rate sensor
US4781462A · kind A · utility
3Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Feb 9, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/662
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Electro-optical apparatus for the control of the optical path length in a laser angular rate sensor. An output of a fringe detector dual photodiode and preamplifier, normally present, is processed to recover a laser intensity component present as an amplitude modulation superimposed on the phase-modulated fringe detector signal. The laser intensity component is then provided as an input to the optical path length feedback control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.