Stabilized reference surface for laser vibration sensors
US4777825A · kind A · utility
5Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jul 15, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides a vibration sensor with a platform mounted Bragg c frequency shifter and heterodyne detection system, wherein the reference beam is modulated with the component of platform vibration normal to the sensing beam, such that a similar modulation of the sensing beam is cancelled by the heterodyning process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.