Photorefractive crystal interferometric device for measuring an angular rotational speed
US4659223A · kind A · utility
6Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1984 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Nov 1, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/64
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An interferometric device for measuring an angular rotational speed comprising an amplifying photo refractive crystal placed in the path of optical guide means forming a closed loop. Two signal waves penetrate into said crystal so as to obtain two contrarotating waves of different optical frequencies and of amplitudes restored by amplification in the crystal, moving in said closed loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.