Frequency shifter and optical displacement measuring apparatus using the frequency shifter
US5796470A · kind A · utility
14Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Feb 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0327
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a frequency shifter for shifting a frequency of incident light beams. The frequency shifter has an electro-optic element for making incident the light beam whose frequency is to be shifted, an electrode unit disposed on the electro-optic element, an electric charge imparting circuit for imparting an electric charge to the electrode unit and a discharging circuit for discharging the electric charges accumulated in the electrode unit. Disclosed also is an apparatus, having the frequency shifter, for optically measuring relative displacement data to a measured object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.