Frequency shifter and optical displacement measurement apparatus using the same
US5629793A · kind A · utility
15Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1995 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | Jul 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4917
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A frequency shifter for modulating the frequency of an incident light beam is disclosed. This frequency shifter includes an electro-optic crystal portion to be arranged at an incident position, an electrode arranged on the electro-optic crystal portion, a voltage application unit for applying a voltage to the electro-optic crystal portion via the electrode, and a unit which is arranged at least at a portion of the electro-optic crystal portion to uniformize the temperature of the electro-optic crystal portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.