Optical device and displacement information measurement apparatus using the same
US5640239A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Jun 22, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/499
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is disclosed an optical device having an electrooptic crystal on which a light beam is to be incident, and electrodes for applying a predetermined voltage to the electrooptic crystal. The electrooptic crystal is disposed in an optical system in which the angles of light rays in the light beam temporally or spatially change, and the electrodes are disposed, so that its voltage application direction is parallel to both the optic axis of the electrooptic crystal and the direction of polarization of the light beam incident on the electrooptic crystal, or is parallel to one of the optic axis and the direction of polarization and is perpendicular to the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.