Apparatus for beam splitting
US5883746A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Mar 20, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/003
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for splitting a light beam into two sub-beams is formed of a stationary light source for generating a light beam, of a first polarization converter and of a deflection unit rotating around the optical axis in which two sub-beams are generated from the light beam. The deflection unit contains a polarization beam splitter, a following, second polarization converter and a reflector that is preferably designed as a prism. An automatic correction of positional offsets of the sub-beams is implemented in the deflection unit since the polarization beam splitter or the deflection unit is tilted and/or the lenses are shifted with adjustment drives. The positional offsets of the sub-beams are measured in their focus plane, and corresponding correction values are transmitted with a transformer to the adjustment drives in the rotating deflection unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.