Radiation-source unit for generating a beam having two directions of polarisation and two frequencies
US5485272A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1994 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | May 24, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/33
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A radiation-source unit is described which produces a radiation beam (30) with two components (9, 10) which are polarized perpendicularly relative to one another and which have different frequencies. The unit comprises a radiation source, a beam splitter (4), an acousto-optical modulation system (13, 18) for generating the frequency difference, and a beam combiner (25). Since the beam splitter and the beam combiner are transmission elements and their connecting line extends through the center of the modulation system the unit is compact and no alignment problems occur. Moreover, the frequency difference is adjustable over a wide range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.