Optical polarisation device
US6072628A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1998 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Jan 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/283
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical polarization device includes a source of light emitting a non-polarised light beam. A polarization separator reflects one polarization component of the light beam and transmits the other polarization component. A reflection means receives the component reflected by the polarization separator, rotates its polarization plane through 90.degree., and returns it to the polarization separator. The polarization separator is a plane element. The reflection means is positioned on the source side of the separator and consists of a regular network of prisms, each partially covered with a reflective layer associated with a .lambda./4 plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.