Polarization controller
US5005952A · kind A · utility
26Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1988 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Dec 14, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1393
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarization controller comprises at least one stack of nematic liquid crystal cells arranged such that radiation incident on the stack will pass through each cell in the stack in sequence. Synchronized electric or magnetic fields are applied across the cells so as to change the phase retardation of the radiation transmitted through each cell by a chosen amount, the optical axes of the cells being oriented with respect to each other such that the polarization of radiation incident on the controller is caused by the controller to change from a first state to a second state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.