Static deflector device for an infrared beam
US4639091A · kind A · utility
115Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1984 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Feb 27, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The diffraction grating principle is used to deflect an infrared beam in a series of discrete predetermined directions. A periodic control voltage having a staircase waveform with N steps is applied across a liquid crystal layer to create local variations of refractive index therein, thereby setting up an infrared diffraction grating of adjustable pitch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.