Volume phase hologram with liquid crystal in microvoids between fringes
US5198912A · kind A · utility
138Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jul 10, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/33
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Composite holograms are disclosed wherein microvoids between the holographic interference fringes are filled with a liquid crystal. The diffraction efficiency and other holographic properties of such composite holograms may be varied by external stimuli, e.g., application of an electric field of thermal energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.