Holography using a Bi.sub.12 SiO or Bi.sub.12 GeO.sub.20 recording medium
US4138189A · kind A · utility
32Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1977 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Jul 1, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/54
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic storage cell for storing volume holograms wherein a plate of either Bi.sub.12 SiO.sub.20 or Bi.sub.12 GeO.sub.20 is provided with electrodes producing an electric field transversed to the plate. These electrodes may be on opposite ends of the plate, or in the form of interdigitated combs. In one embodiment, such a cell is utilized as a holographic memory wherein the modulation of the object beam and the deflection of the reference and object beams are controlled electronically. The cell may also be utilized to perform calculations by superpositioning data to perform addition and substraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.