Tilt multiplex holography
US5703705A · kind A · utility
19Cited by
2References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 1995 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | May 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/265
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system for high density holographic storage announced by Cal Tech is improved. The basic Cal Tech system records successive holograms by physically shifting the recording medium relative to the paired reference and signal beams. By depending on Bragg selectivity, successive holograms may be overlapped and still differentiated in the direction of overlap--in the "x-direction". The claimed system improves storage density by tilting the holographic plane to introduce a Bragg component in the y-direction, thereby enabling differentiation of overlapping holograms in that direction as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.