Method and apparatus for isolating data storage regions in a thick holographic storage media
US5377176A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1993 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Jul 14, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/54
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic storage media for storing digital data in the form of an interference grating is provided which includes a plurality of slabs of photorefractive material (72) arranged in a stack, with one edge thereof comprising an incident face (74). A data beam (39) having data superimposed thereon and a reference beam (38) are input to the face (74) to record a holographic image of the data in one of the slabs (72). Each of the slabs has a plurality of adjacent storage regions formed therein. The data and reference beams are disposed in a plane perpendicular to both the face (74) and the side (75) of the slabs (72), such that the reference beam (38) is confined within the slab (72) for all angles of the reference beam (38).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.