System and method for holographic storage
US7576900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2006 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Mar 6, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and a method for holographic storage mainly involve forming a holographic interference pattern in a holographic recording medium. The holographic storage system utilizes a light source to emit a coherent beam. The coherent beam is irradiated to a first reflector to form a divergent beam. The divergent beam is then irradiated to a second reflector to form collimating beams (a signal beam and a reference beam). The signal beam goes through a spatial light modulator (SLM) and is modulated by the SLM. After that, the reference beam and the modulated signal beam are irradiated to a convergent unit, and are directed to the holographic recording medium for forming the holographic interference pattern. The holographic storage system that the light source is split into a signal beam and a reference beam by a set of reflectors according to the reflection principle without involving refraction may employ wavelength multiplexing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.