Hologram recording medium, and recording apparatus and reproducing apparatus for the same
US7369286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2005 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Nov 21, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hologram recording medium, and a recording apparatus and a reproducing apparatus for the same, by which scattered beam noise is minimized and recording capacity is increased using spatial separation and polarization separation in an optical system where a reference beam and an object beam travel through the same optical path. The provided hologram recording medium includes a recording layer into which an object beam and a reference beam are radiated to record data of the object beam as interference fringes, and first and second phase difference layers arranged above and below the recording layer, respectively, to convert the polarization of an incident beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.