Hologram recording method, hologram recording device, hologram playback method, and optical recording medium
US7557970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2006 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Jul 13, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hologram recording method, which records signal light onto an optical recording medium as a hologram, includes: placing a signal light region, which generates signal light, and a reference light region, which generates reference light, symmetrically with respect to an optical axis of coherent light by displaying, on a spatial light modulator which spatially modulates the incident coherent light, a pattern which divides a modulating region into a plurality of regions; generating signal light and reference light by modulating the incident coherent light by the spatial light modulator; simultaneously and coaxially illuminating, onto a reflecting-type optical recording medium, the signal light and the reference light generated from the signal light region and the reference light region disposed symmetrically to one another; and recording the signal light on the optical recording medium as a hologram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.